Substituted pyrrolo[2,3-d]pyridazin-4-ones and pyrazolo[3,4-d]pyridazin-4-ones as protein kinase inhibitors

1. A compound of formula (II)

or a pharmaceutically acceptable salt thereof, wherein:

Ring Q1 is selected from aryl and heteroaryl, wherein aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

Ring Q2 is selected from C 3-10 cycloalkyl, heterocyclyl, aryl and heteroaryl, wherein cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

L is selected from a bond, —(CR C1 R D1 ) t —, —C(O)—, —O—, —(CR C1 R D1 ) t O—, —O(CR C1 R D1 ) t —, —S—, —S(O) r —, —(CR C1 R D1 ) t S—, —S(CR C1 R D1 ) t —, —N(R A1 )—, —N(R A1 )C(O)—, —C(O)N(R A1 )—, —N(R A1 )C(O)O—, —OC(O)N(R A1 )—, —N(R A1 )C(O)N(R B1 )—, —N(R A1 )S(O) 2 —, —S(O) 2 N(R A1 )— and —N(R A1 )S(O) 2 N(R B1 )—;

W is selected from —C(O)—, —OC(O)—, —NR A1 C(O)—, —C(═S)—, —S(O) r —, —OS(O) r —, and —N(R A1 )S(O) r —;

Y is CR 6 ;

R 1 is selected from hydrogen, C 1-10 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, heteroaryl-C 1-4 alkyl, wherein alkyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, such as one, two, three or four substituents, independently selected from R X ;

each R 2 is selected from hydrogen, halogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, heteroaryl-C 1-4 alkyl, CN, NO 2 , —NR A2 R B2 , —OR A2 , —C(O)R A2 , —C(═NR E2 )R, —C(═N—OR B2 )R A2 , —C(O)OR A2 , —OC(O)R A2 , —C(O)NR A2 R B2 , —NR A2 C(O)R B2 , —C(═NR E2 )NR A2 R B2 , —NR A2 C(═NR E2 )R B2 , —OC(O)NR A2 R B2 , —NR A2 C(O)OR B2 , —NR A2 C(O)NR A2 R B2 , —NR A2 C(S)NR A2 R B2 , —NR A2 C(═NR E2 )NR A2 R B2 , —S(O) r R A2 , —S(O)(═NR E2 )R B2 , —N═S(O)R A2 R B2 , —S(O) 2 OR A2 , —OS(O) 2 R A2 , —NR A2 S(O) r R B2 , —NR A2 S(O)(═NR E2 )R B2 , —S(O) r NR A2 R B2 , —S(O)(═NR E2 )NR A2 R B2 , —NR A2 S(O) 2 NR A2 R B2 , —NR A2 S(O)(═NR E2 )NR A2 R B2 , —P(O)R A2 R B2 and —P(O)(OR A2 )(OR B2 ), wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

R 3 is selected from hydrogen, halogen, C 1-10 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl and heterocyclyl-C 1-4 alkyl, wherein alkyl, cycloalkyl and heterocyclyl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

R 4 is selected from hydrogen, halogen, C 1-10 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, and heteroaryl-C 1-4 alkyl, wherein alkyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

R 4 is selected from hydrogen, halogen, methoxymethyl, dimethylaminomethyl, C 1-10 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl and heterocyclyl-C 1-4 alkyl, wherein alkyl, cycloalkyl and heterocyclyl, are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

or R 3 and R 4 taken together form a bond;

R 6 is selected from hydrogen, halogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, heteroaryl-C 1-4 alkyl, CN, NO 2 , —NR A3 R B3 , —OR A3 , —C(O)R A3 , —C(═NR E3 )R A3 , —C(═N—OR B3 )R A3 , —C(O)OR A3 , —OC(O)R A3 , —C(O)NR A3 R B3 , —NR A3 C(O)R B3 , —C(═NR E3 )NR A3 R B3 , —NR A3 C(═NR E3 )R B3 , —OC(O)NR A3 R B3 , —NR A3 C(O)OR B3 , —NR A3 C(O)NR A3 R B3 , —NR A3 C(S)NR A3 R B3 , —NR A3 C(═NR E3 )NR A3 R B3 , —S(O) r R A3 , —S(O)(═NR E3 )R B3 , —N═S(O)R A3 R B3 , —S(O) 2 OR A3 , —OS(O) 2 R A3 , —NR A3 S(O) r R B3 , —NR A3 S(O)(═NR E3 )R B3 , —S(O) r NR A3 R B3 , —S(O)(═NR E3 )NR A3 R B3 , —NR A3 S(O) 2 NR A3 R B3 , —NR A3 S(O)(═NR E3 )NR A3 R B3 , —P(O)R A3 R B3 and —P(O)(OR A3 )(OR B3 ), wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

each R A1 , R A2 , R A3 , R B1 , R B2 and R B3 are independently selected from hydrogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, and heteroaryl-C 1-4 alkyl, wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

or each “R A1 and R B1 ”, “R A2 and R B2 ” or “R A3 and R B3 ” together with the atom(s) to which they are attached form a heterocyclic ring of 4 to 12 members containing 0, 1, or 2 additional heteroatoms independently selected from oxygen, sulfur and nitrogen, and optionally substituted with 1 2 or 3 R X groups;

each R C1 and R D1 are independently selected from hydrogen, halogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, and heteroaryl-C 1-4 alkyl, wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R X ;

or R C1 and R D1 together with the carbon atom(s) to which they are attached form a ring of 3 to 12 members containing 0, 1 or 2 heteroatoms independently selected from oxygen, sulfur and nitrogen, and optionally substituted with 1 2 or 3 R X groups;

each R E2 and R E3 are independently selected from hydrogen, C 1-10 alkyl, —CN, —NO 2 , —OR a1 , —SR a1 , —S(O) r R a1 , —C(O)R a1 , —C(O)OR a1 , —C(O)NR a1 R b1 and —S(O) r NR a1 R b1 ;

each R X is independently selected from hydrogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, heteroaryl-C 1-4 alkyl, halogen, —CN, —NO 2 , —(CR c1 R d1 ) t NR a1 R b1 , —(CR c1 R d1 ) t OR b1 , —(CR c1 R d1 ) t C(O)R a1 , —(CR c1 R d1 ) t C(═NR e1 )R a1 , —(CR c1 R d1 ) t C(═N—OR b1 )R a1 , —(CR c1 R d1 ) t C(O)OR b1 , —(CR c1 R d1 ) t OC(O)R b1 , —(CR c1 R d1 ) t C(O)NR a1 R b1 , —(CR c1 R d1 ) t NR a1 C(O)R b1 , —(CR c1 R d1 ) t C(═NR e1 )NR a1 R b1 , —(CR c1 R d1 ) t NR a1 C(═NR e1 )R b1 , —(CR c1 R d1 ) t OC(O)NR a1 R b1 , —(CR c1 R d1 ) t NR a1 C(O)OR b1 , —(CR c1 R d1 ) t NR a1 C(O)NR a1 R b1 , —(CR c1 R d1 ) t NR a1 C(S)NR a1 R b1 , —(CR c1 R d1 ) t NR a1 C(═NR e1 )NR a1 R b1 , —(CR c1 R d1 ) t S(O) r R b1 , —(CR c1 R d1 ) t S(O)(═NR e1 )R b1 , —(CR c1 R d1 ) t N═S(O)R a1 R b1 , —(CR c1 R d1 ) t S(O) 2 OR b1 , —(CR c1 R d1 ) t OS(O) 2 R b1 , —(CR c1 R d1 ) t NR a1 S(O) r R b1 , —(CR c1 R d1 ) t NR a1 S(O)(═NR e1 )R b1 , —(CR c1 R d1 ) t S(O) r NR a1 R b1 , —(CR c1 R d1 ) t S(O)(═NR e1 )NR a1 R b1 , —(CR c1 R d1 ) t NR a1 S(O) 2 NR a1 R b1 , —(CR c1 R d1 ) t NR a1 S(O)(═NR e1 )NR a1 R b1 , —(CR c1 R d1 ) t P(O)R a1 R b1 and —(CR c1 R d1 ) t P(O)(OR a1 )(OR b1 ), wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R Y ;

each R a1 and each R b1 are independently selected from hydrogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl and heteroaryl-C 1-4 alkyl, wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from R Y ;

or R a1 and R b1 together with the atom(s) to which they are attached form a heterocyclic ring of 4 to 12 members containing 0, 1 or 2 additional heteroatoms independently selected from oxygen, sulfur, nitrogen and phosphorus, and optionally substituted with 1, 2 or 3 R Y groups;

each R c1 and each R d1 are independently selected from hydrogen, halogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl and heteroaryl-C 1-4 alkyl, wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, such as one, two, three or four substituents, independently selected from R Y ;

or R c1 and R d1 together with the carbon atom(s) to which they are attached form a ring of 3 to 12 members containing 0, 1 or 2 heteroatoms independently selected from oxygen, sulfur and nitrogen, and optionally substituted with 1, 2 or 3 R Y groups;

each R e1 is independently selected from hydrogen, C 1-10 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, CN, NO 2 , —OR a2 , —SR a2 , —S(O) r R a2 , —C(O)R a2 , —C(O)OR a2 , —S(O) r NR a2 R b2 and —C(O)NR a2 R b2 ;

each R Y is independently selected from C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl, heteroaryl-C 1-4 alkyl, halogen, CN, NO 2 , —(CR c2 R d2 ) t NR a2 R b2 , —(CR c2 R d2 ) t OR b2 , —(CR c2 R d2 ) t C(O)R a2 , —(CR c2 R d2 ) t C(═NR e2 )R a2 , —(CR c2 R d2 ) t C(═N—OR b2 )R a2 , —(CR c2 R d2 ) t C(O)OR b2 , —(CR c2 R d2 ) t OC(O)R b2 , —(CR c2 R d2 ) t C(O)NR a2 R b2 , —(CR c2 R d2 ) t NR a2 C(O)R b2 , —(CR c2 R d2 ) t C(═NR e2 )NR a2 R b2 , —(CR c2 R d2 ) t NR a2 C(═NR e2 )R b2 , —(CR c2 R d2 ) t OC(O)NR a2 R b2 , —(CR c2 R d2 ) t NR a2 C(O)OR b2 , —(CR c2 R d2 ) t NR a2 C(O)NR a2 R b2 , —(CR c2 R d2 ) t NR a2 C(S)NR a2 R b2 , —(CR c2 R d2 ) t NR a2 C(═NR e2 )NR a2 R b2 , —(CR c2 R d2 ) t S(O) r R b2 , —(CR c2 R d2 ) t S(O)(═NR e2 )R b2 , —(CR c2 R d2 ) t N═S(O)R a2 R b2 , —(CR c2 R d2 ) t S(O) 2 OR b2 , —(CR c2 R d2 ) t OS(O) 2 R b2 , —(CR c2 R d2 )NR a2 S(O) r R b2 , —(CR c2 R d2 ) t NR a2 S(O)(═NR e2 )R b2 , —(CR c2 R d2 ) t S(O) r NR a2 R b2 , —(CR c2 R d2 ) S(O)(═NR e2 )NR a2 R b2 , —(CR c2 R d2 ) t NR a2 S(O) 2 NR a2 R b2 , —(CR c2 R d2 ) t NR a2 S(O)(═NR e2 )NR a2 R b2 , —(CR c2 R d2 ) t P(O)R a2 R b2 and —(CR c2 R d2 ) t P(O)(OR a2 )(OR b2 ), wherein alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from OH, CN, amino, halogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, C 1-10 alkylamino, C 3-10 cycloalkylamino and di(C 1-10 alkyl)amino;

each R 2 and each R b2 are independently selected from hydrogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, C 1-10 alkylamino, C 3-10 cycloalkylamino, di(C 1-10 alkyl)amino, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl and heteroaryl-C 1-4 alkyl, wherein alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, cycloalkoxy, alkylthio, cycloalkylthio, alkylamino, cycloalkylamino, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from halogen, —CN, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, —OH, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, amino, C 1-10 alkylamino, C 3-10 cycloalkylamino and di(C 1-10 alkyl)amino;

