Process for dechlorinating 4,5-dichlorofluorodioxolanes to obtain
申请人:E. I. Du Pont De Nemours and Company
公开号:US04908461A1
公开(公告)日:1990-03-13
Process for preparing dioxoles by dechlorinating 4,5-dichlorodioxolanes with selected molar quantities of a lithium aluminum hydride/titanium (III or IV) chloride reagent at 20.degree.-35.degree. C.
A process for the dehalogenation of 1,3-dioxolanes of formula: ##STR1## wherein X.sub.1 and X.sub.3, like or different from each other, are Cl or Br, X.sub.2 and X.sub.4, like or different from each other, are F or H. Said process consists in contacting the dioxolane of formula (I) with metallic zinc at a temperature ranging from +30.degree. to 130.degree. C. The corresponding dioxoles are obtained.