(3S)-3-allyloxy-4-hydroxy-4-vinylhex-5-enoic acid ethyl ester 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
生成 [(2S,3S)-3-hydroxy-3-vinyl-3,6-dihydro-2H-pyran-2-yl]acetic acid ethyl ester 、 [(2S,3R)-3-hydroxy-3-vinyl-3,6-dihydro-2H-pyran-2-yl]acetic acid ethyl ester