(1R,2S)-methyl 1-((1R,2R,5R)-5-(tert-butyldiphenylsilyloxy)-2-(hex-5-enyl(methyl)carbamoyl)cyclohexanecarboxamido)-2-vinylcyclopropanecarboxylate 在
氮气 、 1B 、 silica 、
二氯甲烷 、 crude material 、 silica gel 、
methanol-dichloromethane 作用下,
以
1,1-二氯乙烷 为溶剂,
反应 3.25h,
以to yield compound 42 as a brown solid in 81% yield的产率得到(1aR,3aR,5R,7aR,15aS,Z)-methyl 5-(tert-butyldiphenylsilyloxy)-9-methyl-3,8-dioxo-1a,2,3,3a,4,5,6,7,7a,8,9,10,11,12,13,15a-hexadecahydro-1H-benzo[c]cyclopropa[g][1,6]diazacyclotetradecine-1a-carboxylate