Preparation of 2-aryloxy-2-haloproptonic acid compounds

Details Preparation of 2-aryloxy-2-haloproptonic acid compounds Preparation of 2-aryloxy-2-haloproptonic acid compounds

1981-06-17

1982-09-07

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

560 21, 560 23, 562434, 562466, 562472, 564170, 564171, 260465D, C07C 6976

Patent

active

043485340

ABSTRACT:
2-Aryloxy-2-halopropionic acid compounds are prepared by reacting 2-aryloxypropionic acid compounds with N-halocarboxylic acid imides in the presence of aliphatic halohydrocarbons as solvents, and of from 0.0001 to 0.001 mole of halogen per mole of N-halocarboxylic acid imide, from 0.005 to 0.05 per cent by weight of water, based on N-halocarboxylic acid imide, and from 0.0005 to 0.005 mole of azo-bis-isobutyronitrile and/or dibenzoyl peroxide, per mole of N-halocarboxylic acid imide.
The end products obtainable by the process of the invention are valuable starting materials for the preparation of drugs, crop protection agents and dyes.

REFERENCES:
patent: 3546273 (1970-12-01), Bolhofer
patent: 4153803 (1979-05-01), Thiele et al.

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