[EN] PROCESS FOR PREPARING 3-FLUOROALKYL-5-PYRAZOLECARBOXYLATES AND 3-FLUOROALKYL-5-PYRAZOLECARBOXYLIC ACIDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 3-FLUOROALKYL-5-PYRAZOLECARBOXYLATES ET D'ACIDES 3-FLUOROALKYL-5-PYRAZOLECARBOXYLIQUE
申请人:BAYER CROPSCIENCE AG
公开号:WO2018054807A1
公开(公告)日:2018-03-29
The present invention relates to a novel process for preparing 3-fluoroalkyl-5-pyrazolecarboxylates from ketimines and oxalic acid derivatives which can be further transformed into 3-fluoroalkyl-5- pyrazolecarboxylic acids.
Synthesis of Celecoxib, Mavacoxib, SC-560, Fluxapyroxad, and Bixafen Enabled by Continuous Flow Reaction Modules
作者:Joshua Britton、Timothy F. Jamison
DOI:10.1002/ejoc.201700992
日期:2017.12.1
Multi-step continuousflowsynthesisenables a parallel approach to obtain agrochemicals and pharmaceuticals containing 3-fluoroalkyl pyrazole cores. In this system, fluorinated amines are transformed into pyrazole cores through a telescoped in situ generation and consumption of diazoalkanes. Once synthesized, additional continuousflow and batch reactions add complexity to the pyrazole core via C–N
Process for preparing 3-fluoroalkyl-5-pyrazolecarboxylates and 3-fluoroalkyl-5-pyrazolecarboxylic acids
申请人:BAYER CROPSCIENCE AKTIENGESELLSCHAFT
公开号:US10556867B2
公开(公告)日:2020-02-11
The present invention relates to a novel process for preparing 3-fluoroalkyl-5-pyrazolecarboxylates from ketimines and oxalic acid derivatives which can be further transformed into 3-fluoroalkyl-5-pyrazolecarboxylic acids.