Process for the preparation of 1,1,2,2-tetrahydroperfluoroalkano

Details Process for the preparation of 1,1,2,2-tetrahydroperfluoroalkano Process for the preparation of 1,1,2,2-tetrahydroperfluoroalkano

1987-12-04

1988-12-13

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560236, 2604109R, C07C 6702

Patent

active

047912235

ABSTRACT:
The invention relates to the synthesis of 1,1,2,2-tetrahydroperfluoroalkanols and their esters by oxidizing a 2-(perfluoroalkyl)ethyl iodide using hydrogen peroxide in a carboxylic acid or carboxylic acid ester in the presence of sulphuric acid.
In the process according to the invention, from 1 to 30 moles of sulphuric acid, from 1 to 50 moles of carboxylic acid or of an ester of such an acid, and from 3 to 20 moles of hydrogen peroxide per mole of 2-perfluoralkyl)ethyl iodide are used.

REFERENCES:
patent: 3239557 (1966-08-01), Fasick
patent: 3979469 (1976-09-01), Jager
Matsuo, M. et al, Asahi Garasu Kenkyu Hokoku 26(1) 55-61, 1976.
Dieng, S. Y. et al., J. Fluorine Chem. 28(3) 341-55, 1985.

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