abstract |
Formula (I) or (II): Embedded image (Wherein R and R ′ are C 1 -C 10 alkyl, C 2 ~C 10 alkenyl or C 3 It represents -C 10 cycloalkyl, and wedge line (S) - or (R) - shows the stereochemistry, the substituents in compound (II) is trans. A) is provided a process for preparing an enantiomerically pure compound of formula (I). |