(5Z,7E)-(1S,3R)-1,3-bis<(t-butyldimethylsilyl)oxy>-9,10-secochola-5,7,10(19)-trien-24-ol 、
对甲苯磺酰氯 在
吡啶 作用下,
反应 3.0h,
以80%的产率得到Toluene-4-sulfonic acid (R)-4-{(1R,3aS,7aR)-4-[2-[(3S,5R)-3,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-pentyl ester