Abstract: The present invention relates to a compound represented by Formula (I): (wherein Ar1 represents an imidazolyl group which may be substituted with 1 to 3 substituents; Ar2 represents a pyridinyl group, a pyrimidinyl group, or a phenyl group which may be substituted with 1 to 3 substituents; X1 represents (1) —C?C— or (2) a double bond etc. which may be substituted; R1 and R2 represent, for example, a C1-6 alkyl group or C3-8 cycloalkyl group which may be substituted) or a pharmacologically acceptable salt thereof and to the use thereof as pharmaceutical agents.

Abstract: Disclosed is a compound represented by the formula (I): or a pharmacologically acceptable salt thereof, which is effective as a therapeutic or prophylactic agent for a disease induced by A?, wherein Ar1 represents an imidazolyl group which may be substituted with a C1-6 alkyl group, or the like; Ar2 represents a phenyl group which may be substituted with a C1-6 alkoxy group, or the like; X1 represents a double bond, or the like; and Het represents a triazolyl group or the like which may be substituted with a C1-6 alkyl group or the like, or the like.

Abstract: Disclosed is a compound represented by General formula (I), a pharmaceutically acceptable salt thereof, or a solvate of the compound or the pharmaceutically acceptable salt, which has an inhibitory activity of the production of A? or a BACE1-inhibiting activity, and is therefore useful as a prophylactic or therapeutic agent for A?-induced neurodegenerative diseases typified by Alzheimer-type dementia. Wherein the ring A represents a C6-14 aryl group or the like; L represents —NReCO— [wherein Re represents a hydrogen atom or the like] or the like; the ring B represents a C6-14 aryl group or the like; X represents a C1-3 alkylene group or the like; Y represents a single bond or the like; Z represents a C1-3 alkylene group or the like; R1 and R2 independently represent a hydrogen atom or the like; and R3, R4, R5 and R6 independently represent a hydrogen atom, a halogen atom or the like.

Abstract: The present invention provides a compound represented by the formula (I): or a pharmacologically acceptable salt thereof, wherein Ar1 represents an imidazolyl group that may be substituted with a C1-6 alkyl group, or the like, Ar2 represents a phenyl group that may be substituted with a C1-6 alkoxy group, or the like, X1 represents a double bond or the like, and Het represents an imidazolyl group that may be substituted with a C1-6 alkyl group, or the like, which is effective as a therapeutic or prophylactic agent for a disease caused by A?.

Abstract: The present invention provides a most suitable prodrug of a cinnamide compound. The prodrug is represented by Formula (I) wherein Ra and Rb each denote a C1-6 alkyl group or the like; Xa denotes a methoxy group or a fluorine atom; Y denotes a phosphono group or the like; and A denotes a cyclic lactam derivative.

Abstract: The present invention provides a compound represented by the formula (I): or a pharmacologically acceptable salt thereof, wherein Ar1 represents an imidazolyl group that may be substituted with a C1-6 alkyl group, or the like, Ar2 represents a phenyl group that may be substituted with a C1-6 alkoxy group, or the like, X1 represents a double bond or the like, and Het represents an imidazolyl group that may be substituted with a C1-6 alkyl group, or the like, which is effective as a therapeutic or prophylactic agent for a disease caused by A?.

Abstract: The present invention relates to a compound represented by formula (I): wherein R1 represents a C1-3 alkyl group, R2 represents a hydrogen atom or a C1-3 alkyl group, Ar represents a phenyl group or the like which may be substituted with 1 to 3 substituents, X represents an oxygen atom or the like, n and m are the same or different and integers of 0 to 2, or a pharmacologically acceptable salt, and use thereof as a medicament.

Abstract: Disclosed is a compound represented by the formula (I) below or a pharmacologically acceptable salt thereof. Also disclosed is a use of the compound or salt as a pharmaceutical product. (In the formula, Ar1 represents an imidazolyl group which may be substituted with a C1-6 alkyl group; Ar2 represents a phenyl group which may be substituted with a C1-6 alkoxy group; X1 represents a single bond; R1 and R2 respectively represent a C1-6 alkyl group or the like which may be substituted with a substituent such as a 5- to 14-membered aromatic heterocyclic group; and R3 represents a hydrogen atom or the like.

Abstract: A compound represented by the general formula: wherein Ring A is a C6-14 aryl group or the like, L is —NRLCO— or the like (wherein RL is a hydrogen atom or the like), Ring B is a C6-14 aryl group or the like, X is a C1-3 alkylene group or the like, Y is a C1-3 alkylene group or the like, Z is an oxygen atom or the like, R1 and R2 are each independently a hydrogen atom or the like, and R3, R4, R5 and R6 are independently a hydrogen atom, a halogen atom or the like, or a pharmaceutically acceptable salt thereof, or a solvate thereof, has an A? production inhibitory effect or a BACE1 inhibitory effect and is useful as a therapeutic agent for a neurodegenerative disease caused by A? and typified by Alzheimer-type dementia.

Abstract: The present invention relates to a process for preparing a compound of formula (6a): wherein Ar1 represents an imidazolyl group which may be substituted with 1 to 3 substituents shown below; Ar2 represents a pyridinyl group, a pyrimidinyl group or a phenyl group which may be substituted with 1 to 3 substituents; and R11 represents a group selected from certain substituents.

