Process for preparing fluorinated 1,3-dioxolan 2-one
AssigneeDaikin Industries, Ltd.
InventorsMeiten Koh, Akiyoshi Yamauchi, Masahiro Tomita, Akinori Tani
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Abstract
The present invention provides a process for preparing fluorinated 1,3-dioxolan-2-one by reacting a derivative of 1,3-dioxolan-2-one having halogen atom other than fluorine with an amine hydrofluoride in an organic solvent, and in this preparation process, fluorinated 1,3-dioxolane-2-on can be prepared in a short period of time by liquid-liquid reaction while maintaining high yield, by using a derivative of 1,3-dioxolan-2-one having halogen atom other than fluorine as a starting material and fluorinating the derivative with a fluorinating agent.
Claims4
A process for preparing fluorinated 1,3-dioxolan-2-one, comprising a fluorination step (A) by reacting a derivative of 1,3-dioxolan-2-one represented by the formula (1):
- wherein X1, X2, X3 and X4 are the same or different, and each is H, CH3, Cl, Br, I or CR3 (at least one of R is Cl, Br or I, and the other R is H);
- at least one of X1, X2, X3 and X4 is Cl, Br, I or CR3,
- with an amine hydrofluoride in an ester solvent,
- wherein a mole ratio “n” of hydrofluoric acid to amine in said amine hydrofluoride is from 1.0 to 2.0;
- and
- a step (C) of treating with an antacid, wherein the antacid is a porous substance of a silicon oxide, an aluminum oxide, a silicon/aluminum compound oxide, or two or more thereof.
Dependencies are inferred from the claim text.