碘仿 、
Acetic acid (2R,4R,6S)-2-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-4-oxo-butyl]-6-(2,2-dimethyl-4-oxo-4H-benzo[1,3]dioxin-5-ylmethyl)-tetrahydro-pyran-4-yl ester 在
chromium dichloride 作用下,
以
四氢呋喃 为溶剂,
反应 3.0h,
生成 Acetic acid (2R,4R,6S)-2-[(Z)-(S)-2-(tert-butyl-dimethyl-silanyloxy)-5-iodo-pent-4-enyl]-6-(2,2-dimethyl-4-oxo-4H-benzo[1,3]dioxin-5-ylmethyl)-tetrahydro-pyran-4-yl ester 、 [(2R,4R,6S)-2-[(E,2S)-2-[tert-butyl(dimethyl)silyl]oxy-5-iodopent-4-enyl]-6-[(2,2-dimethyl-4-oxo-1,3-benzodioxin-5-yl)methyl]oxan-4-yl] acetate