摘要:
The present invention is to provide a process for preparing optically active tetrahydroquinoline derivatives which can be used for the treatment and/or prevention of diseases such as arteriosclerotic diseases, dyslipidemia and the like, and a process for preparing synthetic intermediates thereof.Specifically, (2R,4S)-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinolin-4-ylamine or a salt thereof is prepared with fewer steps without using an optical resolution, and the optically active tetrahydroquinoline derivatives are obtained from the amine compound.
摘要:
The present invention is to provide a process for preparing optically active tetrahydroquinoline derivatives which can be used for the treatment and/or prevention of diseases such as arteriosclerotic diseases, dyslipidemia and the like, and a process for preparing synthetic intermediates thereof.Specifically, (2R,4S)-2-ethyl-6-trifluoromethyl-1,2,3,4-tetrahydroquinolin-4-ylamine or a salt thereof is prepared with fewer steps without using an optical resolution, and the optically active tetrahydroquinoline derivatives are obtained from the amine compound.
摘要:
The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
摘要:
The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
摘要:
The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
摘要:
The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an asymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.] to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
摘要:
The present invention relates to a method for preparing an optically active 4-hydroxy-1,2,3,4-tetrahydroquinoline compound [I], which comprises the steps of: treating a racemic 4-hydroxy-1,2,3,4-tetrahydroquinoline compound represented by general formula [I]: [wherein R1 represents a hydrogen atom or a protecting group for amino group.] with an enzyme having an ability of selectively or preferentially acylating one enantiomer of the racemic compound [I] in the presence of an acyl donor; and if necessary, subjecting the reaction product to solvolysis.
摘要:
The present invention relates to a method for preparing an optically active 4-hydroxy-1,2,3,4-tetrahydroquinoline compound [I], which comprises the steps of:treating a racemic 4-hydroxy-1,2,3,4-tetrahydroquinoline compound represented by general formula [I]: [wherein R1 represents a hydrogen atom or a protecting group for amino group.] with an enzyme having an ability of selectively or preferentially acylating one enantiomer of the racemic compound [I] in the presence of an acyl donor; and if necessary, subjecting the reaction product to solvolysis.
摘要:
The present invention relates to a method for preparing an optically active cyclic alcohol compound represented by general formula [I]: [wherein R represents a hydrogen atom or a protecting group for amino group, and * represents an astymmetric carbon atom.] which comprises a step of subjecting a cyclic ketone compound represented by general formula [II]: [wherein R has the same meaning as defined above.]to asymmetric reduction (A) in the presence of an optically active oxazaborolidine compound and a boron hydride compound, or (B) in the presence of an asymmetric transition metal complex obtained from a transition metal compound and an asymmetric ligand and a hydrogen donor, and relates to said compound.
摘要:
A shield connector (C) includes a tubular metallic shield shell (30) integrally attached to the outer circumferential surface of a housing (10) made of resin by insert molding. The shield shell (30) is formed with a cut (32) extending between opposite ends in a longitudinal direction, and a pair of opening preventing pieces (34A, 34B) which extend radially inward or outward, circumferentially face each other and can come into contact with each other when edges (33A, 33B) at the opposite sides of the cut (32) are displaced in directions away from each other are provided on the opposite edges (33A, 33B) of the shield shell 30 facing each other with the cut (32) therebetween.