Electrochemical generation of 4-amino-2-aryl-2-oxazolines
摘要:
A convenient method for the synthesis of the title compounds has been established. Chloralbenzamides were efficiently converted to N-(1-amino-2,2-dichloroethyl)benzamides which were directly transformed to 4-amino-2-aryl-2-oxazolines in fair to good yields by electrochemical reduction in an aprotic medium under constant cathodic potential. The molecular structure of the electrolysis products has been corroborated by X-ray crystallographic analysis of 4-(1-benzyl-3-phenylureido)-2-phenyl-2-oxazoline. (C) 2002 Elsevier Science Ltd. All rights reserved.
Electrochemical generation of 4-amino-2-aryl-2-oxazolines
作者:Antonio Guirado、Raquel Andreu、Jesús Gálvez、Peter G Jones
DOI:10.1016/s0040-4020(02)01288-7
日期:2002.12
A convenient method for the synthesis of the title compounds has been established. Chloralbenzamides were efficiently converted to N-(1-amino-2,2-dichloroethyl)benzamides which were directly transformed to 4-amino-2-aryl-2-oxazolines in fair to good yields by electrochemical reduction in an aprotic medium under constant cathodic potential. The molecular structure of the electrolysis products has been corroborated by X-ray crystallographic analysis of 4-(1-benzyl-3-phenylureido)-2-phenyl-2-oxazoline. (C) 2002 Elsevier Science Ltd. All rights reserved.
The reaction of 4-amino-2-oxazolines with isocyanates and isothiocyanates. Synthesis and X-ray structures of polysubstituted 2-imidazolidinones, 1,3-oxazolidines and 1,3-thiazolidines
作者:Antonio Guirado、Raquel Andreu、Bruno Martiz、Delia Bautista、Carmen Ramírez de Arellano、Peter G. Jones
DOI:10.1016/j.tet.2006.04.058
日期:2006.6
However, the reactions with non-sulfonylated isocyanates or isothiocyanates were slower, leading to the expected ureido and thioureido derivatives 5, which were easily and efficiently transformed to either polysubstituted 2-imino-1,3-oxazolidine or 2-imino-1,3-thiazolidine hydrochlorides 7, respectively, by treatment with hydrochloric acid. The possible reasons for this disparity in chemical behaviour are