Process for the preparation of fluoroformates

Details Process for the preparation of fluoroformates Process for the preparation of fluoroformates

1984-09-17

1986-09-16

Daus, Donald G.

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

Organic compounds

Halocarbonate esters

558280, C07C 6806

Patent

active

046121439

ABSTRACT:
A process for the preparation of fluoroformates of formula: ##STR1## in which R.sup.1 is a substituted or unsubstituted, saturated or unsaturated aliphatic, cycloaliphatic or polycyclic radical, or substituted or unsubstituted araliphatic radical or an aromatic radical, which consists of reacting a carbonate of formula: ##STR2## in which R.sup.1 has the same meaning as hereinabove and R.sup.2 is hydrogen, alkyl of 1-12 carbon atoms, cycloalkyl of 5-12 carbon atoms, saturated or unsaturated, unsubstituted or substituted by one or more halogen atoms or R.sup.2 is aryl, unsubstituted or substituted by one or more halogen atoms, with an alkali or alkaline earth fluoride, ammonium fluoride or a quaternary ammonium fluoride, of formula FNR.sup.3 R.sup.4 R.sup.5 R.sup.6, wherein R.sup.3, R.sup.4, R.sup.5, R.sup.6 are the same or different and are hydrogen, alkyl or aralkyl of 1-12 carbon atoms or a fluoride which is KHF.sub.2, NH.sub.4 HF.sub.2 or KSO.sub.2 F. The fluoride is activated by a complexing agent for the cation which is a cryptate, a cyclic or linear polyether or by means of a polar aprotic compound. The carbonate is split to give a reaction mixture containing an aldehyde and the fluoroformate which is removed from the reaction mixture.

REFERENCES:
patent: 3287388 (1966-11-01), Christe et al.
patent: 3696150 (1972-10-01), Lichstein et al.
Mitsubishi Chem., Chemical Abstracts, vol. 96:34601u.

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