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Title:
PRODUCTION OF 3,3-DICHLORO-1,1,1,2,2-PENTAFLUOROPROPANE
Document Type and Number:
Japanese Patent JPH03127747
Kind Code:
A
Abstract:

PURPOSE: To obtain the title compound in high yield by chlorinating hydroxyl group of 2,2,3,3,3-pentafluoro-1-propanol to give 3-chloro-1,1,1,2,2- pentafluoropropane and further chlorinating 3-chloro-1,1,1,2,2-pentafluoropropane.

CONSTITUTION: Hydroxyl group of 2,2,3,3,3-pentafluoro-1-propanol, for example, is reacted with any of various kinds of sulfonic acid halide under an alkali condition to give a sulfonic ester, which is heated with an alkali metal chloride in an inert solvent or in a solventless state and chlorinated at two stages or is reacted with SOCl2 in the presence of pyridine and directly chlorinated to give 3-chloro-1,1,1,2,2-pentafluoropropane. Then this compound is chlorinated or in a gaseous phase or liquid phase and further chlorinated to give 3,3- dichloro-1,1,1,2,2-pentafluoropropane in high yield.


Inventors:
MORIKAWA SHINSUKE
SAMEJIMA SHUNICHI
ONISHI KEIICHI
OKAMOTO SHUICHI
OMORI TAKASHI
TANUMA TOSHIHIRO
Application Number:
JP1989000263099
Publication Date:
May 30, 1991
Filing Date:
October 11, 1989
Export Citation:
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Assignee:
ASAHI GLASS CO LTD
International Classes:
C07C17/10; C07C17/16; C07C19/10; (IPC1-7): C07C17/10; C07C17/16; C07C19/08