Copper-Catalyzed Aerobic Spirocyclization of Biaryl-N-H-imines via 1,4-Aminooxygenation of Benzene Rings
摘要:
A synthetic method of azaspirocyclohexadienones has been developed through copper-catalyzed aerobic spirocyclization of biaryl-N-H-imines prepared by the reaction of biarylcarbonitriles and Grignard reagents.
Directed ortho metalation - cross coupling connections. Remote lateral metalation - cyclization of 2-imino-2′-methyl biaryls to 9-aminophenanthrenes. A synthesis of the alkaloid piperolactam C
coupling protocol, undergo lithium diethyl amide-mediated metalation - cyclization to give 9-aminophenanthrenes (Table 1). The application of this new general methodology to the first synthesis of the alkaloidpiperolactamC (9) is described.
Copper-Catalyzed Aerobic Spirocyclization of Biaryl-<i>N</i>-H-imines via 1,4-Aminooxygenation of Benzene Rings
作者:Ya Lin Tnay、Cheng Chen、Yi Yuan Chua、Line Zhang、Shunsuke Chiba
DOI:10.1021/ol301583y
日期:2012.7.6
A synthetic method of azaspirocyclohexadienones has been developed through copper-catalyzed aerobic spirocyclization of biaryl-N-H-imines prepared by the reaction of biarylcarbonitriles and Grignard reagents.
Amide-Directed C−H Sodiation by a Sodium Hydride/Iodide Composite
作者:Yinhua Huang、Guo Hao Chan、Shunsuke Chiba
DOI:10.1002/anie.201702512
日期:2017.6.1
A new protocol for amide-directed ortho and lateral C-H sodiation is enabled by sodiumhydride (NaH) in the presence of either sodium iodide (NaI) or lithium iodide (LiI). The transient organosodium intermediates could be transformed into functionalized aromatic compounds.