Transition-Metal-Free Approach to 4-Ethynylpyrimidines via Alkenynones
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