Nitrogen's reactivity of various 3-alkoxypyrazoles
摘要:
Our current interest in the design of original chemical libraries featuring a pyrazole nucleus led us to focus on the chemistry of the 3-alkoxy-5-methylpyrazoles we have recently made readily available. With in mind the preparation of an array of the less accessible 1-arylpyrazol-3-ones, the present report describes the respective nitrogen's reactivity of various 3-alkoxypyrazoles toward arylation reaction, using arylboronic acids, as well as alkylation reactions using methyl iodide or benzylbromide. The structure assignments of the isomers obtained were achieved using long distance N-15-H-1 NMR correlation measurements or by the recourse to unambiguous synthetic pathways. (c) 2009 Elsevier Ltd. All rights reserved.
Alkoxypyrazoles and the process for their preparation
申请人:Institut Pasteur
公开号:EP2151433A1
公开(公告)日:2010-02-10
The present invention relates to a alkoxypyrazoles preparation process, and new alkoxypyrazole compounds.
本发明涉及一种烷氧基吡唑的制备方法,以及新的烷氧基吡唑化合物。
[EN] NEW ALKOXYPYRAZOLES<br/>[FR] NOUVEAUX ALCOXYPYRAZOLES
申请人:PASTEUR INSTITUT
公开号:WO2010015657A2
公开(公告)日:2010-02-11
The present invention relates to a alkoxypyrazoles preparation process, and new alkoxypyrazoles compounds.
Nitrogen's reactivity of various 3-alkoxypyrazoles
作者:Sandrine Guillou、Frédéric J. Bonhomme、Yves L. Janin
DOI:10.1016/j.tet.2009.01.099
日期:2009.3
Our current interest in the design of original chemical libraries featuring a pyrazole nucleus led us to focus on the chemistry of the 3-alkoxy-5-methylpyrazoles we have recently made readily available. With in mind the preparation of an array of the less accessible 1-arylpyrazol-3-ones, the present report describes the respective nitrogen's reactivity of various 3-alkoxypyrazoles toward arylation reaction, using arylboronic acids, as well as alkylation reactions using methyl iodide or benzylbromide. The structure assignments of the isomers obtained were achieved using long distance N-15-H-1 NMR correlation measurements or by the recourse to unambiguous synthetic pathways. (c) 2009 Elsevier Ltd. All rights reserved.