对硝基溴化苄 、 (3aS,4R,8R,8aS)-4,8-dibenzyl-2,2-dimethyl-5-[[1-(2-trimethylsilylethoxymethyl)indazol-5-yl]methyl]-4,7,8,8a-tetrahydro-3aH-[1,3]dioxolo[4,5-e][1,3]diazepin-6-one 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
生成
(3aS,4R,8R,8aS)-4,8-Dibenzyl-2,2-dimethyl-5-(4-nitro-benzyl)-7-[1-(2-trimethylsilanyl-ethoxymethyl)-1H-indazol-5-ylmethyl]-hexahydro-1,3-dioxa-5,7-diaza-azulen-6-one