Silver-mediated radical coupling reaction of isocyanides and alcohols/phenols in the presence of water: unprecedented hydration and radical coupling reaction sequence
作者:Lin Zhang、Pin Xiao、Xiaoxue Guan、Zhouliang Huang、Jingping Zhang、Xihe Bi
DOI:10.1039/c7ob00019g
日期:——
The radical coupling of isocyanides and alcohols/phenols promoted by silver in the presence of water is reported for the first time, which led to the formation of diverse carbamates. In contrast to the well-known 1,1-addition to form imidoyl radicals, a novel reaction mechanism, involving sequential hydration of isocyanides and coupling with alkoxyl/phenoxyl radicals, is disclosed by combining experimental
Use of chiral glycerol 2,3-carbonate in the synthesis of 3-aryl-2-oxazolidinones
作者:S. Jegham、A. Nedelec、Ph. Burnier、Y. Guminski、F. Puech、J.J. Koenig、P. George
DOI:10.1016/s0040-4039(98)00814-4
日期:1998.6
Substituted chiral 3-aryl-2-oxazolidinones were readily prepared via regiospecific opening of cyclic carbonates with N-arylcarbamates and subsequent cyclization.
Rhodium-Catalyzed Oxidative Coupling Reaction of Isocyanides with Alcohols or Amines and Molecular Oxygen as Oxygen Source: Synthesis of Carbamates and Ureas
The first Rh-catalyzed aerobic oxidative coupling reaction of isocyanides with alcohols or amines has been developed. The reaction takes place under very mild conditions, by using air as the terminal oxidant and oxygen-atom source. It provides a simple, efficient, and general method for the construction of N-arylcarbamates and ureas in an atom-economic manner. Moreover, the new mechanism, involving
Ceric Ammonium Nitrate Promoted Highly Chemo‐ and Regioselective o
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‐Nitration of Anilines under Mild Conditions
作者:Zafar Iqbal、Asha Joshi、Saroj Ranjan De
DOI:10.1002/ejoc.202200746
日期:2022.8.19
practical strategy for cericammoniumnitrate promoted highly chemo- and regioselective ortho-nitration of aniline carbamates has been developed under mild and neutral conditions without the requirement of additional catalyst and oxidant. Both electron rich and highly electron-deficient anilines afforded good to excellent yields of the desired products with outstanding functional groups tolerance.
We have gold-catalyzed C–N cross-couplings of aryl iodides with aliphatic nitriles. Although nitriles are usually challenging nitrogen cross-coupling partners, they could be activated by base-mediated deprotonation and isomerization. The method utilizes widely available substrates in moderate to good yields to provide various N-aryl compounds. In addition, a similar strategy could be extended to the