Process for producing ascorbic acid 6-esters

Details Process for producing ascorbic acid 6-esters Process for producing ascorbic acid 6-esters

1989-03-10

1991-03-05

Waddell, Frederick E.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549317, C07D30762

Patent

active

049979582

ABSTRACT:
A process for the manufacture of 6-aliphatic C.sub.2-20 -carboxylic acid esters of ascorbic acid by esterifying the ascorbic acid with an aliphatic C.sub.2-20 -carboxylic acid halide in the presence of a N,N-dialkyl-alkanecarboxylic acid amide, of a cyclic amide of the 1-methyl-2-pyrrolidone type, of a tetraalkylcarbamide such as tetramethylurea, of a cyclic carbamide of the 1,3-dimethyl-2-imidazolidinone type or of a phosphoric acid triamide of the hexamethylphosphoric acid triamide type. The 6-ascorbyl linolate which can be manufactured in this manner is novel and is likewise an object of the present invention. The thus-manufacturable 6-aliphatic C.sub.2-20 -carboxylic acid esters of ascorbic acid are important alternative application forms of L-ascorbic acid (vitamin C).

REFERENCES:
patent: 2454748 (1948-11-01), Weisblat et al.
patent: 3250790 (1966-05-01), Klaui
Kanebo, Derwent 87-14094/20 (1987).
Taisho, Derwent 9530 (1963).

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