Process for the production of carboxylic acid chlorides of aroma

Details Process for the production of carboxylic acid chlorides of aroma Process for the production of carboxylic acid chlorides of aroma

1993-03-17

1994-11-15

Rotman, Alan L.

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

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

546298, 546314, 546315, C07D24124, C07D21354, C07D21355, C07D21361

Patent

active

053649397

ABSTRACT:
The process for the production of the carboxylic acid chlorides of the aromatic nitrogen heterocycles of the series of the compounds of the general formulas: ##STR1## The hydroxy carboxylic acids of the aromatic nitrogen heterocycles from the series of the compounds of the general formulas: ##STR2## In the general formulas I to VI, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are the same or different and each is a hydrogen atom or a halogen atom. The chlorination is performed with a solution of phosphorous pentachloride in phosphoroxy chloride. The excess phosphorous pentachloride is converted into phosphoroxy chloride either with a C.sub.1 -C.sub.4 -carboxylic acid or with a silane of the general formula:

REFERENCES:
patent: 4081451 (1978-03-01), Mayer
patent: 4144238 (1979-03-01), Said
Fischer et al., BPR, D., Chem. ges., 45, (1912), pp. 2456-2467.
Ber. D. Chem. ges., 45, (1912), p. 2461.

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