(3aR,4'S,5S,6aR)-2,2-dimethyl-2'-oxodihydro-3aH-spiro[furo[2,3-d][1,3]dioxole-6,4'-oxazolidine]-5-carbaldehyde 、
乙氧甲酰基亚甲基三苯基膦 在
lithium bromide 作用下,
以
乙腈 为溶剂,
反应 0.5h,
生成 (Z)-ethyl-3-{(3aR,4'S,5R,6aR)-2,2-dimethyl-2'-oxodihydro-3aH-spiro[furo[2,3-d][1,3]dioxole-6,4'-oxazolidine]-5-yl}acrylate 、
(E)-ethyl-3-{(3aR,4'S,5R,6aR)-2,2-dimethyl-2'-oxodihydro-3aH-spiro[furo[2,3-d][1,3]dioxole-6,4'-oxazolidine]-5-yl}acrylate