(E)-4-[(1R,2S,4R)-2-((E)-(S)-6-Hydroxy-hept-1-enyl)-4-(2-methoxy-ethoxymethoxy)-cyclopentyl]-4-(2-methoxy-ethoxymethoxy)-but-2-enoic acid (E)-2-dimethylcarbamoyl-1-methyl-vinyl ester 在
D(+)-10-樟脑磺酸 作用下,
以
甲苯 为溶剂,
生成
(1R,6S,11aS,13S,14aR)-1,13-bis[(2-methoxyethoxy)methoxy]-6-methyl-1,6,7,8,9,11a,12,13,14,14a-decahydro-4H-cyclopenta[f]oxacyclotridecin-4-one 、 (1R,6S,11aS,13S,14aR)-1,13-bis[(2-methoxyethoxy)methoxy]-6-methyl-1,6,7,8,9,11a,12,13,14,14a-decahydro-4H-cyclopenta[f]oxacyclotridecin-4-one