| abstract |
(57) [Summary] The present invention relates to a method for producing a pharmaceutical intermediate. For details, see the formula (R represents a 4-methoxybenzyl group, a 3,4-dimethoxybenzyl group, a p-phenylbenzyl group, a triphenylmethyl group, a p-chlorobenzyl group or a benzyl group.) About the method. According to the production method of the present invention, two types of optically active substances can be produced without going through the optical splitting step. |