Synthesis of β- and γ-hydroxy sulfones by regioselective opening of β,γ-epoxy sulfones
作者:Carmen Nájera、José Miguel Sansano
DOI:10.1016/s0040-4020(01)90534-4
日期:1990.1
sulfones react regio-selectively with organomagnesium compounds in the presence or not of catalytic amounts of copper(I) bromide to afford β-hydroxy sulfones 2 or γ-tosylated allylic alcoholates 5 respectively. The Michael type addition of Grignard reagents to intermediates 5 in the presence of catalytic amount of copper(l) bromide yields γ-hydroxy sulfones 6. The PCC oxidation of β- and γ-hydroxy sulfones
衍生自烯丙基砜的β,γ-环氧砜1在有或没有催化量的溴化铜(I)存在下与有机镁化合物区域选择性反应,分别得到β-羟基砜2或γ-甲苯磺酸化的烯丙基醇化物5。在催化量的溴化铜(l)存在下,将格氏试剂的迈克尔类型加到中间体5会生成γ-羟基砜6。β-和γ-羟基砜的PCC氧化分别得到β-和γ-氧代砜10和11。对于γ-OXO砜,用DBU处理 得到α-取代的α,β-不饱和羰基化合物。