| 摘要 |
<p>2-Keto L-gulonic acids are made by (a) dissolving 0.05 mol of a cpd. of formula (I), in which R is methyl, furyl, etc., 0.2 mol. of CaI2 and 0.1 mol of Ca(OH)2 in 100 ml. water in a non-compartmented cell; (b) subjecting the soln. to electrolysis at 25 deg.C with magnetic stirring, using a Pt anode and stainless steel cathode, with current density of 10A for 1 hr.; (c) acidifying to an acid pH; (d) filtering to remove iodine and surplus water; (e) extracting the residue with chloroform; and (f) hydrolysing the residue with 0.1 N HCl.</p> |
