呋喃甲酰氯 、
1-[(1S,2R,13S,14S,17R,18S,20S)-7-(4-fluorophenyl)-17,20-dihydroxy-2,18-dimethyl-6,7-diazapentacyclo[11.7.0.02,10.04,8.014,18]icosa-4(8),5,9-trien-17-yl]-2-([1,3]oxazolo[4,5-b]pyridin-2-ylsulfanyl)ethanone 在
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
以2%的产率得到(1R,3aS,3bS,10aR,10bS,11S,12aS)-7-(4-fluorophenyl)-11-hydroxy-10a,12a-dimethyl-1-(2-(oxazolo[4,5-b]pyridin-2-ylthio)acetyl)-1,2,3,3a,3b,4,5,7,10,10a,10b,11,12,12a-tetradecahydrocyclopenta[5,6]naphtho[1,2-f]indazol-1-yl furan-2-carboxylate