Convenient synthesis of 4-amino-3,5-disubstituted pyrazoles in one step from the corresponding diketo oximes
摘要:
A convenient one-step protocol for the synthesis of 4-amino-3.5-disubstituted pyrazoles has been developed. This method employs readily available diketo oximes as starting materials. and employs hydrazine hydrate for the cyclization and subsequent reduction of the intermediate nitroso compound. (C) 2004 Elsevier Ltd. All rights reserved.
HANSEN, J. E.;FLIPPEN-ANDERSON, J. L., J. ORG. CHEM., 1985, 50, N 20, 3955-3956
作者:HANSEN, J. E.、FLIPPEN-ANDERSON, J. L.
DOI:——
日期:——
Convenient synthesis of 4-amino-3,5-disubstituted pyrazoles in one step from the corresponding diketo oximes
作者:Tahir Majid、Corey R. Hopkins、Brian Pedgrift、Nicola Collar
DOI:10.1016/j.tetlet.2004.01.045
日期:2004.3
A convenient one-step protocol for the synthesis of 4-amino-3.5-disubstituted pyrazoles has been developed. This method employs readily available diketo oximes as starting materials. and employs hydrazine hydrate for the cyclization and subsequent reduction of the intermediate nitroso compound. (C) 2004 Elsevier Ltd. All rights reserved.
Stereochemical assignments for 1-phenyl-1,2,3-butanetrione 2-oxime and related compounds