Process for the preparation of arylamides of heteroaromatic carb

Details Process for the preparation of arylamides of heteroaromatic carb Process for the preparation of arylamides of heteroaromatic carb

1997-05-02

1999-04-06

Fan, Jane

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544335, 544407, 546323, 5462761, C07D25130

Patent

active

058920323

ABSTRACT:
A process for the preparation of arylamides of heteroaromatic carboxylic acids of the formula: ##STR1## in which each A.sup.n is nitrogen or CR.sup.n (n=1 to 5), with the proviso that at least one of the ring members is nitrogen and that two nitrogen atoms are not bonded directly to one another; R.sup.1 to R.sup.5, if present, independently of one another are hydrogen, C.sub.1-4 -alkyl or aryl, one of the substituents R.sup.1 to R.sup.5 being a group of the formula --OR, in which R is an optionally substituted aromatic or heteroaromatic radical; R.sup.6 is hydrogen or C.sub.1-4 -alkyl; and R.sup.7 is an optionally substituted aromatic or heteroaromatic radical. The amides are obtained from the corresponding heteroaromatic halogen compounds, the corresponding aromatic amines and carbon monoxide in the presence of a palladium phosphine complex. Compounds of this class are important herbicides.

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