[EN] PROCESS FOR PREPARING 3,5-BIS(FLUOROALKYL)PYRAZOLE DERIVATIVES FROM α,α-DIHALOAMINES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS DE 3,5-BIS(FLUOROALKYL)PYRAZOLE À PARTIR DE &Agr;,&Agr;-DIHALOAMINES
申请人:BAYER CROPSCIENCE AG
公开号:WO2014187773A1
公开(公告)日:2014-11-27
The present invention relates to a novel process for preparing 3,5-bis(fluoroalkyl)pyrazole derivatives from α,α-dihaloamines.
An expeditious and solvent free synthesis of azine derivatives using sulfated anatase–titania as a novel solid acid catalyst
作者:B. Krishnakumar、M. Swaminathan
DOI:10.1016/j.catcom.2011.08.029
日期:2011.11
Solid acid catalyst sulfated anatase-titania (TiO2-SO42-) has been used for the synthesis of azine derivatives from benzophenone hydrazone and ketones/aldehydes by simple physical grinding. This sulfated titania gives an excellent yield with short reaction time and is an inexpensive, easily recyclable catalyst for this reaction. (C) 2011 Elsevier B.V. All rights reserved.