3-benzyloxy-9-methyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylic acid 、 methyl 2-(aminomethyl)-5-fluorobenzoate trifluoroacetic acid salt 在
benzotriazole-1-yloxy-tris-pyrrolidino-phosphonium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以100%的产率得到N-{4-fluoro-2-(methylcarbamoyl)benzyl}-3-benzyloxy-9-methyl-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxamide