Substituted 1-(4-aminophenyl)pyrazoles and their use as anti-inflammatory agents
申请人:Boehringer Ingelheim Pharmaceuticals, Inc.
公开号:US06506747B1
公开(公告)日:2003-01-14
1-(4-aminophenyl)pyrazoles optionally substituted on the 3- and 5-positions of the pyrazole ring and on the amino group at the 4-position of the phenyl ring are disclosed and described, which pyrazoles inhibit IL-2 production in T-lymphocytes.
Regioselective Synthesis of Unsymmetrical 3,5-Dialkyl-1-arylpyrazoles
作者:Xiao-jun Wang、Jonathan Tan、Li Zhang
DOI:10.1021/ol0001822
日期:2000.10.1
3-Alkoxylmethyl-5-alkylpyrazoles undergo regioselective N-arylation with 4-fluoronitrobenzene in the presence of base to yield the corresponding 1-(4-nitro-phenyl)pyrazoles. Further elaboration of these intermediates furnishes a practical synthesis of unsymmetrical 3,5-dialkyl-1-arypyrazoles. A tentative explanation of the observed regioselectivities is provided.