(1R,2R,5S,10S,11R,14R,15R,23R)-1,2,8,8,15,22,22-heptamethyl-5-(2H-tetrazol-5-yl)-20-oxa-19-azahexacyclo[12.11.0.02,11.05,10.015,23.017,21]pentacosa-17(21),18-dien-12-one 、 trimethylsilyldiazomethane 以
四氢呋喃 、
甲醇 为溶剂,
以77%的产率得到(1R,2R,5S,10S,11R,14R,15R,23R)-1,2,8,8,15,22,22-heptamethyl-5-(2-methyltetrazol-5-yl)-20-oxa-19-azahexacyclo[12.11.0.02,11.05,10.015,23.017,21]pentacosa-17(21),18-dien-12-one