Methods and compositions associated with the granulocyte colony-stimulating factor receptor

1. A compound of Formula (III):

a tautomer thereof, or a pharmaceutically acceptable salt thereof,

wherein:

R 1 is selected from hydrogen, OR 6 , NO 2 , CN, NR 6 R 7 , CO 2 R 6 , C(═O)NR 6 R 7 , SO 3 R 6 , SO 2 NR 6 R 8 , an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 2 -C 6 alkenyl, an optionally substituted C 2 -C 6 alkynyl, an optionally substituted C 1 -C 6 heteroalkyl, an optionally substituted C 3 -C 6 cycloalkyl, an optionally substituted C 3 -C 6 cycloalkenyl, an optionally substituted C 2 -C 6 heterocyclyl, an optionally substituted arylalkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 2 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 2 -C 6 alkenyl, an optionally substituted C 2 -C 6 alkynyl, an optionally substituted C 1 -C 6 heteroalkyl, an optionally substituted C 3 -C 8 cycloalkyl, an optionally substituted C 3 -C 8 cycloalkenyl, an optionally substituted C 1 -C 6 heterocycle, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 4 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 2 -C 6 alkenyl, an optionally substituted C 2 -C 6 alkynyl, an optionally substituted C 1 -C 6 heteroalkyl, an optionally substituted C 3 -C 8 cycloalkyl, an optionally substituted C 3 -C 8 cycloalkenyl, an optionally substituted C 1 -C 6 heterocycle, an optionally substituted aryl, an optionally substituted heteroaryl, an optionally substituted arylalkyl, an optionally substituted arylalkenyl, an optionally substituted arylalkynyl, and an optionally substituted heteroarylalkyl;

R 5 is selected from NO 2 , CN, CF 3 , OR 6 , CO 2 R 6 , C(═O)NR 6 R 7 , SO 3 R 6 , and SO 2 NR 6 R 8 , an optionally substituted aryl, an optionally substituted C 1 -C 6 alkyl, and an optionally substituted C 1 -C 6 heteroalkyl;

R 6 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, a C 1 -C 6 heteroalkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 7 is selected from hydrogen, C(═O)R 8 , C(═O)NHR 8 , an optionally substituted C 1 -C 6 alkyl, and an optionally substituted C 1 -C 6 heteroalkyl; or —NR 6 R 7 is an optionally substituted non-aromatic heterocycle linked through a ring nitrogen;

R 8 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, and an optionally substituted C 1 -C 6 heteroalkyl;

Q is selected from the group consisting of NR 6 , an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 3 -C 8 cycloalkyl, an optionally substituted C 1 -C 6 heteroalkyl, and an optionally substituted non-aromatic heterocycle;

L 1 is NH;

Z is O (oxygen);

n is 1, 2 or 3; and

with the proviso that if R 2 is methyl, R 4 is phenyl, and Q is N-Ph-R 1 in Formula III, R 1 of Formula III is not selected from the group of halogen, alkyl, substituted alkyl, carboxylic acid, and carboxylic esters.

2. The compound of claim 1 having the structure of Formula (IIIa):

a tautomer thereof, or a pharmaceutically acceptable salt thereof,

wherein:

R 1 is selected from hydrogen, OR 6 , NR 6 R 7 , CO 2 R 6 , C(═O)NR 6 R 7 , an optionally substituted C 2 -C 6 heterocyclyl, an optionally substituted arylalkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 2 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 3 -C 8 cycloalkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 4 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted aryl, an optionally substituted heteroaryl, an optionally substituted arylalkyl, and an optionally substituted heteroarylalkyl;

R 5 is selected from CN, CF 3 , OR 6 , an optionally substituted aryl, and an optionally substituted C 1 -C 6 alkyl;

R 6 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 7 is selected from hydrogen, C(═O)R 8 , C(═O)NHR 8 , and an optionally substituted C 1 -C 6 alkyl; or —NR 6 R 7 is an optionally substituted non-aromatic heterocycle linked through a ring nitrogen;

R 8 is selected from hydrogen, and an optionally substituted C 1 -C 6 alkyl;

Q is selected from NR 6 , an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 3 -C 8 cycloalkyl, and an optionally substituted non-aromatic heterocyclyl;

Z is O (oxygen); and

n is 1, or 2.

