An effective and general method for the highly regioselective synthesis of 1-phenylpyrazoles from β-enaminoketoesters, tandem Blaise–acylation adducts
作者:Young Ok Ko、Yu Sung Chun、Cho-Long Park、Youngmee Kim、Hyunik Shin、Sungho Ahn、Jongki Hong、Sang-gi Lee
DOI:10.1039/b820324e
日期:——
effective and general route for the regioselective synthesis of 1-phenylpyrazoles has been developed from β-enaminoketoesters prepared by tandem Blaise–acylation. This method is applicable to a very broad range of substrates, generating a diverse set of 3-aryl-5-alkyl, 3-alkyl-5-aryl, 3,5-diaryl, and 3,5-dialkyl substituted pyrazoles regioselectively. The dichotomous regioselective synthesis of isotopically
从通过串联布莱斯酰化反应制得的β-烯胺酮酯中,已经开发出一种有效的,通用的区域选择性合成1-苯基吡唑的途径。该方法适用于非常广泛的底物,可选择性地产生各种不同的3-芳基-5-烷基,3-烷基-5-芳基,3,5-二芳基和3,5-二烷基取代的吡唑。同位素区分的3-CD 3 -5-CH 3和3-CH 3 -5-CD 3取代的吡唑的二分类区域选择性合成显示了该方案的强大功能。