13160-07-1Relevant articles and documents
1H and 13C NMR spectral studies of conformation of some N-(2-pyridinyl)-3-pyridinecarboxamides
Singha, Netai C.,Sathyanarayana
, p. 91 - 98 (1998)
The 1H and 13C NMR spectra of N-(2-pyridinyl)-, N-(4-methyl2-pyridinyl)-, and N-(6-methyl-2-pyridinyl)-3-pyridinecarboxamides (1-3, respectively) and 3-pyridinecarboxamide (4) in different solvents have been analysed using COSY, HETCOR, chemical shift and coupling constant correlations. The conformations of 1-4 have been obtained by utilizing the NMR spectra, NOE experiments and MINDO/3 calculations. In dilute solutions, the 2-pyridyl ring is coplanar with the amide group while the 3-pyridyl ring is apparently not. Compounds 1-3 dimerize through cooperative hydrogen bonding in concentrated CDCl3 solution (approximately 0.1 M) and the structure of the dimer resembles some of the DNA base-pairs. Hydrogen bonding between N-H and the solvent molecules hinders dimerization in (CD3)2CO and CD3CN.
1H and 13C NMR Study of N-(3-pyridinyl)-2-pyridinecarboxamide and N,N′-bis(2-pyridinyl)-1,3-benzenedicarboxamide
Singha, Netai C.,Anand, Jayashree,Sathyanarayana
, p. 1459 - 1462 (1997)
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Mapping out the Relative Influence of Hydrogen and Halogen Bonds in Crystal Structures of a Family of Amide-Substituted Pyridines
Abeysekera, Amila M.,Day, Victor W.,Sinha, Abhijeet S.,Aaker?y, Christer B.
, p. 7399 - 7410 (2020)
The simultaneous use of hydrogen bonds and halogen bonds in crystal engineering strategies has previously been employed in order to generate new solid forms with applications in e.g. pharmaceutical and agrochemical industries. Unfortunately, it is not eas
Microwave-assisted heteropolyanion-based ionic liquid promoted sustainable protocol to N-heteroaryl amides via N-directing dual catalyzed oxidative amidation of aldehydes
Fu, Renzhong,Yang, Yang,Jin, Weihua,Gu, Hui,Zeng, Xiaojun,Chai, Wen,Ma, Yunsheng,Wang, Quan,Yi, Jun,Yuan, Rongxin
, p. 107699 - 107707 (2016/11/29)
A sustainable procedure for the synthesis of N-heteroaryl amides directly from oxidative amidation of aldehydes catalyzed by heteropolyanion-based ionic liquids under microwave-promoted conditions has been reported. The transformation has proven to tolerate a wide range of aldehydes and amino heterocycles with different functional groups. Moderate to excellent yields, solvent-free media, operational simplicity and reusability of catalysts are the main highlights. Furthermore, the proposed N-directing dual-catalysis mechanistic pathway was briefly investigated in this report.