94058-90-9Relevant articles and documents
A New Method for the Preparation of 2-(Alkylamino)benzoxazoles and 2-(Alkylimino)benzoxazolines
Yamato, Masatoshi,Takeuchi, Yasuo,Hattori, Kyoko,Hashigaki, Kuniko
, p. 3053 - 3060 (2007/10/02)
New syntheses of 2-(alkylamino)benzoxazoles (III) and 3-alkyl-2-(alkylimino)benzoxazolines (IV) were developed.Various compounds III were obtained by the reaction of 2-(methylthio)benzoxazole with amines.In the alkylation of 2-(monoalkylamino)benzoxazoles, the use of a base as a catalyst was found to be important for the selective preparation of 2-(N,N-dialkylamino)benzoxazoles; in the absence of base, IV was obtained.On the other hand, alkylation of N,N'-dialkyl-N-(2-hydroxyphenyl)thioureas resulted in the development of another method for the preparation of IV.Keywords - 2-(alkylamino)benzoxazole; 3-alkyl-2-(alkylimino)benzoxazoline; 2-(methylthio)benzoxazole; N,N'-dialkyl-N-(2-hydroxyphenyl)thiourea; 3-alkylbenzoxazoline-2-thione