Stereoselective synthesis of substituted all-trans 1,3,5,7-octatetraenes by a modified Ramberg–Bäcklund reaction
作者:Xiao-Ping Cao
DOI:10.1016/s0040-4020(01)01224-8
日期:2002.2
The reaction of allylic dienylic sulfone with dibromodifluoromethane in the presence of alumina-supported KOH in dichloromethane solution results in facile rearrangement affording the corresponding all-trans 1,3,5,7-octatetraenes in excellent yields. This result shows that the double bonds of stereochemically defined allylic dienylic sulfone retain their stereochemistry and the newly formed double
烯丙基二烯基砜与二溴二氟甲烷在二氯甲烷溶液中的氧化铝负载KOH的反应导致容易的重排,从而以优异的收率提供了相应的全反式1,3,5,7-辛酸酯。该结果表明,在改良的Ramberg-Bäcklund方法中,立体化学定义的烯丙基二烯基砜的双键保留了其立体化学,新形成的双键具有(E)-构型。