Synthesis of N,N-dialkylaminobenzonitriles and halo-(N,N-dialkyl)benzamidines by reaction of halobenzonitriles with lithium amides
摘要:
3- and 4-N,N-Dialkylaminobenzonitriles and 4-chloro-(N,N-dialkyl)benzamidines were isolated by reacting 4-chlorobenzonitrile with hindered lithium amides under thermodynamic (0 degrees C) and kinetic control conditions (-78 degrees C), respectively. As previously reported, a benzyne mechanism seems to be confirmed since N,N-dialkylaminobenzonitriles are formed. Only benzamidines were isolated in fair to high yields at both 0 degrees C and -78 degrees C with non-hindered lithium amides. Exploitation and mechanistic rationale of the reaction of different halobenzonitriles are also reported. (C) 2011 Elsevier Ltd. All rights reserved.
The Reaction of Halogenomagnesium Dialkylamides with Nitriles. The Preparation of N,N-Disubstituted Amidines
作者:Emil Lorz、Richard Baltzly
DOI:10.1021/ja01185a073
日期:1948.5
Synthesis of N,N-dialkylaminobenzonitriles and halo-(N,N-dialkyl)benzamidines by reaction of halobenzonitriles with lithium amides
作者:Paola Vitale、Leonardo Di Nunno、Antonio Scilimati
DOI:10.1016/j.tet.2011.06.066
日期:2011.9
3- and 4-N,N-Dialkylaminobenzonitriles and 4-chloro-(N,N-dialkyl)benzamidines were isolated by reacting 4-chlorobenzonitrile with hindered lithium amides under thermodynamic (0 degrees C) and kinetic control conditions (-78 degrees C), respectively. As previously reported, a benzyne mechanism seems to be confirmed since N,N-dialkylaminobenzonitriles are formed. Only benzamidines were isolated in fair to high yields at both 0 degrees C and -78 degrees C with non-hindered lithium amides. Exploitation and mechanistic rationale of the reaction of different halobenzonitriles are also reported. (C) 2011 Elsevier Ltd. All rights reserved.