Abstract:
Disclosed is a chiral phase-transfer catalyst having a simplified structure, which can be produced by reacting a 2,2'-dimethylenebromide-1,1'-binaphthyl derivative (which can be produced in relatively small numbers of steps) with a secondary amine (which is readily available). The catalyst is a compound represented by the formula (I) having a long-chain alkyl group R 7 in its chemical structure. The catalyst is expected to show a high stereoselectivity even in a reaction where a conventional catalyst does not show a satisfactory stereoselectivity such as an asymmetric alkylation reaction.
Abstract:
Optically active 3−(N−alkoxycarbonyl−N−methyl)amino&m inus;1− alkoxycarbonyloxy−(2−thienyl)propanes, which are novel compounds of the general formula (I), can be prepared by reacting optically active 3−(N,N−dimethylamino)−1−( 2−thienyl)−propan −1−ol with a haloformic ester in the presence of a base, and hydrolysis of the compounds (I) under basic conditions gives optically active 3−(N−methylamino)−1−(2−th ienyl)−propan−1 −ol: (I) wherein R 1 and R 2 are each independently alkyl having 1 to 4 carbon atoms, or the like; and * represents an asymmetric center.