2-Diazo-malonic acid 2-(3,6-dihydro-2H-pyridin-1-yl)-ethyl ester ethyl ester 在
copper acetylacetonate 作用下,
以
甲苯 为溶剂,
生成 1-Oxo-3,4,6,9-tetrahydro-5H-2-oxa-4a-aza-benzocycloheptene-9a-carboxylic acid ethyl ester 、 1-Oxo-8-vinyl-tetrahydro-pyrrolo[2,1-c][1,4]oxazine-8a-carboxylic acid ethyl ester