3. The compound of claim 2 , wherein:

R 1 is selected from hydrogen, OR 6 , NR 6 R 7 , CO 2 R 6 , C(═O)NR 6 R 7 , an optionally substituted C 2 -C 6 heterocyclyl, an optionally substituted arylalkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 2 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted C 3 -C 8 cycloalkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 4 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted aryl, an optionally substituted heteroaryl, an optionally substituted arylalkyl, and an optionally substituted heteroarylalkyl;

R 5 is selected from CN, CF 3 , OR 6 , an optionally substituted aryl, and an optionally substituted C 1 -C 6 alkyl;

R 6 is selected from hydrogen, and an optionally substituted C 1 -C 6 alkyl;

R 7 is selected from hydrogen, C(═O)R 8 , C(═O)NHR 8 , and an optionally substituted C 1 -C 6 alkyl;

R 8 is selected from hydrogen, and an optionally substituted C 1 -C 6 alkyl;

Q is selected from NR 6 , an optionally substituted C 1 -C 4 alkyl, an optionally substituted C 3 -C 6 cycloalkyl, and an optionally substituted non-aromatic heterocyclyl;

Z is O (oxygen); and

n is 1.

4. The compound of claim 3 , wherein:

R 1 is selected from hydrogen, OR 6 , NR 6 R 7 , C(═O)NR 6 R 7 , an optionally substituted arylalkyl, and an optionally substituted heteroaryl;

R 2 is selected from hydrogen, an optionally substituted C 1 -C 6 alkyl, an optionally substituted aryl, and an optionally substituted heteroaryl;

R 4 is an optionally substituted aryl;

R 5 is selected from CN, CF 3 , OR 6 , an optionally substituted aryl, and an optionally substituted C 1 -C 6 alkyl;

R 6 is selected from hydrogen, and an optionally substituted C 1 -C 3 alkyl;

R 7 is selected from hydrogen, C(═O)R 8 , C(═O)NHR 8 , and an optionally substituted C 1 -C 3 alkyl;

R 8 is selected from hydrogen, and an optionally substituted C 1 -C 3 alkyl; and

Q is selected from optionally substituted C 1 -C 3 alkyl, an optionally substituted C 3 -C 6 cycloalkyl, and an optionally substituted non-aromatic heterocyclyl.

5. The compound of claim 1 , wherein the compound is a GCSF receptor agonist or a GCSF receptor partial agonist.

6. A pharmaceutical composition comprising a compound of claim 1 and a pharmaceutically acceptable excipient.

7. A method of treating a hematopoietic or neurological disorder comprising administering an effective amount of a compound of claim 1 to a subject in need thereof, wherein the disorder is selected from the group consisting of granulocytopenia, neutropenia, amyotrophic lateral sclerosis, multiple sclerosis, multiple dystrophy, and spinal cord injury.

8. The method of claim 7 , wherein the compound is administered in combination with an additional therapeutic regimen selected from the group consisting of chemotherapy, bone marrow transplantation, and radiation therapy.

9. A compound selected from the group consisting of:

a tautomer thereof, or pharmaceutically acceptable salt thereof.

10. A pharmaceutical composition comprising a compound of claim 9 and a pharmaceutically acceptable excipient.

11. A method of treating a hematopoietic or neurological disorder comprising administering an effective amount of a compound of claim 9 to a subject in need thereof, wherein the disorder is selected from the group consisting of granulocytopenia, neutropenia, amyotrophic lateral sclerosis, multiple sclerosis, multiple dystrophy, and spinal cord injury.

12. The compound of claim 1 having the structure: