Copper-Catalyzed Tandem <i>O</i>-Vinylation of Arylhydroxylamines/[3,3]-Rearrangement/Cyclization: Synthesis of Highly Substituted Indoles and Benzoindoles
arylhydroxylamine using vinyliodonium salts as vinylation reagents to generate a transient O-vinyl-N-arylhydroxylamine that rapidly undergoes a [3,3]-sigmatropic rearrangement and subsequent cyclization/rearomatization to form a substituted indole. A wide range of highly substituted indoles and benzoindoles can be afforded in good yields. This approach is readily scalable, and the scope and application of this process
Preparation, properties and infrared spectral studies of N-(p-ethylphenyl)thiobenzohydroxamic acid
作者:Rita Kakkar、Amita Dua、Sheza Zaidi
DOI:10.1016/j.saa.2007.02.021
日期:2007.12
The preparation of N-(p-ethylphenyl)thiobenzohydroxamic acid and its spectralproperties are described in this paper. The preferred conformation of the acid is investigated by both infrared techniques and theoretical calculations at the DFT level. It is found that the acid exists in the cis thione (Z) form, rather than the trans form (E) in the gas phase. Both infrared spectroscopy and theoretical
Synthesis of <i>ortho</i>-Phosphated (Hetero)Arylamines through Cascade Atherton–Todd Reaction/[3,3]-Rearrangement from Arylhydroxylamines and Dialkyl Phosphites
作者:Xiao Liu、Jingtai Pei、Zhiwei Gao、Hongyin Gao
DOI:10.1021/acs.orglett.2c03269
日期:2022.10.21
practical and facile strategy for the synthesis of ortho-phosphated (hetero)arylamines from readily available arylhydroxylamines and dialkyl phosphites via cascade Atherton–Todd reaction/[3,3]-rearrangement was developed. This method is amenable to various arylhydroxylamines such as phenylhydroxylamines, naphthylhydroxylamines, and pyridylhydroxylamines, has mild reaction conditions, is oxidant-free, and