乙酸酐 、
(Z)-2-Methyl-but-2-enoic acid (1R,2S,7R,8S,9R,11S,13S)-1,9-dihydroxy-9,13-dimethyl-8-((Z)-2-methyl-but-2-enoyloxy)-4-methylene-5-oxo-6,14-dioxa-tricyclo[9.2.1.03,7]tetradec-2-yl ester 在
吡啶 作用下,
反应 96.0h,
以25 mg的产率得到(Z)-2-Methyl-but-2-enoic acid (1S,2S,7R,8S,9R,11S,13S)-1-acetoxy-9-hydroxy-9,13-dimethyl-8-((Z)-2-methyl-but-2-enoyloxy)-4-methylene-5-oxo-6,14-dioxa-tricyclo[9.2.1.0
3,7]tetradec-2-yl ester