Manufacturing method null of optical active stereoisomer of jihidoroshikuroshitora - ru and jihidoroshikuroshitora -

摘要

the dihydrocyclocitral is obtained by cyclization through a ring agent acid ester of an enol formin which the wavy line defines a conjunction c (cis or trans) x x x x x x x is an acyl or p (o) (or) u2082, r is a monovalent alkyl or aryl radical, and z is lower, a monovalent group form(ch = c (chu2083 u2082, b). chu2082 - c (oh) (chu2083) u2082, ouc. chu2082 (chu2082 chu2083).;the process of the invention allows the manufacture of racemic dihydrocyclocitral not only, but also of the optically active antipodes forms