or R a2 and R b2 together with the atom(s) to which they are attached form a heterocyclic ring of 4 to 12 members containing 0, 1 or 2 additional heteroatoms independently selected from oxygen, sulfur, nitrogen and phosphorus, and optionally substituted with 1 or 2 substituents, independently selected from halogen, —CN, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, —OH, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, amino, C 1-10 alkylamino, C 3-10 cycloalkylamino and di(C 1-10 alkyl)amino;

each R c2 and each R d2 are independently selected from hydrogen, halogen, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, C 1-10 alkylamino, C 3-10 cycloalkylamino, di(C 1-10 alkyl)amino, heterocyclyl, heterocyclyl-C 1-4 alkyl, aryl, aryl-C 1-4 alkyl, heteroaryl and heteroaryl-C 1-4 alkyl, wherein alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, cycloalkoxy, alkylthio, cycloalkylthio, alkylamino, cycloalkylamino, heterocyclyl, aryl and heteroaryl are each unsubstituted or substituted with at least one substituent, independently selected from halogen, —CN, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, —OH, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, amino, C 1-10 alkylamino, C 3-10 cycloalkylamino and di(C 1-10 alkyl)amino;

or R c2 and R d2 together with the carbon atom(s) to which they are attached form a ring of 3 to 12 members containing 0, 1 or 2 heteroatoms independently selected from oxygen, sulfur and nitrogen, and optionally substituted with 1 or 2 substituents, independently selected from halogen, —CN, C 1-10 alkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 cycloalkyl, OH, C 1-10 alkoxy, C 3-10 cycloalkoxy, C 1-10 alkylthio, C 3-10 cycloalkylthio, amino, C 1-10 alkylamino, C 3-10 cycloalkylamino and di(C 1-10 alkyl)amino;

each R e2 is independently selected from hydrogen, CN, NO 2 , C 1-10 alkyl, C 3-10 cycloalkyl, C 3-10 cycloalkyl-C 1-4 alkyl, C 1-10 alkoxy, C 3-10 cycloalkoxy, —C(O)C 1-4 alkyl, —C(O)C 3-10 cycloalkyl, —C(O)OC 1-4 alkyl, —C(O)OC 3-10 cycloalkyl, —C(O)N(C 1-4 alkyl) 2 , —C(O)N(C 3-10 cycloalkyl) 2 , —S(O) 2 C 1-4 alkyl, —S(O) 2 C 3-10 cycloalkyl, —S(O) 2 N(C 1-4 alkyl) 2 and —S(O) 2 N(C 3-10 cycloalkyl) 2 ;

n is selected from 0, 1, 2, 3 and 4;

p is selected from 0, 1 and 2;

each r is independently selected from 1 and 2; and

each t is independently selected from 1, 2, 3 and 4.

2. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein Y is CH.

3. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein L is selected from —O— and —C(O)NH—.

4. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein Ring Q1 is selected from phenyl and pyridinyl, wherein phenyl and pyridinyl are independently unsubstituted or substituted with at least one substituent independently selected from R X .

5. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein the substructure

in Formula (II) is

wherein the symbol indicates the point of attachment to the rest of the molecule.

6. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein R 1 is hydrogen.

7. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein R 2 is hydrogen.

8. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein p is 0.

9. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein Ring Q2 is selected from azetidinyl, pyrrolidinyl and piperidinyl, wherein azetidinyl, pyrrolidinyl and piperidinyl are each independently unsubstituted or substituted with at least one substituent independently selected from R X .

10. A compound of claim 9 or a pharmaceutically acceptable salt thereof, wherein W is —C(O)— and the attachment of W to Q2 is through N.

11. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein R 3 and R 5 are hydrogen.

12. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein R 4 is selected from hydrogen, methoxymethyl, dimethylaminomethyl and azetidinyl, wherein azetidinyl is unsubstituted or substituted with at least one substituent independently selected from R X .

