在
2,3-二氯-5,6-二氰基-1,4-苯醌 作用下,
以93%的产率得到(3S,4R,5R,6R)-6-[(3Z,8Z,16Z)-(2R,5R,6R,7R,11R,13S,14R,15R)-2,6-Bis-(tert-butyl-dimethyl-silanyloxy)-14-hydroxy-5,7,9,11,13,15-hexamethyl-12-oxo-nonadeca-3,8,16,18-tetraenyl]-4-(tert-butyl-dimethyl-silanyloxy)-3,5-dimethyl-tetrahydro-pyran-2-one