在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
以14.6 mg的产率得到tert-butyl 4-[[(5R,8S,11S)-5-methyl-6,9,13-trioxo-11-[(E)-4-tritylsulfanylbut-1-enyl]-10-oxa-3,17-dithia-7,14,19,20-tetrazatricyclo[14.2.1.12,5]icosa-1(18),2(20),16(19)-trien-8-yl]methyl]imidazole-1-carboxylate