Claims for Patent: 5,614,520

Summary for Patent: 5,614,520

Title:	2-arylthiazole derivatives and pharmaceutical composition thereof
Abstract:	Pharmaceutical compositions for treating gout or hyperuricemia and containing a new categorized compound, i.e. 2-arylthiazole derivatives, as an active ingredient, are provided. The 2-arylthiazole derivatives in the present invention are represented by the following formula (I): ##STR1## wherein Ar is an unsubstituted or substituted pyridyl, thienyl, furyl, naphthyl or phenyl group; X is a hydrogen atom, alkyl group or carboxyl group which may be protected, and Y is a hydrogen atom, alkyl group, or a hydroxyl or carbonyl group which may be protected. Furthermore, novel compounds included in the 2-arylthiazole derivatives and pharmaceutically acceptable salts thereof are provided.
Inventor(s):	Kondo; Shiro (Hachioji, JP), Fukushima; Hisashi (Hino, JP), Hasegawa; Masaichi (Hino, JP), Tsuchimoto; Masahiro (Hino, JP), Nagata; Ikuo (Hino, JP), Osada; Yoshio (Hino, JP), Komoriya; Keiji (Hachioji, JP), Yamaguchi; Hisao (Hino, JP)
Assignee:	Teijin Limited (Osaka, JP)
Application Number:	08/380,214
Patent Claims:	1. A 2-arylthiazole derivative having the following formula (I), and a pharmaceutically acceptable salt thereof: ##STR71## wherein Ar is an unsubstituted or substituted furyl group; or a group represented by the following formula (II): ##STR72## wherein R.sub.1, R.sub.2, and R.sub.3 are hydrogen, a halogen atom, or a nitro, cyano or formyl group; or a group of OR, S(O).sub.n R and NRR.sup.1 (wherein n is an integer of from 1 to 2, R represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, R.sup.1 represents a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R.sup.1, taken together with the nitrogen atom bonded thereto, represent atoms forming an unsubstituted or substituted 5- or 7-membered heterocyclic ring), or a group of COR" wherein R" represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl or aralkyl group; a hydroxyl group; an unsubstituted or substituted C.sub.1-10 alkoxy, aryloxy or aralkyloxy group; an amino group; or an unsubstituted or substituted C.sub.1-10 alkyl (mono- or di-substituted, independently) amino, aryl (mono- or di-substituted, independently) amino or aralkyl (mono- or di-substituted, independently) amino group, or a 5- to 7-membered cyclic amino group, and at least one of R.sub.1, R.sub.2 or R.sub.3 is other than hydrogen; X is a hydrogen atom, or a C.sub.1-14 alkyl, carboxyl, C.sub.1-5 alkoxycarbonyl, carbamoyl or C.sub.1-4 alkyl (mono- or di-substituted) aminocarbonyl group; and Y represents a hydrogen atom or a C.sub.1-4 alkyl, carboxyl, C.sub.1-5 alkoxycarbonyl, carbamoyl or C.sub.1-4 alkyl (mono- or di-substituted) aminocarbonyl group, with the proviso that when at least one group of R.sub.1, R.sub.2 and R.sub.3 represents a halogen atom, or an alkoxy, alkylamino or nitro group, at least one group of the two other groups represents a group other than a hydrogen atom; when at least one group of R.sub.1, R.sub.2 and R.sub.3 is a halogen atom and another group is a hydrogen atom, a remaining group is a group other than a halogen atom, or an alkoxy, alkylamino or acylamino group, with the additional proviso that when any one of R.sub.1, R.sub.2 or R.sub.3 is OR, one of the remaining groups cannot represent hydrogen while the other group represents OR, or the remaining two groups cannot both represent OR at the same time, nor do all of R.sub.1 -R.sub.3 represent halogen; with the further proviso that both X and Y do not represent carboxyl, C.sub.1-5 alkoxycarbonyl, carbamoyl or C.sub.1-4 alkyl (a mono- or di-substituted) aminocarbonyl group at the same time. 2. A 2-arylthiazole derivative of the formula (I) and a pharmaceutically acceptable salt thereof in accordance with claim 1 wherein Ar represents a group of the formula (II), and R.sub.1 is a halogen atom, or a nitro, cyano or formyl group, R.sub.2 is a member of the group consisting of OR, S(O).sub.n R and NRR' wherein n is an integer of from 0 to 2, R represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, R.sup.1 represents a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R.sup.1 taken together with the nitrogen atom bonded thereto, represent atoms forming an unsubstituted or substituted 5- to 7-membered heterocyclic ring), and R.sub.3 represents a hydrogen or halogen atom. 3. A 2-arylthiazole derivative and a pharmaceutically acceptable salt thereof in accordance with claim 2, wherein X is a carboxyl, C.sub.1-5 alkoxy-carbonyl, carbamoyl or C.sub.1-4 alkyl (mono- or di-substituted) aminocarbonyl group; and Y is a hydrogen atom, or a C.sub.1-4 alkyl group. 4. A 2-arylthiazole derivative of the formula (I) and a pharmaceutically acceptable salt thereof, in accordance with claim 1, wherein Ar represents a group of the formula (II), and R.sub.1 represents an m-nitro or m-cyano group, R.sub.2 represents a member of the group consisting of OR, S(O).sub.n R and NRR' wherein n is an integer of from 0 to 2, R represents an unsubstituted or substituted alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, R' represents a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R', taken together with the nitrogen atom bonded thereto, represent atoms forming an unsubstituted or substituted 5- to 7-membered heteroxyclic ring, and R.sub.3 represents a hydrogen atom; X represents a carboxyl, C.sub.1-5 alkoxycarbonyl, carbamoyl or C.sub.1-4 alkyl (mono-or di-substituted aminocarbonyl group; and Y represents a hydrogen atom, or a C.sub.1-4 alkyl group. 5. A 2-arylthiazole derivative of the formula (I) and a pharmaceutically acceptable salt thereof in accordance with claim 1 wherein Ar represents a group of the formula (II), and R.sup.1 represents an m-halogen atom, R.sub.2 represents a member of the group consisting of OR, S(O).sub.n R and NRR' wherein n is an integer of from 0 to 2, R represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, R' represents a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R', taken together with the nitrogen atom bonded thereto, represent atoms forming an unsubstituted or substituted 5-to 7-membered heterocyclic ring, and R.sub.3 represents a hydrogen or halogen atom. 6. A 2-arylthiazole derivative of the formula (I) and a pharmaceutically acceptable salt thereof in accordance with claim 1, wherein Ar represents a group of the formula (II), and R.sub.1 represents an m-halogen atom, R.sub.2 represents a group of OR, S(O).sub.n R and NRR' wherein n is an integer of from 0 to 2, R represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, R' represents a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R', taken together with the nitrogen atom bonded thereto, represent atoms forming an unsubstituted or substituted 5- to 7-membered heterocyclic ring, and R.sub.3 represents a hydrogen or halogen atom; X represents a carboxyl, C.sub.1-5 alkoxycarbonyl, carbamoyl or C.sub.1-4 alkyl (mono- or di-substituted)-aminocarbonyl group; and Y represents a C.sub.1-4 alkyl group. 7. A 2-arylthiazole derivative of the following formula (I-a) and a pharmaceutically acceptable salt thereof in accordance with claim 1: ##STR73## wherein R.sub.1-a is a C.sub.2-8, alkoxy group and R.sub.2-a is a nitro group; R.sub.1-a is a morpholino, 4-N-methylpiperazine-1-yl or piperidino group and R.sub.2-a is a nitro group; R.sub.1-a is a morpholino, 4-N-methylpiperazine-1-yl or piperidino group and R.sub.2-a is a cyano group; R.sub.1-a is a C.sub.2-8 alkoxy group and R.sub.2-a is a cyano group; or R.sub.1-a is an unsubstituted benzoyl group or a benzoyl group substituted by one or two groups selected from the group consisting of a methyl group, chlorine atom or methoxy group, and R.sub.2-a is a hydrogen atom. 8. An 2-arylthiazole derivative of the following formula (I-b) and a pharmaceutically acceptable salt thereof in accordance with claim 2: ##STR74## wherein R.sub.1-b is OR or SR group wherein R represents a C.sub.2-8 alkyl, morpholino, 4-N-methyl piperazine-1-yl or piperidino group; R.sub.2-b represents a nitro, trifluoromethyl or cyano group, and Y.sub.b represents a hydrogen atom or a methyl group; or R.sub.1-b represents a group of the formula ##STR75## wherein R.sub.3-b represents an unsubstituted or substituted phenyl group and R.sub.4-b represents a hydroen atom or a methyl group. 