13. A compound of claim 12 or a pharmaceutically acceptable salt thereof, wherein R X is selected from methyl and ethyl.

14. A compound of claim 1 or a pharmaceutically acceptable salt thereof, wherein R 3 and R 4 taken together form a bond, and R 5 is C 1-10 alkyl.

15. A compound of claim 14 or a pharmaceutically acceptable salt thereof, wherein R 5 is methyl.

16. A compound selected from

3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4(3-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4(4-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrroldin-3-yl)-7-amino-1-(4-(4(2,3-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(3,5-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(3-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(4-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,3-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(3,5-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(3-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(4-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,3-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(3,5-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(3-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpiperidin-3-yl)-7-amino-1-(4-(4-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpiperidin-3-yl)-7-amino-1-(4-(2,3-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpiperidin-3-yl)-7-amino-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-3-(1-acryloylpiperidin-3-yl)-7-amino-1-(4-(3,5-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(S))-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(2,6-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(R)-7-amino-3-(1-(but-2-ynoyl)piperidin-3-yl)-1-(4-(3,5-difluorophenoxy)phenyl)-1,5-dihydro-4 H-pyrazolo[3,4-d]pyridazin-4-one,

(S,E)-7-amino-3-(1-(4-methoxybut-2-enoyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[3,4-d]pyridazin-4-one,

(S,E)7-amino-1-(4-(3-fluorophenoxy)phenyl)-3-(1(4-methoxybut-2enoyl)pyrrolidin-3-yl)-1,5dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(S,E)-7-amino-3-(1-(4-dimethylamino)but-2-enoyl)pyrrolidin-3-yl)-1-(4-phenenoxyphenyl)-1,5dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

(S,E)-7-amino-3-(1-(4-dimethylamino)but-2-enoyl)pyrrolidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-azetidin-2-yl)acryloyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-azetidin-2-yl)acryloyl)pyrrolidin-3-yl)-1-(4(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-azetidin-2-yl)acryloyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrazolo[2,3-d]pyridazin-4-one,

7-amino-1-(4-(2-fluorophenoxy)phenyl)-3-((S)-1-((E)-3-((R)-1-methylazetidin-2-yl)acryloyl)pyrrolidin-3-yl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-1-ethylazetidin-2-yl)acryloyl)pyrrolidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-1-ethyl azetidin-2-yl)acryloyl)pyrrolidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S,E)-7-amino-3-(1-(4-methoxybut-2-enoyl)piperidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S,E)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-3-(1-(4-methoxybut-2-enoyl)piperidin-3-yl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S,E)-7-amino-3-(1-(4-(dimethylamino)but-2-enoyl)piperidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S,E)-7-amino-3-(1-(4-(dimethylamino)but-2-enoyl)piperidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-azetidin-2-yl)acryloyl)piperidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-azetidin-2-yl)acryloyl)piperidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-1-methylazetidin-2-yl)acryloyl)piperidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-1-(4-(2-fluorophenoxy)phenyl)-3-((S)-1-((E)-3-((R)-1-methylazetidin-2-yl)acryloyl)piperidin-3-yl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-1-ethylazetidin-2-yl)acryloyl)piperidin-3-yl)-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

7-amino-3-((S)-1-((E)-3-((R)-1-ethyl azetidin-2-yl)acryloyl)piperidin-3-yl)-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

3-(1-acryloylazetidin-3-yl)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

3-(1-acryloylpiperidin-4-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

3-(1-acryloylpiperidin-4-yl)-7-amino-1-(4-(2-fluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

3-(1-acryloylazetidin-3-yl)-7-amino-1-(4-phenoxyphenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2,5-difluorophenoxy)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-3-(1-acryloylpyrrolidin-3-yl)-7-amino-1-(4-(2-fluorophenoxy-3-d)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

(S)-7-amino-3-(1-(but-2-ynoyl)pyrrolidin-3-yl)-1-(4-(2-fluorophenoxy-3-d)phenyl)-1,5-dihydro-4H-pyrrolo[2,3-d]pyridazin-4-one,

and pharmaceutically acceptable salts thereof.

17. A pharmaceutical composition, comprising a compound of claim 1 , or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable carrier.

18. A pharmaceutical composition, comprising a compound of claim 16 , or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable carrier.