Regioselective Synthesis of 3-O-Alkyl Ethers of Ascorbic Acid without Protecting Groups in a Single Step
作者:Uwe Beifuss、Olaf Kunz、Gundula Voss
DOI:10.1016/s0040-4020(99)01013-3
日期:2000.1
The direct alkylation of L-ascorbic acid (vitamin C) with alkyl mesylates using sodium hydrogen carbonate as a base without protecting groups proceeds regioselectively and yields the corresponding 3-O-alkyl ethers of L-ascorbic acid exclusively. (C) 2000 Elsevier Science Ltd. All rights reserved.
METHOD AND COMPOSITION FOR THERMALLY STABILIZING VITAMIN C WITHIN NANO LAYERS OF MONTMORILLONITE CLAY
申请人:Goonesekara Chandhi S.
公开号:US20110184006A1
公开(公告)日:2011-07-28
A thermally stable Vitamin C composition containing montmorillonite, an organic acid containing L-ascorbic acid or a derivative thereof, a divalent cation present within nanolayers of the montmorillonite, wherein the organic acid is combined with the divalent cation within the nanolayers to form an organic acid-montmorillonite chelate.
NIHRO, YASUNORI;MIYATAKA, HIDEKI;SUDO, TADAMITSU;MATSUMOTO, HITOSHI;SATOH+, J. MED. CHEM., 34,(1991) N, C. 2152-2157