Palladium-Catalyzed Double Carbopalladation/syn-Insertion Cascade toward a Pragmatic Synthesis of Aminated Polyheterocyclic 1,2-Benzothiazepine 1-Oxides
作者:Zhiyuan Chen、Zhigang Huang、Longji Dai
DOI:10.1055/a-1975-4377
日期:2023.3
synthesis of aminated tetracyclic 1,2-benzothiazepine 1-oxides bearing a highly fused medium-sized cyclic unit. An acetyl (Ac) group was found to be the optimal protecting group for sulfoximines to reduce the nucleophilic ability of the N atom, thus efficiently suppressing the formation of intramolecular 5-exo-dig cyclization side products. The transformation proceeds through a double syn-carbopalladation/annulation
A Sequential Metal-Catalyzed C−N Bond Formation in the Synthesis of 2-Amido-indoles
作者:Pei-Yuan Yao、Yu Zhang、Richard P. Hsung、Kang Zhao
DOI:10.1021/ol801711p
日期:2008.10.2
A sequential metal-catalyzed C-N bond formation employing ortho-haloaryl acetylenic bromides is described. The initial amidation is highly selective for C-sp-N bond formation, leading to o-haloaryl-substituted ynamides that can be useful building blocks, while the overall sequence provides a facile construction of 2-amido-indoles.