Combination of the Suzuki–Miyaura cross-coupling and nucleophilic aromatic substitution of hydrogen (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:msup><mml:mrow><mml:msub><mml:mtext>S</mml:mtext><mml:mtext>N</mml:mtext></mml:msub></mml:mrow><mml:mtext>H</mml:mtext></mml:msup></mml:mrow></mml:math>) reactions as a versatile route to pyrimidines bearing thiophene fragments
作者:Egor V. Verbitskiy、Ekaterina M. Cheprakova、Pavel A. Slepukhin、Mikhail I. Kodess、Marina A. Ezhikova、Marina G. Pervova、Gennady L. Rusinov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.1016/j.tet.2012.04.095
日期:2012.7
of hydrogen is a versatile method for the synthesis of 4-(thiophen-2-yl)-, 5-(thiophen-2-yl)-, and 4,5-di(thiophen-2-yl) substituted pyrimidines from the commercially available 5-bromopyrimidine. The SNH (AE)- and SNH (AO)-reactions of 5-bromopyrimidine with thiophene and 2-bromothiophene have been studied by gas–liquid chromatography/mass-spectrometry. The structures of intermediate σH-adducts, as well
研究表明,Suzuki-Miyaura交叉偶联和亲核氢取代反应是合成4-(噻吩-2-基)-,5-(噻吩-2-基)-,和来自市售的5-溴嘧啶的4,5-二(噻吩-2-基)取代的嘧啶。这小号ñH (AE)-和 小号ñH气相色谱/质谱法研究了5-溴嘧啶与噻吩和2-溴噻吩的(AO)反应。中间σ的结构ħ -adducts,以及噻吩(噻吩基)嘧啶和bithiophene-(噻吩基)嘧啶二分体已首先通过X射线晶体学分析确定。