A convenient approach to β-heteroarylated (C–N bond) ketones from Cs2CO3 promoted reaction between propargyl alcohols and nitrogen-heterocycles
作者:M. Bhanuchandra、Malleswara Rao Kuram、Akhila K. Sahoo
DOI:10.1039/c2ob25165e
日期:——
effectively undergo redox-isomerization conjugate addition (RICA) with NH-heteroarenes. Reaction of 3-substituted pyrazoles or indazole with propargyl alcohols enables highly regioselective products. A diverse range of NH-bearing nucleophiles such as: pyrazoles, imidazole, triazoles, pyrrole, indoles and aniline participate in this reaction and deliver the corresponding β-heteroarylated ketones.
证明了一种有效且直接的方法来处理β-杂芳基化(C–N键)酮。碱促进的氧化还原异构化炔丙醇制备α-β-不饱和酮,然后将共轭物添加到NH-杂芳烃中,可得到范围广泛的β-杂芳基化酮,收率好至极好。含有未活化的炔丙醇的芳基,杂芳基,烷基C(sp)和末端炔烃可与NH-杂芳烃有效地进行氧化还原-异构化共轭加成反应(RICA)。3-取代的吡唑或吲唑与炔丙醇一起使用可实现高度区域选择性的产品。多种含NH的亲核试剂,例如:吡唑,咪唑,三唑 吡咯,吲哚和 苯胺 参与该反应并提供相应的β-杂芳基化酮。