IP Library › Granted Patent US 7,629,476
Granted Patent B2
US 7,629,476 · App. 12/388,274 · Granted Dec 8, 2009

Method for producing 2,5-dimethylphenyl acetic acid

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,629,476
App. No.
12/388,274
Granted
Dec 8, 2009
Kind
B2
Abstract

The invention relates to a method for preparing 2,5-dimethylphenylacetic acid by converting p-xylene with chloroacetyl chloride into 2-chloro-1-(2,5-dimethylphenyl)ethanone, which is reacted with the compound of the formula (II) to give the compound of the formula (III), which is then rearranged to give a mixture of the compounds (IV) and (V), which is then hydrolyzed to 2,5-dimethylphenylacetic acid.

Claims (3)

1. A compound of the formula (III)

in which

X X is a direct single bond, CH 2 CHCH 3 , C(CH 3 ) 2 or C(C 2 H 5 ) 2 .

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 20, 2015
From: BAYER CROPSCIENCE AG
To: BAYER INTELLECTUAL PROPERTY GMBH
Reel/Frame 034990/0879 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 5, 2009
From: HIMMLER, THOMAS
To: BAYER CROPSCIENCE AG
Reel/Frame 023323/0344 →