Efficient Benzimidazolidinone Synthesis via Rhodium-Catalyzed Double-Decarbonylative C–C Activation/Cycloaddition between Isatins and Isocyanates
作者:Rong Zeng、Peng-hao Chen、Guangbin Dong
DOI:10.1021/acscatal.5b02532
日期:2016.2.5
isocyanates can be efficiently coupled with broad functional group tolerance. A modified one-pot process combining a Curtius rearrangement and C–C activation was also achieved by using acyl azides as the starting materials. A detailed mechanistic study revealed a surprising double-decarbonylative reaction pathway. The novel reactivity discovered in this basic research is expected to shed light on the
据报道,应变较小的环状酮(靛红)与异氰酸酯的第一次脱羰基环加成反应。由C–C活化引发的这种独特的[5-2 + 2]转化提供了快速进入各种苯并咪唑啉酮衍生物的途径,并且广泛的异氰酸酯可以有效地结合宽泛的官能团耐受性。通过使用酰基叠氮化物作为起始原料,还实现了结合Curtius重排和C–C活化的改良一锅法。详细的机理研究表明,令人惊讶的双脱羰反应路径。这项基础研究中发现的新型反应性有望为通过C–C /异氰酸酯偶联的新型杂环形成方法的开发提供启发。