Formation of imidazopyridines by the phase transfer catalyzed reaction of .alpha.-(aminomethyl)pyridines and CHCl3 with alkaline hydroxide
摘要:
The reaction of chloroform with 2-(aminomethyl)pyridine (1) under basic phase-transfer catalysis affords the highly fluorescent imidazo[1,5-alpha]pyridine (2) in 25% isolated yield. Despite the formation of considerable tarry residue, GC-MS indicates that the volatile fraction of the reaction is simple and consists of 2 and two minor residue, GC-MS indicates that the volatile fraction of the reaction is simple and consists of 2 and two minor components identified as N-(2-pyridylmethyl)formamide (6) and (2-pyridylmethyl)isonitrile (7). The basic phase transfer catalyzed reaction of chloroform with a series of alpha-(aminomethyl)azanaphthalenes was found to be general and yield the corresponding annulated imidazo derivaties in comparable yields. Despite product yields in the 25% range, GC of the reaction mixtures indicates that the volatile fractions generally consist of residual starting aminomethyl compound, the imidazo product, and a minor amount of the (alpha-azanaphthylmethyl)formamide. However, 3-(aminomethyl)isoquinoline (18) failed to provide any of the expected imidazo[1,5-b]isoquinoline (19). The failure to detect 19 was investigated.
Langry Kevin C., Org. Prep. and Proced. Int, 26 (1994) N 4, S 429-438
作者:Langry Kevin C.
DOI:——
日期:——
Langry, Kevin C., Organic Preparations and Procedures International, 1994, vol. 26, # 4, p. 429 - 438
作者:Langry, Kevin C.
DOI:——
日期:——
Formation of imidazopyridines by the phase transfer catalyzed reaction of .alpha.-(aminomethyl)pyridines and CHCl3 with alkaline hydroxide
作者:Kevin C. Langry
DOI:10.1021/jo00007a028
日期:1991.3
The reaction of chloroform with 2-(aminomethyl)pyridine (1) under basic phase-transfer catalysis affords the highly fluorescent imidazo[1,5-alpha]pyridine (2) in 25% isolated yield. Despite the formation of considerable tarry residue, GC-MS indicates that the volatile fraction of the reaction is simple and consists of 2 and two minor residue, GC-MS indicates that the volatile fraction of the reaction is simple and consists of 2 and two minor components identified as N-(2-pyridylmethyl)formamide (6) and (2-pyridylmethyl)isonitrile (7). The basic phase transfer catalyzed reaction of chloroform with a series of alpha-(aminomethyl)azanaphthalenes was found to be general and yield the corresponding annulated imidazo derivaties in comparable yields. Despite product yields in the 25% range, GC of the reaction mixtures indicates that the volatile fractions generally consist of residual starting aminomethyl compound, the imidazo product, and a minor amount of the (alpha-azanaphthylmethyl)formamide. However, 3-(aminomethyl)isoquinoline (18) failed to provide any of the expected imidazo[1,5-b]isoquinoline (19). The failure to detect 19 was investigated.