[(1R)-1-[(3aR,4R,6R,6aS)-6-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-4-yl]but-3-enyl] prop-2-enoate 在
Grubbs catalyst first generation titanium(IV) isopropylate 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
以67%的产率得到(2R)-2-[(3aS,4R,6R,6aR)-4-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]-2,3-dihydropyran-6-one