tetrahydro-2H-pyran-3-carboxylic acid 、
ethyl 5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxylate 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 ethyl 5-methyl-4-(tetrahydro-2H-pyran-3-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxylate