Method for producing o-chloromethyl benzoic acid chlorides

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic halides

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C562S861000

Reexamination Certificate

active

07034181

ABSTRACT:
The invention relates to a method for producing o-chloromethyl benzoic acid chlorides of formula (I), in which R1to R4can be the same or different and represent hydrogen C1–C4alkyl, halogen or trifluoromethyl, by reaction benzo condensed lactones of formula (II), in which R1to R4have the above-mentioned meaning, with thionyl chloride. The inventive method is characterized in that the reaction is carried out in the presence of catalytic quantities of a Lewis acid and in the presence of catalytic quantities of a phosphine derivative.

REFERENCES:
patent: 5130478 (1992-07-01), Gauthier et al.
patent: 6222060 (2001-04-01), Kim et al.
patent: 6727385 (2004-04-01), Gotz et al.
patent: 0 460 575 (1991-12-01), None
patent: 0 463 488 (1992-01-01), None
patent: 0 676 389 (1995-10-01), None
patent: 676 389 (1995-10-01), None
patent: WO 95/18789 (1995-07-01), None
patent: WO 95/21154 (1995-08-01), None
patent: 97/12854 (1997-04-01), None
patent: WO 97/12854 (1997-04-01), None
patent: WO 97/15552 (1997-05-01), None
patent: 99/16743 (1999-04-01), None
patent: WO 99/16743 (1999-04-01), None
patent: 200142183 (2001-06-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for producing o-chloromethyl benzoic acid chlorides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for producing o-chloromethyl benzoic acid chlorides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing o-chloromethyl benzoic acid chlorides will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3617409

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.