METHOD OF PREPARING 2,5-DIALKOXY-2,5-DIHYDROFURANS Russian patent published in 1999 - IPC

FIELD: organic chemistry. SUBSTANCE: heterocyclic compounds such as 2,5-dialkoxydihydrofuran, namely 2,5- dialkoxy-2,5-dihydrofurans of formula I: R¹ wherein R is alkyl and is hydrogen or methyl, are semiproducts in syntheses of chemical reagents and biologically active compounds. The claimed method comprises reacting furan compound and oxidizing agent in the presence of alcohol and vanadium compound. Furan compound is furan or 2- methyl-furan, and oxidizing agent is hydrogen peroxide and vanadium compound at molar ratio of furan or methylfuran, alcohol, hydrogen peroxide and vanadium compound of 1:(1-30):(0.5-5):(0.01-0.1) at 70 C. Individual nature and structure of the resulting compounds are supported by physico-chemical method of analysis. The claimed method makes it possible to simplify process and to make it more efficient. EFFECT: more efficient preparation method. 2 cl, 5 ex, 2 tbl