MANUFACTURE OF alpha-GLYCO COMPOUNDS

摘要

1,253,620. α-Glyco compounds. COMPAGNIE FRANCAISE DE RAFFINAGE. 14 Oct., 1969 [14 Oct., 1968], No. 50528/69. Heading C2C. An α-glyco compound (defined) is prepared by reacting an olefinic compound (defined) with an organic hydroperoxide in the presence of water and a catalyst which is one of the following metals or a compound thereof: Ti, V, Cr, Se, Zn, Nb, Ta, Te, U, Mo, W and Re. The hydroperoxide of the general formula ROOH is preferably one in which R has from 4 to 10 carbon atoms and may be an alkyl, alkenyl, aryl, alkaryl, aralkyl, cycloalkyl or cycloalkenyl radical. The olefinic compound may be an olefinic hydrocarbon, e.g. butene-2, cyclohexene or isoamylene, an olefinic alcohol, e.g. allyl alcohol, or an olefinic acid or ester, e.g. oleic acid. The reaction is preferably carried out at between 50‹ and 200‹ C., the amount of hydroperoxide being present in an amount less than 30% by weight based on the total weight of olefinic compound and hydroperoxide. The catalyst is preferably vanadium or molybdenum, e.g. in the form of a carboxylate, the amount of metal in the elemental form on a mol. basis being greater than 10-4 per mol. of hydroperoxide. Examples describe the preparation of various glycols including glycerol and 2-methylbutane-2,3-diol.