methyl (R)-2-diazo-3-[3-methyl-1-oxa-5-azaspiro[5.5]undecan-5-yl]-3-oxopropanoate 在
dirhodium tetraacetate 作用下,
以
二氯甲烷 为溶剂,
反应 18.0h,
生成 methyl (5'R,6'R,7'R)-5'-methyl-8'-oxospiro[cyclohexane-1,2'-[3]oxa[1]azabicyclo[4.2.0]octane]-7'-carboxylate 、 methyl (5'R,6'S,7'S)-5'-methyl-8'-oxospiro[cyclohexane-1,2'-[3]oxa[1]azabicyclo[4.2.0]octane]-7'-carboxylate