3'',3'''-dichloro-4'',4'''-bis(o-carboxybenzyloxy)-5'',5'''-bis(o-carboxybenzyloxycarbonyl)-4',4'-diphenyl-3β-<1-(3'-butenyl)>cholestane tetramethyl ester 在
potassium cyanide 、
potassium carbonate 作用下,
以
乙醇 为溶剂,
反应 10.0h,
以32%的产率得到3'',3'''-dichloro-4'',4'''-bis(o-carboxybenzyloxy)-5'',5'''-dicarboxy-4',4'-diphenyl-3β-<1-(3'-butenyl)>cholestane