Abstract:
Disclosed are optically active secondary amine compounds and salts thereof having the general formula (I): ##STR1## a process for the preparation of the optically active secondary amine compounds and salts thereof, and the use of such compounds. Such compounds exhibit a high resolution power and hence are useful agents for optical resolution.
Abstract:
Disclosed are optically active secondary amine compounds and salts thereof having the general formula (I): ##STR1## a process for the preparation of the optically active secondary amine compounds and salts thereof, and the use of such compounds. Such compounds exhibit a high resolution power and hence are useful agents for optical resolution.
Abstract:
A method for producing 1-[(substituted phenyl)phenylmethyl]piperazines useful as intermediates for pharmaceuticals and the like, more particularly, for example, to an intermediate for the production of antiallergic pharmaceuticals. A 4-(tert-butoxycarbonyl)piperazine compound of formula (1): wherein X denotes a chlorine atom, a C1-C3 alkyl group or a C1-C3 alkoxy group, and an optical isomer present therein.
Abstract:
There is provided a process for producing N-substituted azetidine-2-carboxylic acid of the formula I: wherein R1 denotes an aralkyl group or an arylated lower alkoxycarbonyl group and * designates an asymmetric carbon atom, which is characterized by: reacting an N-substituted azetidine-2-carboxylic acid ester of the formula II: wherein R1 has the same meaning as defined above and R2 denotes an alkyl group, an aralkyl group or an allyl group, with an enzyme capable of selectively hydrolyzing a stereoisomer based on the carbon atom of the 2-position of the azetidine ring.
Abstract:
There is disclosed a method of resolving 2-oxobicyclo[3.1.0]hexane-6-carboxylates having the following relative configuration of formula (1): wherein X1, X2, R1, R2 and R3 have the same meanings as defined below, into one enantiomer ester thereof and the other enantiomer acid, which is characterized by contacting an enzyme having an ability to preferentially hydrolyze one enantiomer ester contained in 2-oxobicyclo[3.1.0]hexane-6-carboxylate of formula (1) as defined above, with 2-oxobicyclo[3.1.0]hexane-6-carboxylates of formula (1) as defined above to obtain one enantiomer as an acid and the other enantiomer as an ester.
Abstract:
There is provided a process for producing N-substituted azetidine-.2-carboxylic acid of the formula I: ##STR1## wherein R.sup.1 denotes an aralkyl group or an arylated lower alkoxycarbonyl group and * designates an asymmetric carbon atom, which is characterized by:reacting an N-substituted azetidine-2-carboxylic acid ester of the formula II: ##STR2## wherein R.sup.1 has the same meaning as defined above and R.sup.2 denotes an alkyl group, an aralkyl group or an allyl group, with an enzyme capable of selectively hydrolyzing a stereoisomer based on the carbon atom of the 2-position of the azetidine ring.
Abstract:
There is provided a process for producing an optically active N-substituted azetidine-2-carboxylic acid compound represented by the formula (2): ##STR1## by contacting a corresponding N-substituted azetidine-2-carboxylic acid ester of formula (2) with an enzyme derived from a microorganism selected from Arthrobacter SC-6-98-28 strain, Arthrobacter sp. ATCC21908 strain, Chromobacterium SC-YM-1 strain, and a mutant thereof. A process is also provided for preparing an optically active azetidine-2-carboxylic acid by eliminating the N-substituent of a N-substituted azetidine-2-carboxylic acid ester of formula (2).