Diazo-acetic acid (1R,3S)-3-(3-ethyl-5-methyl-phenoxy)-1-methyl-butyl ester 在
tetrakis(trifluoroacetato)rhodium(II) 作用下,
以
二氯甲烷 为溶剂,
生成 (7S,9R,11aS)-2-Ethyl-4,7,9-trimethyl-8,9-dihydro-7H,11aH-6,10-dioxa-cycloheptacycloocten-11-one 、 (7S,9R,11aS)-4-Ethyl-2,7,9-trimethyl-8,9-dihydro-7H,11aH-6,10-dioxa-cycloheptacycloocten-11-one