ethyl 2-(3-(benzyloxycarbonylamino)-6-((methylsulfonyloxy)methyl)tetrahydro-2H-pyran-3-yl)-5-(methylsulfonyloxy)-6-oxo-1,6-dihydropyrimidine-4-carboxylate 在
caesium carbonate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 18.0h,
以55%的产率得到ethyl 10-(((benzyloxy)carbonyl)amino)-3-hydroxy-4-oxo-4,6,7,8,9,10-hexahydro-7,10-(epoxymethano)pyrimido[1,2-a]azepine-2-carboxylate