Acetic acid (2S,4S,6R)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2-{(S)-4-[2-(tert-butyl-diphenyl-silanyloxy)-eth-(Z)-ylidene]-6-formyl-tetrahydro-pyran-2-ylmethyl}-2-methoxy-3,3-dimethyl-tetrahydro-pyran-4-yl ester 在
aluminum oxide 作用下,
以
二氯甲烷 为溶剂,
生成 Acetic acid (2S,4S,6R)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2-{(2S,6R)-4-[2-(tert-butyl-diphenyl-silanyloxy)-eth-(Z)-ylidene]-6-formyl-tetrahydro-pyran-2-ylmethyl}-2-methoxy-3,3-dimethyl-tetrahydro-pyran-4-yl ester