IP Library › Granted Patent US 8,987,460
Granted Patent B2
US 8,987,460 · App. 13/739,446 · Granted Mar 24, 2015

Process for preparing pyridyl-substituted pyrazoles

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Quick Facts
Patent No.
US 8,987,460
App. No.
13/739,446
Granted
Mar 24, 2015
Kind
B2
Abstract

The present invention relates to a process for preparing 1-pyridyl-substituted pyrazoles, comprising the reaction of acetyleneketones with pyridylhydrazine derivatives to give 1-pyridyl-substituted dihydro-1H-pyrazoles, the further reaction thereof with elimination of water to give 1-pyridyl-substituted trihalomethylpyrazoles, and the further processing thereof.

Claims (6)

1. A compound of the formula (V)

characterized in that,

X is halogen,

R 3 is chlorine, and

R 4 is benzyl.

2. The compound of the formula (V) according to claim 1 , characterized in that X is chlorine.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 23, 2015
From: BAYER CROPSCIENCE AG
To: BAYER INTELLECTUAL PROPERTY GMBH
Reel/Frame 035009/0538 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 27, 2015
From: PAZENOK, SERGII; LUI, NORBERT; BLASCHKE, HARRY
To: BAYER CROPSCIENCE AG
Reel/Frame 034819/0319 →