Ethyl 2-diazo-2-[2-[(6-ethenyl-1,3-benzodioxol-5-yl)methyl-methylcarbamoyl]phenyl]acetate 在
dirhodium tetraacetate 作用下,
以
四氢呋喃 为溶剂,
反应 0.5h,
以52%的产率得到Ethyl 20-hydroxy-12-methyl-5,7-dioxa-12-azapentacyclo[11.8.0.02,10.04,8.014,19]henicosa-1(13),2,4(8),9,14,16,18-heptaene-20-carboxylate