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US 2007/0167517 A1Published application
Stabilized derivatives of ascorbic aicd
AssigneeTagra Biotechnologies Ltd.
InventorsEmma Kvitnitsky, Valery Belakhov, Vladimir Babtsov, Vury Shapiro
Life of this patent
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Abstract
Ascorbic acid derivatives of the general formula 1: wherein R<1> is a C2-C22 acyl group, an amino acid group, or a C1-C17 alkyl group; R<2> is ammonium or a metal cation; and each of R<3> or R<4>, independently, is hydrogen, a C2-C22 acyl group, an amino acid residue, or a C1-C17 alkyl group, are more stable than ascorbic acid and can be used as a source of vitamin C in pharmaceutical, nutraceutical and cosmetic compositions.
Claims31
A compound of the general formula I:
- wherein R1 is a C2-C22 acyl group, an amino acid group, or a C1-C17 alkyl group;
- R2 is ammonium or a metal cation;
- and each of R3 or R4, independently, is hydrogen, a C2-C22 acyl group, an amino acid residue, or a C1-C17 alkyl group.
Dependencies are inferred from the claim text.