One-Pot Two-Component [3 + 2] Cycloaddition/Annulation Protocol for the Synthesis of Highly Functionalized Thiophene Derivatives
作者:Ganesh Chandra Nandi、Subhasis Samai、Maya Shankar Singh
DOI:10.1021/jo200685e
日期:2011.10.7
An efficient and experimentally rapid protocol for the synthesis of hitherto unreported 2,3-dicarboalkoxy-4-aroyl/heteroaroyl/alkanoyl thiophenes has been developed via 1–2 (C–S) and 3–4 (C–C) bond connections promoted by 4-dimethylaminopyridine (DMAP). Optimally, the reaction takes only 3–5 min when β-oxodithioester and dialkyl acetylenedicarboxylate are stirred in DCM at room temperature in the presence
通过合成1–2(C–S)和3–4(C–C)的键连接,已开发出一种高效且实验快速的方案,用于合成迄今未报道的2,3-二芳烷氧基-4-芳酰基/杂芳酰基/烷酰基噻吩通过4-二甲基氨基吡啶(DMAP)。最佳的情况是,在室温下在DMAP的存在下于DCM中搅拌β-氧二硫代酯和乙酰二羧酸二烷基酯时,反应仅需3-5分钟。该方法允许干净且常规地合成以前无法获得的且需要合成的含有二茂铁基的噻吩。该过程的速度,实验简便性和高产量是对访问此重要子结构的现有方法的改进。