C-(N-4-methoxyphenylcarbamoyl)-N-(p-tolyl)nitrone 、
dimethyl 2-(1-phenylethylidene)cyclopropane-1,1-dicarboxylate 以
甲苯 为溶剂,
反应 41.0h,
以51%的产率得到dimethyl (3SR,4RS,7RS)-4-methyl-6-(p-tolyl)-4-phenyl-7-[N-(4-methoxyphenyl)carbamoyl]-5-oxa-6-azaspiro[2.4]-heptane-1,1-dicarboxylate