Abstract: The present invention relates to a compound represented by Formula (I): (wherein Ar1 represents an imidazolyl group which may be substituted with 1 to 3 substituents; Ar2 represents a pyridinyl group, a pyrimidinyl group, or a phenyl group which may be substituted with 1 to 3 substituents; X1 represents (1) —C?C— or (2) a double bond etc. which may be substituted; R1 and R2 represent, for example, a C1-6 alkyl group or C3-8 cycloalkyl group which may be substituted) or a pharmacologically acceptable salt thereof and to the use thereof as pharmaceutical agents. The object of the present invention is to find a therapeutic or preventive agent for diseases caused by A?. According to the present invention, a therapeutic or preventive agents for diseases caused by A? can be provided.

Abstract: The present invention relates to a compound represented by the formula (I): or a pharmacologically acceptable salt thereof, wherein R1, R2, R3, and R4 are the same or different and each represent a hydrogen atom or a C1-6 alkyl group; X1 represents a C1-6 alkylene group that may be substituted; Xa represents a methoxy group or a fluorine atom; Xb represents an oxygen atom or a methylene group, provided that Xb is only an oxygen atom when Xa is a methoxy group; and Ar1 represents an aryl group, pyridinyl group, aryloxy group, or pyridinyloxy group that may have a substituent such as a halogen atom; and to use of the compound or salt as a pharmaceutical agent.

Abstract: The present invention relates to a process for preparing a compound of formula (6a): wherein Ar1 represents an imidazolyl group which may be substituted with 1 to 3 substituents shown below; Ar2 represents a pyridinyl group, a pyrimidinyl group or a phenyl group which may be substituted with 1 to 3 substituents; and R11 represents a group selected from certain substituents.

Abstract: A compound (8) represented by the formula: (8) wherein R1 represents a 6- to 14-membered aromatic hydrocarbon ring group which may have a substituent; and n represents 0 to 2, can be produced with good efficiency by reacting a compound (3) represented by the formula: (3) wherein R1 and n are as defined above; and Q represents a single bond or —CH(Y)— where Y represents a hydrogen atom or a C1-6 alkyl group] with 3-methoxy-4-(4-methyl-1H-imidazol-1-yl)benzaldehyde in the presence of a base.

Abstract: A compound represented by the general formula: or a pharmaceutically acceptable salt thereof or a solvate thereof, wherein Ring A is a C6-14 aryl group or the like, L is —NReCO— or the like (wherein Re is a hydrogen atom or the like), Ring B is a C6-14 aryl group or the like, X is a C1-3 alkylene group or the like, Y is a single bond or the like, Z is a C1-3 alkylene group or the like, R1 and R2 are each independently a hydrogen atom or the like, and R3, R4, R5 and R6 are independently a hydrogen atom, a halogen atom or the like, has an A? production inhibitory effect or a BACE1 inhibitory effect and is useful as a prophylactic or therapeutic agent for a neurodegenerative disease caused by A? and typified by Alzheimer-type dementia.

Abstract: Disclosed is a compound represented by the formula (I) below or a pharmacologically acceptable salt thereof. Also disclosed is a use of the compound or salt as a pharmaceutical product. (In the formula, Ar1 represents a triazolyl group or the like which may be substituted with a C1-6 alkyl group or the like; Ar2 represents a phenyl group or the like which may be substituted with a C1-6 alkoxy group or the like; X1 represents —CR3?CR4— (wherein R3 and R4 respectively represent a C1-6 alkyl group or the like); and R1 and R2 respectively represent a C1-6 alkyl group or the like.

Abstract: The present invention relates to a novel two cyclic cinnamide compound and a pharmaceutical agent comprising the compound as an active ingredient. The two cyclic cinnamide compound represented by the general formula (I): wherein represents a single bond or a double bond; Ar1 represents a phenyl group or pyridinyl group that may be substituted with 1 to 3 substituents; R1 and R2 each represent a C1-6 alkyl group, a hydroxyl group, or the like; Z1 represents a methylene group or vinylene group, which may be substituted with 1 or 2 substituents selected from Substituent Group A1, an oxygen atom, or an imino group that may be substituted with a substituent selected from Substituent Group A1; and p, q, and r each represent an integer of 0 to 2, which has an effect of reducing A?40 and A?42 production, and thus is particularly useful as a prophylactic or therapeutic agent for a neurodegenerative disease caused by A? such as Alzheimer's disease or Down's syndrome.

Abstract: A compound represented by the formula (I): or a pharmacologically acceptable salt thereof, wherein Ar1 represents an imidazolyl group or the like which may be substituted with a C1-6 alkyl group, Ar2 represents a phenyl group or the like which may be substituted with a C1-6 alkoxy group, X1 represents a double bond or the like and Het represents a triazolyl group or the like which may be substituted with a C1-6 alkyl group or the like, is effective as a therapeutic or prophylactic agent for a disease caused by A?.

Abstract: The present invention provides a most suitable prodrug of a cinnamide compound. The prodrug is represented by Formula (I) wherein Ra and Rb each denote a C1-6 alkyl group or the like; Xa denotes a methoxy group or a fluorine atom; Y denotes a phosphono group or the like; and A denotes a cyclic lactam derivative.

Abstract: The present invention relates to a compound represented by formula (I): wherein R1 represents a C1-3 alkyl group, R2 represents a hydrogen atom or a C1-3 alkyl group, Ar represents a phenyl group or the like which may be substituted with 1 to 3 substituents, X represents an oxygen atom or the like, n and m are the same or different and integers of 0 to 2, or a pharmacologically acceptable salt, and use thereof as a medicament.