Palladium(<scp>ii</scp>)-catalysed regioselective synthesis of 3,4-disubstituted quinolines and 2,3,5-trisubstituted pyrroles from alkenes via anti-Markovnikov selectivity
作者:Gopal Chandru Senadi、Wan-Ping Hu、Amol Milind Garkhedkar、Siva Senthil Kumar Boominathan、Jeh-Jeng Wang
DOI:10.1039/c5cc05196g
日期:——
A novel strategy has been identified for the regioselective synthesis of 3,4-disubstituted quinolines and 2,3,5-trisubstituted pyrroles through anti-Markovnikov selectivity.
Herein, a new strategy for the directsynthesis of functionalized pyrroles from β-aminoalcohols and ynones via ruthenium-catalyzed acceptorless dehydrogenative coupling has been demonstrated. This developed methodology proceeds in an atom- and step-economic fashion together with the merits of broad substrate scope, operational simplicity, and water and hydrogen gas as the sole by-products, which provides
A convenient, “one-pot” synthesis of trisubstituted pyrroles via a Ru(II)-catalyzed, Cu(II)-mediated reaction of substituted isoxazoles with sulfonylhydrazones has been developed. A series of highly functionalized pyrroles are obtained via a synergistic formation of new C−C and C−N bonds. Mechanistic investigations were carried out to propose the plausible pathway. This protocol provides a facile and
通过Ru( II ) 催化的、Cu( II ) 介导的取代异恶唑与磺酰腙的反应,一种方便的“一锅法”合成三取代吡咯得到了开发。通过新的 C-C 和 C-N 键的协同形成,获得了一系列高度功能化的吡咯。进行了机制研究以提出合理的途径。该协议为合成各种带有吡咯骨架的杂环化合物提供了一种简便快捷的方法。
Substituent-Controllable Cascade Regioselective Annulation of β-Enaminones with N-Sulfonyl Triazoles for Modular Access to Imidazoles and Pyrroles
作者:Hua Wang、Tongtong Zhou、Mengdi Wu、Qingqing Ye、Xinwei He
DOI:10.3390/molecules28114416
日期:——
A controllable synthesis of trisubstitutedimidazoles and pyrroles has been developed through rhodium(II)-catalyzed regioselective annulation of N-sulfonyl-1,2,3-trizaoles with β-enaminones. The imidazole ring was formed through a 1,1-insertion of the N-H bond to α-imino rhodium carbene, followed by a subsequent intramolecular 1,4-conjugate addition. This occurred when the α-carbon atom of the amino