Thienopyrimidinone derivatives as mGluR1 antagonists

1. A compound represented by Formula 1:

wherein R1 represents an aryl group, R2 represents an alkyl or aryl group, and R3 represents a hydrogen atom, an alkyl group, or an alkylamine group.

2. The compound or pharmaceutically acceptable salt thereof according to claim 1 , wherein R1 is selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthalenyl, and substituted or unsubstituted benzodioxolyl; the substituted phenyl is phenyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, substituted or unsubstituted stannyl, and phenyl; the substituted stannyl is alkylstannyl substituted with one to three C 1 -C 7 alkyl groups; the substituted naphthalenyl is naphthalenyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, C 1 -C 7 alkoxy, unsubstituted stannyl, C 1 -C 7 alkylstannyl, C 1 -C 7 dialkylstannyl, C 1 -C 7 trialkylstannyl, and phenyl; and the substituted benzodioxolyl is benzodioxolyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, C 1 -C 7 alkoxy, unsubstituted stannyl, C 1 -C 7 alkylstannyl, C 1 -C 7 dialkylstannyl, C 1 -C 7 trialkylstannyl, and phenyl.

3. The compound or pharmaceutically acceptable salt thereof according to claim 1 , wherein (i) R2 is selected from substituted or unsubstituted phenyl, substituted or unsubstituted benzonitrile, substituted or unsubstituted C 1 -C 7 alkyl, allyl, vinyl, substituted or unsubstituted C 3 -C 10 cycloalkyl, substituted or unsubstituted pyranyl, substituted or unsubstituted hydropyranyl, substituted or unsubstituted naphthalenyl, substituted or unsubstituted hydronaphthalenyl, substituted or unsubstituted furanyl, substituted or unsubstituted hydrofuranyl, substituted or unsubstituted piperidinyl, and substituted or unsubstituted C 3 -C 10 heterocycloalkyl; or (ii) R2 has a C 1 -C 7 alkyl group through which a group selected from substituted or unsubstituted phenyl, substituted or unsubstituted benzonitrile, substituted or unsubstituted C 1 -C 7 alkyl, allyl, vinyl, substituted or unsubstituted C 3 -C 10 cycloalkyl, substituted or unsubstituted pyranyl, substituted or unsubstituted hydropyranyl, substituted or unsubstituted naphthalenyl, substituted or unsubstituted hydronaphthalenyl, substituted or unsubstituted furanyl, substituted or unsubstituted hydrofuranyl, substituted or unsubstituted piperidinyl, and substituted or unsubstituted C 3 -C 10 heterocycloalkyl is linked to the corresponding nitrogen atom of the thienopyrimidinone ring; the substituted phenyl is phenyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the substituted benzonitrile is benzonitrile in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the substituted C 1 -C 7 alkyl is C 1 -C 7 alkyl in which one to three hydrogen atoms of the alkyl are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, allyl, C 3 -C 10 cycloalkyl, furanyl, and hydrofuranyl; the substituted C 3 -C 10 cycloalkyl is C 3 -C 10 cycloalkyl substituted with substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, allyl, and C 1 -C 7 alkyl; the substituted pyranyl is pyranyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the hydropyranyl is dihydropyranyl or tetrahydropyranyl; the substituted hydropyranyl is hydropyranyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the substituted naphthalenyl is naphthalenyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the hydronaphthalenyl is selected from dihydronaphthalenyl, tetrahydronaphthalenyl, hexahydronaphthalenyl, and heptahydronaphthalenyl; the substituted hydronaphthalenyl is hydronaphthalenyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the substituted furanyl is furanyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the hydrofuranyl is dihydrofuranyl or tetrahydrofuranyl; the substituted hydrofuranyl is hydrofuranyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl; the substituted piperidinyl is (i) piperidinyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl, or (ii) piperidinyl in which a substituent selected from C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, vinyl, and allyl is bonded to the nitrogen atom of the piperidine ring; the C 3 -C 10 heterocycloalkyl is heterocycloalkyl in which one or two heteroatoms selected from N, O and S, and three to ten carbon atoms are bonded together to form a ring; and the substituted C 3 -C 10 heterocycloalkyl is heterocycloalkyl in which some or all of the hydrogen atoms are replaced by substituents selected from halogen, C 1 -C 7 alkyl, halogenated C 1 -C 7 alkyl, C 1 -C 7 alkoxy, halogenated C 1 -C 7 alkoxy, hydroxy, nitro, vinyl, and allyl.

4. The compound or pharmaceutically acceptable salt thereof according to claim 1 , wherein R3 is selected from hydrogen, C 1 -C 7 alkyl, and substituted or unsubstituted amino, the substituted amino in R3 being amino substituted with one or two C 1 -C 7 alkyl groups; and R3′ is oxygen.

