[(1R)-1-[(3aR,4R,6S,6aR)-4-(2,4-dioxopyrimidin-1-yl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]-2-[tert-butyl(diphenyl)silyl]oxyethyl] methanesulfonate 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (1R,9S,10R,11R,15R)-9-[[tert-butyl(diphenyl)silyl]oxymethyl]-13,13-dimethyl-8,12,14,16-tetraoxa-2,6-diazatetracyclo[8.5.1.02,7.011,15]hexadeca-3,6-dien-5-one 、 (1R,9R,10R,11R,15R)-9-[[tert-butyl(diphenyl)silyl]oxymethyl]-13,13-dimethyl-8,12,14,16-tetraoxa-2,6-diazatetracyclo[8.5.1.02,7.011,15]hexadeca-3,6-dien-5-one