[(2R,4R,5R,6S)-4-[[tert-butyl(diphenyl)silyl]oxymethyl]-10-oxo-3,7-dioxa-1,9-diazatricyclo[6.4.0.02,6]dodeca-8,11-dien-5-yl] N-[(2-nitrophenyl)methoxy]carbamate 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
四氢呋喃 为溶剂,
生成 1-[(3aR,4R,6R,6aS)-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-3-[(2-nitrophenyl)methoxy]-2-oxo-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]oxazol-4-yl]pyrimidine-2,4-dione