Reformatsky Reaction on Aroylketene<i>S</i>,<i>N</i>-Acetals: A Facile Route to 4-Amino-6-aryl-2<i>H</i>-pyran-2-ones
作者:A. Datta、H. Ila、H. Junjappa
DOI:10.1055/s-1988-27533
日期:——
The aroylketene S,N-acetals 1a-j are shown to undergo regioselective conjugate 1,4-addition with Reformatsky reagent derived from ethyl bromoacetate, followed by cyclization to give novel 4-amino-6-aryl-2H-pyran-2-ones 3a-j in good yields.
结果表明,芳基酮 S,N-乙醛 1a-j 与溴乙酸乙酯衍生的 Reformatsky 试剂发生区域选择性共轭 1,4- Addition 反应,然后进行环化反应,以良好的产率得到新型 4-氨基-6-芳基-2H-吡喃-2-酮 3a-j。