作者:Luigi Aurelio、Bernard L. Flynn、Peter J. Scammells
DOI:10.1039/c0ob01156h
日期:——
2-Amino-3-acylthiophenes are known to allosterically modulate the A1adenosine receptor and are also used as intermediates in the synthesis of therapeutic agents and pharmacophores such as thienoazepines and thienopyrimidines. The N-alkylation of 2-aminothiophenes has been notoriously difficult to accomplish under mild conditions and there are very few examples of N-alkylated 2-aminothiophenes in the literature, all of which use forcing conditions to effect the alkylation. Here we describe the synthesis of such compounds under mild conditions utilising 2-carbamoylamino and 2-acylamino-3-acylthiophenes with caesium carbonate, and tetrabutylammonium iodide in DMF.
2-氨基-3-酰基噻吩已知能变构性调节A1腺苷受体,并且也被用作合成治疗药物和药效团的中间体,如噻唑衍生物和噻唑嘧啶。2-氨基噻吩的N-烷基化在温和条件下 notoriously 难以实现,文献中关于N-烷基化的2-氨基噻吩的例子非常少,且所有这些都采用强迫条件来进行烷基化。在此,我们描述了在温和条件下合成此类化合物的方法,使用2-氨基酰氨和2-酰基氨基-3-酰基噻吩与碳酸铯及四丁基氨盐碘化物在DMF中反应。