2-Aminopyridines via Reaction of Pyridine N-Oxides and Activated Isocyanides
摘要:
A practical and efficient method for the synthesis of substituted 2-aminopyridines from pyridine N-oxides is reported. Yields of purified, isolated products of up to 84% are observed for the one-pot, two-step process. The reaction involves an in situ deprotection of an isolable N-formylaminopyridine intermediate and facilitates the synthesis of 2-aminopyridines for which other methods fail.
A new strategy is developed for the synthesis of 1-aminoisoquinoline derivatives. This Rh(III)-catalyzed [4 + 2] annulation reaction employs benzamidines as efficient directing groups and the vinylenecarbonate as an acetylene surrogate. Additionally, the reaction features broad substrate scopes and good yields, only producing carbonate anion as byproduct.
common structure found in drug agents, natural products and fine chemicals. Reported herein is an alternative access to heteroarylamine via radical-radical cross-coupling pathway, powered by visible light catalysiswithout any aid of externaloxidant and reductant. Only by visible light irradiation of a photocatalyst such as a metal-free photocatalyst, a cascade single electron transfer event of amines
157. Synthetic antimalarials. Part XXVII. Some derivatives of phthalazine, quinoxaline, and isoquinoline
作者:Robert D. Haworth、Stanley Robinson
DOI:10.1039/jr9480000777
日期:——
2-Aminopyridines via Reaction of Pyridine <i>N</i>-Oxides and Activated Isocyanides
作者:Mitchell Vamos、Nicholas D. P. Cosford
DOI:10.1021/jo402693s
日期:2014.3.7
A practical and efficient method for the synthesis of substituted 2-aminopyridines from pyridine N-oxides is reported. Yields of purified, isolated products of up to 84% are observed for the one-pot, two-step process. The reaction involves an in situ deprotection of an isolable N-formylaminopyridine intermediate and facilitates the synthesis of 2-aminopyridines for which other methods fail.
Hypervalent iodine(<scp>iii</scp>) catalyzed oxidative C–N bond formation in water: synthesis of benzimidazole-fused heterocycles
作者:D. Nageswar Rao、Sk. Rasheed、Ram A. Vishwakarma、Parthasarathi Das
DOI:10.1039/c4ra02279c
日期:——
A diverse array of benzimidazole-fused heterocycles was synthesized by in situ generated hypervalent iodine(iii) catalyzed intramolecular oxidative C–N bond formation in water and under ambient conditions.