Reactions of β-b-halosulphones with bases and silver salts: the sulphonyl group as a weak anchimeric assistant
作者:J.C. Carretero、J.L. Garcia Ruano、M.C. Martinez、J.H. Rodriquez
DOI:10.1016/s0040-4020(01)90317-5
日期:1987.1
and -1,2-dimethyl (and 1,2-diphenyl)-2-halo-1-methylsulphonylethanes in their reactions with NH4OH/CH3CN, NaOH/MeOH and AgBF4/MeOH is described. The participation is not detected in any case on butane derivatives or on 1,2-diphenyl-ethane derivatives with basic nucleophiles, which yielded mainly elimination products. Reactions of the last compounds with AgBF4/MeOH only afforded mixtures of substitution
为了获得有关砜基团作为嵌合助剂的能力的证据,及-1,2-二甲基(和1,2-二苯基)-2-卤-1-甲基磺酰乙烷与NH 4 OH的反应行为描述了/ CH 3 CN,NaOH / MeOH和AgBF 4 / MeOH。在任何情况下,丁烷衍生物或带有碱性亲核试剂的1,2-二苯乙烷衍生物均未检测到参与,主要产生消除产物。最后的化合物与AgBF 4 / MeOH的反应仅提供取代产物的混合物,在那些情况下,主要与起始砜的构型相同。-衍生物,其必须仅通过SN1机制与嵌合辅助过程竞争而进化。这是第一个报道的结果,表明磺酸的弱亲核特性可以决定其作为嵌合助剂参与β-位好离去基团的取代。