Pd-catalysed general access to 7-membered N/O-heterocyclic compounds as potential agents against inflammation
作者:B. Thirupataiah、Gangireddy Sujeevan Reddy、Guntipally Mounika、Jetta Sandeep Kumar、Kazi Amirul Hossain、Jayesh Mudgal、Jessy E. Mathew、Gautham G. Shenoy、Marina Rajadurai、Kishore V. L. Parsa、Manojit Pal
DOI:10.1039/d1cc04140a
日期:——
A Pd-catalysed regioselective synthesis of 4,5-disubstituted 7-membered N/O-heterocycles was achieved via the 7-endo-dig cyclization followed by C–C bond formation of 2-(1-alkynyl)phenylacetamide. The ligand/additive free cascade reaction proceeded in the presence of PdCl2 in aqueous MeCN when the separate and individual use of methyl vinyl ketone and allyl bromide generally afforded an O- and N-heterocycle
Regioselective Synthesis of 3-Benzazepinones and Unexpected 5-Bromo-3-benzazepinones
作者:Lei Zhang、Deju Ye、Yu Zhou、Guannan Liu、Enguang Feng、Hualiang Jiang、Hong Liu
DOI:10.1021/jo100378u
日期:2010.6.4
A regioselective hydroamidation of 2-(1-alkynyl)phenylacetamides with Au(PPh3)Cl/AgSbF6 as the catalyst proceeded by a 7-endo-dig pathway to afford 3-benzazepinones. This method accommodates a broad range of alkyl and aryl alkynyl substitutes in moderate to high yields (63−91%). Moreover, unexpectedly, we also discovered a gold-mediated transformation from 2-(1-alkynyl)phenylacetamides to 5-bromo-3-benzazepinones