Preparation of a mixture of an alkyl 3-chloroanthranilate and an

Details Preparation of a mixture of an alkyl 3-chloroanthranilate and an Preparation of a mixture of an alkyl 3-chloroanthranilate and an

1980-05-27

1981-12-15

Breitenstein, G. T.

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

Organic compounds

Carboxylic acid esters

544 94, C07C10154

Patent

active

043060749

ABSTRACT:
A mixture of an alkyl 3-chloroanthranilate and an alkyl 6-chloroanthranilate, with a particular molar ratio of the components, is prepared by (a) reacting 3-chlorophthalic anhydride with ammonia, an alkali metal hydroxide and an alkali metal hypochlorite or (b) converting 3-chlorophthalic anhydride to 3-chlorophthalimide followed by reaction of the latter with an alkali metal hydroxide and an alkali metal hypochlorite, and, finally, esterifying the mixture of 5-chloroisatoic anhydride and 8-chloroisatoic anhydride, obtained by method (a) or method (b), with an alkanol.
The compounds obtainable by the process of the invention are valuable starting materials for the preparation of dyes, crop protection agents and scents.

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