碘 、 3-[(2S,6R,9S,12R,13S)-13-hydroxy-12-isopropyl-4,7,10,15-tetraoxo-2-((E)-4-tritylsulfanyl-but-1-enyl)-9-tritylsulfanylmethyl-1-oxa-5,8,11-triaza-cyclopentadec-6-ylmethyl]-indole-1-carboxylic acid tert-butyl ester 、
disodium;dioxido-oxo-sulfanylidene-λ6-sulfane 在
二氯甲烷 、
magnesium sulfate 、 silica gel 、
methanol-dichloromethane 作用下,
以
methanol-dichloromethane 为溶剂,
反应 1.0h,
以gave 7B (13 mg, 0.019 mmol, 46%) as a white solid的产率得到3-((E)-(1S,5S,6R,9 S,20R)-5-Hydroxy-6-isopropyl-3,8,18,21-tetraoxo-2-oxa-11,12-dithia-7,19,22-triaza-bicyclo[7.7.6]docos-15-en-20-ylmethyl)-indole-1-carboxylic acid tert-butyl ester