(2S,6R,9S,12R,13S)-13-(tert-butyldimethylsiloxy)-12-isobutyl-6-methyl-2-[(E)-4-(tritylthio)but-1-enyl]-9-tritylthiomethyl-1-oxa-5,8,11-triazacyclopentadecane-4,7,10,15-tetraone 在
碘 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 0.17h,
以95%的产率得到(1S,5S,6R,9S,20R,E)-5-(tert-butyldimethylsilyloxy)-6-isobutyl-20-methyl-2-oxa-11,12-dithia-7,19,22-triazabicyclo[7.7.6]docos-15-ene-3,8,18,21-tetraone