Unexpected Smiles Rearrangement During Borane Reduction of 2-Aryloxy-2-methylpropionamides
作者:Hans-Peter Buchstaller、Uwe Anlauf
DOI:10.1055/s-2004-837302
日期:——
2-Nitrophenols spontaneously rearrange during alkylation with 2-bromo-2-methylpropionamide in the presence of cesium carbonate in acetonitrile to the corresponding 2-hydroxy-2-methyl-N-(2-nitrophenyl)propionamides. Upon reduction of 2-aryloxy-2-methylpropionamides, which were obtained from 2-nitrophenols in three steps, with borane dimethyl sulfide complex in THF, a Smiles rearrangement was observed as well
2-硝基苯酚在乙腈中碳酸铯存在下与 2-溴-2-甲基丙酰胺烷基化过程中自发重排为相应的 2-羟基-2-甲基-N-(2-硝基苯基)丙酰胺。在将 2-芳氧基-2-甲基丙酰胺(由 2-硝基苯酚分三步获得)与硼烷二甲硫醚在 THF 中的络合物还原后,还观察到了 Smiles 重排,生成了 2-甲基-1-苯基氨基丙-2-醇. 这两种方法都可以获得有价值的 2-硝基取代的苯胺衍生物。