4-nitrophenyl 2'-oxo-1',2'-dihydrospiro[piperidine-4,4'-pyrido[2,3-d][1,3]oxazine]-1-carboxylate 、 (6,9-trans)-6-(3,4-difluorophenyl)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-9-ol 在
sodium hydride 作用下,
以
四氢呋喃 、
苯 为溶剂,
反应 17.0h,
以7.2%的产率得到(6,9-trans)-6-(2,3-difluorophenyl)-6,7,8,9-tetrahydro-5H-cyclohepta[b]pyridin-9-yl 2-oxo-1,2-dihydrospiro[benzo[d][1,3]oxazine-4,4'-piperidine]-1'-carboxylate