9. The 2-arylthiazole derivative of claim 1 wherein when X represents a carboxyl group, Y represents a hydrogen atom or a C.sub.1-4 alkyl group. 10. A 2-arylthiazole derivative having the following formula (I), and a pharmaceutically acceptable salt thereof: ##STR76## wherein Ar represents a group of the formula (II) ##STR77## wherein R.sub.1 represents COR" wherein R" represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl or aralkyl group; wherein at least one member of the group of R.sub.2 and R.sub.3 is a hydrogen, a halogen atom, or a nitro, cyano or formyl group; or a member selected from the group consisting of OR, S(O).sub.n R and NRR.sup.1 wherein n is an integer of 1 to 2, R represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, R.sup.1 represents a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R.sup.1 taken together with the nitrogen atom bonded thereto, represent atoms forming an unsubstituted or substituted 5- to 7-membered heterocyclic ring or COR" wherein R" represents an unsubstituted or substituted C.sub.1-10 alkyl, aryl or aralkyl group; a hydroxyl group; an unsubstituted or substituted C.sub.1-10 alkoxy, aryloxy or aralkyloxy group; an amino group; or an unsubstituted or substituted C.sub.1-10 alkyl (mono- or disubstituted) amino, aryl (mono- or di-substituted) amino or aralkyl (mono-or di-substituted) amino group, or a 5- to 7-membered cyclic amino group; X represents a carboxyl, C.sup.1-5 alkoxycarbonyl carbamoyl or C.sub.1-4 alkyl (mono- or di-substituted) aminocarbonyl group; and y represents a hydrogen atom, or a C.sub.1-4 alkyl group. 11. A pharmaceutical composition comprising an effective amount of the 2-arylthiazole derivative of claim 1. 12. A pharmaceutical composition in accordance with claim 11 wherein Ar is a group of the formula (II), and at least one group of R.sub.1, R.sub.2 and R.sub.3 is a halogen atom, or a nitro, cyano or formyl group; or a group of OR, S(O).sub.n R or NRR' (wherein n is an integer of from 0 to 2, R is an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group, and R' is a hydrogen atom, or an unsubstituted or substituted C.sub.1-10 alkyl, aryl, aralkyl, alkylcarbonyl, arylcarbonyl or aralkylcarbonyl group; or R and R' taken together with the nitrogen atom bonded thereto, are atoms forming an unsubstituted or substituted 5- to 7- membered heterocylic ring), or a group of COR" (wherein R" is an unsubstituted or substituted C.sub.1-10 alkyl, aryl or aralkyl group, a hydroxyl group, an unsubstituted or substituted C.sub.1-10 alkoxy, aryloxy or aralkyloxy group, an amino group, or an unsubstituted or substituted C.sub.1-10 alkyl (mono- or di-substituted, independently) amino, aryl (mono- or di-substituted, independently) amino or aralky (mono- or di-substituted, independently) amino group, or a 5- to 7- membered cyclic amino group); X is a carboxyl, C.sub.1-5 alkoxycarbonyl, carbamoyl or C.sub.1-4 alkyl (mono- or di-substituted) aminocarbonyl group. 13. The pharmaceutical composition of claim 11 wherein when X represents a carboxyl group, Y represents a hydrogen atom or a C.sub.1-4 alkyl group. 14. A pharmaceutical composition comprising an effective amount of the 2-arylthiazole derivative of claim 10. 15. A method for treating a patient afflicted with gout or hyperuricemia which comprises administering to said patient a uric acid-lowering effective amount of the pharmaceutical composition of claim 11.