Metathesis reactions are finding greater use since the development of chiral catalysts that can metathesise functionalised olefins. Both ring-opening and ring-closing asymmetric reactions are known in which chiral catalysts are used. One drawback is
Patent No. U.S. 6,942,803 Title or Subject: Process for Purifying a Organic Acid The patent is aimed at the purification of lactic acid (LA) produced by fermentation. LA is used to produce polylactic acid (PLA) that is a biodegradable plastic with a
Patent No. U.S. 6, 946,555 Assignee: Pfizer Inc., New York, New York, U.S.A. Title or Subject: Preparation of Triazoles by Organometallic Addition to Ketones The two claims of this patent cover the compounds 18 and 26 that are both novel, and hence
Patent No. U.S. 6,946,563 Assignee: E.I. Du Pont De Nemours and Company, Wilmington, Delaware, U.S.A. Title or Subject: Production of 5-Methyldihydrofuran-2-one from Levulinic Acid in Supercritical Media Levulinic acid 27 is easily obtained from var
