Invention Grant
- Patent Title: Process for the preparation of 3-haloalkylpyrazoles
- Patent Title (中): 3-卤代烷基吡唑的制备方法
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Application No.: US13816161Application Date: 2011-08-03
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Publication No.: US09359304B2Publication Date: 2016-06-07
- Inventor: Linhua Wang , Ritesh Bharat Sheth
- Applicant: Linhua Wang , Ritesh Bharat Sheth
- Applicant Address: CH Basel
- Assignee: Syngenta Participations AG
- Current Assignee: Syngenta Participations AG
- Current Assignee Address: CH Basel
- Agent Brian D. McAlhaney
- International Application: PCT/EP2011/063360 WO 20110803
- International Announcement: WO2012/019950 WO 20120216
- Main IPC: C07D231/14
- IPC: C07D231/14 ; C07D409/12

Abstract:
The present invention provides a process for the preparation of a compound of formula (I) wherein R1 is C1-C4 haloalkyl; R2 is optionally substituted alkyl, optionally substituted aryl or optionally substituted heteroaryl; and R3 is methyl or ethyl; comprising reacting a compound of formula (IV) wherein R1, R2 and R3 are as defined for the compound of formula I; with an alkylating agent in the presence of an amide.
Public/Granted literature
- US20130274481A1 PROCESS FOR THE PREPARATION OF 3-HALOALKYLPYRAZOLES Public/Granted day:2013-10-17
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