Acrylic acid (R)-1-((3aS,3bR,7aS,8aS)-2,2,5,5-tetramethyl-tetrahydro-[1,3]dioxolo[4,5]furo[3,2-d][1,3]dioxin-8a-yl)-but-3-enyl ester 在
Grubbs catalyst first generation titanium(IV) isopropylate 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
以60%的产率得到(R)-6-((3aS,3bR,7aS,8aS)-2,2,5,5-Tetramethyl-tetrahydro-[1,3]dioxolo[4,5]furo[3,2-d][1,3]dioxin-8a-yl)-5,6-dihydro-pyran-2-one