Method for producing o-chloromethyl benzoic acid chlorides

Details Method for producing o-chloromethyl benzoic acid chlorides Method for producing o-chloromethyl benzoic acid chlorides

2006-04-25

2006-04-25

Richter, Johann (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

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

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