2,2-Dimethyl-propionic acid (4R,6R,9R,11S)-11-(tert-butyl-dimethyl-silanyloxy)-9-hydroxy-5-oxa-tricyclo[8.3.0.04,6]tridec-1(10)-ene-2,7-diyn-4-ylmethyl ester 在
吡啶 、
甲基磺酸酐 作用下,
以
二氯甲烷 为溶剂,
以50%的产率得到2,2-Dimethyl-propionic acid (E)-(4R,6R,11S)-11-(tert-butyl-dimethyl-silanyloxy)-5-oxa-tricyclo[8.3.0.0
4,6]trideca-1(13),9-diene-2,7-diyn-4-ylmethyl ester