An easy synthesis of the 2-phenylsulfonyl-substituted allylic bromides and acetates and their reactivity towards nucleophiles
作者:P. Auvray、P. Knochel、J.F. Normant
DOI:10.1016/s0040-4039(00)85142-4
日期:1986.1
The reaction of phenyl vinyl sulfone with various aldehydes in the presence of a catalytic amount of DABCO furnishes in good yields teh corresponding 2-phenylsulfonyl-substituted alcohols which can be easily converted into their acetates or into their allylically rearranged bromides . These reagents, in turn, react with nucleophides (ketone enolates and cuprates) with an allylic rearrangement (SN2′
在催化量的DABCO存在下,苯基乙烯基砜与各种醛的反应以良好的产率提供了相应的2-苯基磺酰基取代的醇,其可以容易地转化为其乙酸盐或烯丙基重排的溴化物。这些试剂,又与nucleophides(酮烯醇化物和铜酸盐)与烯丙基重排(S反应Ñ 2'机构),得到不饱和的官能化砜和。钯催化的反应使砜能够立体控制地转变为(Z,Z)跳过的1,4-二烯。