(1S,5R,8S,9R,10S)-9,10-dicarboxy-1,5,11,11-tetramethyltricyclo[6.2.1.0(3,8)]undec-2-ene dimethyl ester 在
臭氧 、
二甲基硫 作用下,
以
甲基环己烷 为溶剂,
以22%的产率得到(-)-(1S,4S,6R,9R,10R,11S)-10-carboxy-4-hydroxy-11-methoxycarbonyl-3-oxa-1,6,12,12-tetramethyltri-cyclo[7.2.1.0(4,9)]dodecan-2-one γ-lactone