4-(Benzenesulfonyl)-5-oxido-1,2,5-oxadiazol-5-ium-3-one 、 4-((5-(4-(((6R,12aR)-6-(benzo[d][1,3]dioxacyclopentene-5-yl)-1,4-dioxo-3,4,6,7,12,12a-hexahydropyrazino[1',2':1,6]pyridino[3,4-b]indole-2(1H)-yl)methyl)-1H-1,2,3-triazole-1-yl)amyl)oxy)-3-(benzenesulfonyl)-1,2,5-oxadiazole-2 oxide 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以52 %的产率得到