Abstract: There are provided a process for preparing an optically active aminopentane derivative that is promising as a psychotropic agent, an antidepressant agent, an antiparkinsonian agent, an anti-Alzheimer's agent, an apoptosis inhibitor, or the like; a novel optically active intermediate oxathiazolidine derivative very useful in the production of the aminopentane derivative; and process for the production thereof. The optically active aminopentane derivatives can be produced in an industrially advantageous manner from a novel optically active oxathiazolidine derivative represented by formula (5): wherein * indicates the position of an asymmetric carbon atom in the R or S configuration, and n is 0 or 1.

Abstract: There are provided a process for preparing an optically active aminopentane derivative that is promising as a psychotropic agent, an antidepressant agent, an antiparkinsonian agent, an anti-Alzheimer's agent, an apoptosis inhibitor, or the like; a novel optically active intermediate oxathiazolidine derivative very useful in the production of the aminopentane derivative; and process for the production thereof. The optically active aminopentane derivatives can be produced in an industrially advantageous manner from a novel optically active oxathiazolidine derivative represented by formula (5): wherein * indicates the position of an asymmetric carbon atom in the R or S configuration, and n is 0 or 1.

Abstract: There are provided a process for preparing an optically active aminopentane derivative that is promising as a psychotropic agent, an antidepressant agent, an antiparkinsonian agent, an anti-Alzheimer's agent, an apoptosis inhibitor, or the like; a novel optically active intermediate oxathiazolidine derivative very useful in the production of the aminopentane derivative; and process for the production thereof. The optically active aminopentane derivatives can be produced in an industrially advantageous manner from a novel optically active oxathiazolidine derivative represented by formula (5): wherein * indicates the position of an asymmetric carbon atom in the R or S configuration, and n is 0 or 1.

Abstract: There are provided a process for preparing an optically active aminopentane derivative that is promising as a psychotropic agent, an antidepressant agent, an antiparkinsonian agent, an anti-Alzheimer's agent, an apoptosis inhibitor, or the like; a novel optically active intermediate oxathiazolidine derivative very useful in the production of the aminopentane derivative; and process for the production thereof. The optically active aminopentane derivatives can be produced in an industrially advantageous manner from a novel optically active oxathiazolidine derivative represented by formula (5): wherein * indicates the position of an asymmetric carbon atom in the R or S configuration, and n is 0 or 1.

Abstract: This invention provides novel 2-(N-cyanoimino)thiazolidin-4-one derivatives represented by formula I or a pharmaceutically acceptable salt or solvate thereof: wherein ring A represents a benzene ring, a condensed ring or a heterocyclic ring, each of which may be substituted by one or more substituents selected from a straight or branched C1-C4 alkyl group, a haloalkyl group, a halogen atom or —OR5, R1 represents a single bond, an oxygen atom, a sulfur atom, a methyne group, a straight or branched C1-C4 alkylene or alkenylene group optionally substituted by a phenyl group, R6—X, X—R6, X—R6—X, R6—X—R6, —C(═O)—NR7— or —NR7—C(═O)—, R2 and R3 are the same or different and each represents a hydrogen atom, a C1-C4 alkyl group, —OR8 or a halogen atom, R4 represents a hydrogen atom or a C1-C4 alkyl group, R5 represents a hydrogen atom or a C1-C4 alkyl group, R6 represents a straight or branched C1-C4 al