5. The compound or pharmaceutically acceptable salt thereof according to claim 1 , wherein R1 is selected from phenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2bromophenyl, 3-bromophenyl, 4-bromophenyl, 2-iodophenyl, 3-iodophenyl, 4-iodophenyl, 2-trimethylstannylphenyl, 3-trimethylstannylphenyl, 4-trimethylstannylphenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 3,4-dimethoxyphenyl, 4-benzodioxolyl, 5-benzodioxolyl, 1-naphthalenyl, and 2-naphthalenyl; R2 is selected from phenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2-bromophenyl, 3-bromophenyl, 4-bromophenyl, 2-iodophenyl, 3-iodophenyl, 4-iodophenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 3,4-dimethoxyphenyl, 3,5-dimethoxyphenyl, 2-hydroxyphenyl, 3-hydroxyphenyl, 4-hydroxyphenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2,5-dimethylphenyl, 2,6-dimethylphenyl, 3,4-dimethylphenyl, benzonitrile, 2-trifluoromethylphenyl, 3-trifluoromethylphenyl, 4-trifluoromethylphenyl, 2-trifluoromethoxyphenyl, 3-trifluoromethoxyphenyl, 4-trifluoromethoxyphenyl, 2-nitrophenyl, 3-nitrophenyl, 4-nitrophenyl, 2-vinylphenyl, 3-vinylphenyl, 4-vinylphenyl, butyl, allyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclooctyl, cyclopropylmethyl, cyclohexylmethyl, 4-methylcyclohexyl, tetrahydropyran-4-yl, 1,2,3,4-tetrahydronaphthalen-1-yl, tetrahydrofuran-2-ylmethyl, 1-methylpiperidin-4-yl, isobutyl, neopentyl, 2-methylcyclohexyl, 3-methylcyclohexyl, 4-ethylcyclohexyl, and acetyloxy; and R3 is selected from hydrogen, methyl, and dimethylamino.

6. A compound or pharmaceutically acceptable salt thereof, wherein the compound is any one of the following compounds:

3,7-diphenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(2-fluorophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3-fluorophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-fluorophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(2-chlorophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3-chlorophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3-bromophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-bromophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(2-methoxyphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3-methoxyphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3,4-dimethoxyphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3,5-dimethoxyphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-hydroxyphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(o-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(m-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-p-tolylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-ethylphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(2,6-dimethylphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(2,5-dimethylphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3,4-dimethylphenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-oxo-7-phenylthieno[3,2-d]pyrimidin-3(4H)-yl)benzonitrile;

4-(4-oxo-7-phenylthieno[3,2-d]pyrimidin-3(4H)-yl)benzonitrile;

7-phenyl-3-(3-trifluoromethyl)phenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(4-(trifluoromethyl)phenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(4-trifluoromethoxy)phenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-nitrophenyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(3-vinylphenyl)thieno[3,2-d]-pyrimidin-4(3H)-one;

7-phenyl-3-(4-vinylphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-fluorophenyl)-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-(4-hydroxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-(3-hydroxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-(m-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(3-chlorophenyl)-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-(3-vinylphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(7-(2-fluorophenyl)-4-oxothieno[3,2-d]pyrimidin-3(4H)-yl)benzonitrile;

3-(4-chlorophenyl)-7-(3-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(3-fluorophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(4-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(4-fluorophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-chlorophenyl)-3-(4-chlorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-chlorophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(3-chlorophenyl)-3-(4-chlorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(3-chlorophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3,7-bis(4-chlorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(4-chlorophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-bromophenyl)-3-(4-chlorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-bromophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-iodophenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-(2-(trimethylstannyl)phenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(o-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-(o-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(m-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-(m-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(p-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-(p-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(2-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-methoxyphenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(3-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(3-methoxyphenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3,7-bis(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(3,4-dimethoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(3,4-dimethoxyphenyl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(benzo[d][1,3]dioxol-5-yl)-3-(4-chlorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(benzo[d][1,3]dioxol-5-yl)-3-(4-methoxyphenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(naphthalen-1-yl)-3,4-dihydrothieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-(naphthalen-1-yl)-3,4-dihydrothieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-(naphthalen-2-yl)-3,4-dihydrothieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-7-(naphthalen-2-yl)-3,4-dihydrothieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-methoxyphenyl)-2-methyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-chlorophenyl)-7-phenylthieno[3,2-d]pyrimidin-2,4(1H,3H)-dione;

3-(4-chlorophenyl)-2-(dimethylamino)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-butyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-allyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclobutyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclopentyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclohexyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclooctyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(cyclopropylmethyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(cyclohexylmethyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-((1R,4R)-4-methylcyclohexyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(tetrahydro-2H-pyran-4-yl)thieno[3,2-d]pyrimidin-4(3H)-one;

(R)-7-phenyl-3-(1,2,3,4-tetrahydronaphthalen-1-yl)thieno[3,2-d]pyrimidin-4(3H)-one;

(S)-7-phenyl-3-(1,2,3,4-tetrahydronaphthalen-1-yl)thieno[3,2-d]pyrimidin-4(3H)-one;

(S)-7-phenyl-3-((tetrahydrofuran-2-yl)methyl)thieno[3,2-d]pyrimidin-4(3H)-one;

(R)-7-phenyl-3-((tetrahydrofuran-2-yl)methyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(1-methylpiperidin-4-yl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-isobutyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-neopentyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(2-methylcyclohexyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(3-methylcyclohexyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-ethylcyclohexyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

(1R,4R)-4-(4-oxo-7-phenylthieno[3,2-d]pyrimidin-3(4H)-yl)cyclohexyl acetate;

3-butyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-allyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclobutyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclopentyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclohexyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclooctyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(cyclopropylmethyl)-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(cyclohexanemethyl)-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-((1R,4R)-4-methylcyclohexyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-cycloheptyl-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-cycloheptyl-7-(2-fluorophenyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(2,3-dihydro-1H-inden-2-yl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-isopropylcyclohexyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

7-phenyl-3-(4-propylcyclohexyl)thieno[3,2-d]pyrimidin-4(3H)-one;

3-(4-(tert-butyl)cyclohexyl)-7-phenylthieno[3,2-d]pyrimidin-4(3H)-one;

(1r,4r)-4-(7-(2-fluorophenyl)-4-oxothieno[3,2-d]pyrimidin-3(4H)-yl)cyclohexyl acetate;

7-(2-fluorophenyl)-3-isobutylthieno[3,2-d]pyrimidin-4(3H)-one;

7-(2-fluorophenyl)-3-neopentylthieno[3,2-d]pyrimidin-4(3H)-one;

3-cyclooctyl-7-(o-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one; and

3-cycloheptyl-7-(o-tolyl)thieno[3,2-d]pyrimidin-4(3H)-one.

7. A pharmaceutical composition for treating a brain disease, comprising the compound or pharmaceutically acceptable salt thereof according to claim 2 as an active ingredient.

8. A pharmaceutical composition for treating a brain disease, comprising the compound or pharmaceutically acceptable salt thereof according to claim 3 as an active ingredient.

9. A pharmaceutical composition for treating a brain disease, comprising the compound or pharmaceutically acceptable salt thereof according to claim 4 as an active ingredient.

10. A pharmaceutical composition for treating a brain disease, comprising the compound or pharmaceutically acceptable salt thereof according to claim 5 as an active ingredient.

11. A pharmaceutical composition for treating a brain disease, comprising the compound or pharmaceutically acceptable salt thereof according to claim 6 as an active ingredient.

12. A method for preparing the thienopyrimidinone derivative of Formula 1:

wherein R1 is selected from phenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2-bromophenyl, 3-bromophenyl, 4-bromophenyl, 2-iodophenyl, 3-iodophenyl, 4-iodophenyl, 2-trimethylstannylphenyl, 3-trimethylstannylphenyl, 4-trimethylstannylphenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 3,4-dimethoxyphenyl, 4-benzodioxolyl, 5-benzodioxolyl, 1-naphthalenyl, and 2-naphthalenyl;

R2 is selected from phenyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2-bromophenyl, 3bromophenyl, 4-bromophenyl, 2-iodophenyl, 3-iodophenyl, 4-iodophenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 3,4-dimethoxyphenyl, 3,5-dimethoxyphenyl, 2-hydroxyphenyl, 3-hydroxyphenyl, 4-hydroxyphenyl, 2-methylphenyl, 3-methylphenyl, 4-methylphenyl, 2,5-dimethylphenyl, 2,6-dimethylphenyl, 3,4-dimethylphenyl, benzonitrile, 2-trifluoromethylphenyl, 3-trifluoromethylphenyl, 4-trifluoromethylphenyl, 2-trifluoromethoxyphenyl, 3-trifluoromethoxyphenyl, 4-trifluoromethoxyphenyl, 2-nitrophenyl, 3-nitrophenyl, 4-nitrophenyl, 2-vinylphenyl, 3-vinylphenyl, 4-vinylphenyl, butyl, allyl, cyclobutyl, cyclopentyl, cyclohexyl, cyclooctyl, cyclopropylmethyl, cyclohexylmethyl, 4-methylcyclohexyl, tetrahydropyran-4-yl, 1,2,3,4-tetrahydronaphthalen-1-yl, tetrahydrofuran-2-ylmethyl, 1-methylpiperidin-4-yl, isobutyl, neopentyl, 2-methylcyclohexyl, 3-methylcyclohexyl, 4-ethylcyclohexyl, and acetyloxy; and R3 is selected from hydrogen, methyl, and dimethylamino,

the method comprising:

(a) formylating an aryl acetonitrile 2 to afford an aryl hydroxyacrylonitrile 3;

(b) methylating the compound 3 to afford an aryl methoxyacrylonitrile 4;

(c) forming a thiophene ring from the aryl methoxyacrylonitrile to synthesize a thiophene derivative 5; and

(d) synthesizing the thienopyrimidinone derivative 1 from the thiophene derivative, as depicted in Reaction Scheme 1:

13. The method according to claim 12 , wherein, in step (d), (i) the compound 1 is directly synthesized from the thiophene derivative, (ii) the thiophene derivative is amidated to synthesize a compound 6 and a pyrimidinone ring is formed to synthesize the compound 1, or (iii) the thiophene derivative is reacted with an isocyanate to synthesize a thienopyrimidinedione derivative 7 and an amine is introduced to prepare the compound 1.