(8E,10E,14Z,16E,20Z)-(3S,4R,5S,7R,13R,18S,19S)-15-Ethyl-4,18,22-trihydroxy-3,5,7,9,13,19-hexamethyl-docosa-8,10,14,16,20-pentaen-6-one 在
Celite 、 silver carbonate 作用下,
以
苯 为溶剂,
反应 4.0h,
以75%的产率得到(3Z,5S,6S)-6-[(1E,3Z,5R,7E,9E,11R,13S,14R,15S)-3-ethyl-14-hydroxy-5,9,11,13,15-pentamethyl-12-oxoheptadeca-1,3,7,9-tetraenyl]-5-methyl-5,6-dihydropyran-2-one