Highly Enantioselective Reduction of β-Amino Nitroolefins with a Simple N-Sulfinyl Urea as Bifunctional Catalyst
作者:Xiang-Wei Liu、Yan Yan、Yong-Qiang Wang、Chao Wang、Jian Sun
DOI:10.1002/chem.201201192
日期:2012.7.23
Simple but effective: A structurally simple N‐sulfinyl urea was found to be a highly efficient bifunctionalcatalyst, which allows for the development of a novel pathway for the construction of chiral β‐amino nitroalkanes through enantioselectivereduction of β‐amino nitroolefins by trichlorosilane. High yields and excellent enantioselectivities were obtained for a broad range of β‐arylamino nitroolefin
Cascade reaction of isatins with nitro-substituted enamines: highly selective synthesis of functionalized (<i>Z</i>)-3-(1-(arylamino)-2-oxoarylidene)indolin-2-ones
作者:Cong-Hai Zhang、Rong Huang、Xia Qing、Jun Lin、Sheng-Jiao Yan
DOI:10.1039/d0cc00923g
日期:——
A novel protocol for the construction of functionalized (Z)-3-(1(-arylamino)-2-oxoarylidene)indolin-2-ones (AOIDOs) from isatins 1 with nitro-substituted enamines 2via an unprecedented cascade reaction catalyzed by sulfamic acid is developed.
Cadogan reductive cyclization of substituted 2-aryl-3-nitropyridines to give δ-carbolines was performed under MoO2Cl2(DMF)2 catalysis with triphenylphosphine as a ligand. A new approach for the synthesis of the alkaloid quindoline based on a Mo(VI)-catalyzed Cadogan reductive cyclization of 2-phenyl-3-nitro-5,6,7,8-tetrahydroquinoline followed by aromatization of the resulting 2,3,4,10-tetrahydro-1H-indolo[3