作者:Pavel R. Golubev、Alena S. Pankova、Mikhail A. Kuznetsov
DOI:10.1002/ejoc.201402045
日期:2014.6
A practical approach to the synthesis of 4-ethynylpyrimidines by the condensation of arylamidines with 2-aryl-1-ethoxy-5-(trimethylsilyl)pent-1-en-4-yn-3-ones has been developed. As these latter ketones are easily accessible from bis(trimethylsilyl)acetylene and arylacetyl chlorides, the regioselective condensation reported herein provides a facile access to both TMS-protected and unprotected 4-ethynylpyrimidines
已经开发了一种通过芳脒与 2-芳基-1-乙氧基-5-(三甲基甲硅烷基)pent-1-en-4-yn-3-ones 缩合合成 4-ethynylpyrimidines 的实用方法。由于这些后一种酮很容易从双(三甲基甲硅烷基)乙炔和芳基乙酰氯获得,本文报道的区域选择性缩合提供了以高达 85% 的产率轻松获得 TMS 保护和未保护的 4-乙炔基嘧啶的途径。