New Practical Synthesis of Indazoles via Condensation of o-Fluorobenzaldehydes and Their O-Methyloximes with Hydrazine
摘要:
The reaction of o-fluorobenzaldehydes and their O-methyloximes with hydrazine has been developed as a new practical synthesis of indazoles. Utilization of the methyloxime derivatives of benzaldehydes (in the form of the major E-isomers) in this condensation effectively eliminated a competitive Wolf-Kishner reduction to fluorotoluenes, which was observed in the direct preparations of indazoles from aldehydes. Reaction of Z-isomers of methyloximes with hydrazine resulted in the formation of 3-aminoindazoles via a benzonitrile intermediate.
PROCESS FOR THE PREPARATION OF INDAZOLYL UREAS THAT INHIBIT VANILLOID SUBTYPE 1 (VR1) RECEPTORS
申请人:Lukin Kirill A.
公开号:US20110040102A1
公开(公告)日:2011-02-17
The present invention relates to a process of preparing indazolyl ureas that are useful as antagonists of the vanilloid receptor subtype 1 (VR1).
本发明涉及一种制备吲唑基脲的方法,其可用作vanilloid受体亚型1(VR1)的拮抗剂。
US7847104B2
申请人:——
公开号:US7847104B2
公开(公告)日:2010-12-07
US8519186B2
申请人:——
公开号:US8519186B2
公开(公告)日:2013-08-27
[EN] PROCESS FOR THE PREPARATION OF INDAZOLYL UREAS THAT INHIBIT VANILLOID SUBTYPE 1 (VR1) RECEPTORS<br/>[FR] PROCEDE DE PREPARATION D'INDAZOLYL UREES QUI INHIBENT LES RECEPTEURS VANILLOIDES DE SOUS-TYPE 1 (VR1)
申请人:ABBOTT LAB
公开号:WO2007121339A2
公开(公告)日:2007-10-25
[EN] The present invention relates to a process of preparing indazolyl ureas that are useful as antagonists of the vanilloid receptor subtype 1 (VR1). [FR] La présente invention concerne un procédé de préparation d'indazolyl urées utilisables en tant qu'antagonistes du récepteur vanilloïde de sous-type 1 (VR1).