House-Meinwald rearrangement of aryl-substituted epoxysulfones in hexafluoroisopropanol (HFIP)
作者:Alexandria Uritis、Hannah Phillips、Hunter Phillips、Thomas C. Coombs
DOI:10.1016/j.tetlet.2023.154716
日期:2023.9
β-Aryl-substituted α,β-epoxysulfones undergo House-Meinwald rearrangement to form α-aryl, α-sulfonyl aldehydes in high yields upon dissolution in hexafluoroisopropanol (HFIP), and in some cases, heating. These compounds are typically isolated as the corresponding alcohols following reduction with NaBH4. The β-aryl group is generally required for rearrangement and a variety of substitution patterns
β-芳基取代的 α,β-环氧砜在溶解于六氟异丙醇 (HFIP) 中并在某些情况下加热后,会发生 House-Meinwald 重排,以高产率形成 α-芳基, α-磺酰醛。这些化合物通常在用NaBH 4还原后分离为相应的醇。重排通常需要β-芳基,并且可以容忍多种取代模式。还报道了将苯基取代的环氧砜转化为相应的β-氨基砜的一锅重排/还原胺化序列。环氧砜重排底物可通过醛与氯甲基芳基砜的 Darzens 反应直接获得,而氯甲基芳基砜本身可通过磺酰氯或亚磺酸盐的一锅转化获得。