Toward versatile methods leading to highly functionalized imidazo[1,2-a]pyridines
摘要:
A convenient and general method of preparation of polyfunctionalized imidazo[1,2-a]pyridines is reported. This methodology involves activation of secondary amides leading to the formation of the corresponding amidines 9. Different activating reagents have been evaluated and the efficiency of PCl5 was illustrated with alkyl functionalized groups. (C) 2012 Elsevier Ltd. All rights reserved.
Aminocarbonylation of N-Containing Heterocycles with Aromatic Amines Using Mo(CO)6
作者:Sandrine Piguel、Marius Mamone、Jessy Aziz、Julie Le Bescont
DOI:10.1055/s-0037-1609152
日期:2018.4
aminocarbonylation of nitrogen-containing heterocycles with anilinederivatives using molybdenum hexacarbonyl as a CO solid source, expanding the scope of the limited examples. This method is compatible with a variety of substitutions on the aniline moiety. The simple reaction conditions include easily available Pd(dppf)Cl2 catalyst, DBU as base in DMF at 120 °C for 3 hours in sealed tube thereby leading to the isolation
The simple and inexpensive N,N-dimethylcyclohexane-1,2-diamine/CuI catalytic system provides a versatile, easy and efficient access to an array of N-(2-pyridin-2-yl)-amides from 2-chloro-pyridine derivatives.
Mapping out the Relative Influence of Hydrogen and Halogen Bonds in Crystal Structures of a Family of Amide-Substituted Pyridines
作者:Amila M. Abeysekera、Victor W. Day、Abhijeet S. Sinha、Christer B. Aakeröy
DOI:10.1021/acs.cgd.0c01086
日期:2020.11.4
Bz-I and 2Pyr-I, the primary hydrogenbonding resembled that of the other members of the family, indicating that the interactions mediated via the iodine atom were complementary to rather than competitive with the hydrogen bonds. Two polymorphs of 4Pyr-I were found, and in both forms, a halogenbond was formed with the N(py) acceptor which was engaged in N–H···N hydrogen bonds in the other members of
A procedure for the synthesis of N-heteroaryl amides directly from oxidative amidation of aldehydes catalyzed by heteropolyanion-based ionic liquids has been reported. The proposed N-directing dual-catalysis mechanism was briefly investigated.
A palladium-catalysed aminocarbonylation of (hetero)aryliodides has, for the first time, been accomplished in deep eutectic solvents as environmentally benign and recyclable media, under mild conditions. The reactions proceeded with a good substrate scope, and a variety of amides have been synthesized in yields up to 98%.