Process for preparing dialkyl dicarbonates

Details Process for preparing dialkyl dicarbonates Process for preparing dialkyl dicarbonates

2005-04-30

2008-09-02

Eyler, Yvonne (Department: 1621)

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

Organic compounds

Carbonate esters

C562S894000, C558S276000

Reexamination Certificate

active

07420076

ABSTRACT:
The novel process for preparing dialkyl dicarbonates by reacting the corresponding alkyl haloformates with alkali metal hydroxides, alkaline earth metal hydroxides and/or carbonates in the presence of water-immiscible organic solvents and in the presence of a catalyst is characterized in that the catalyst used is at least one tertiary alkylamine of the formula (I)in-line-formulae description="In-line Formulae" end="lead"?NR1R2R3,  (I)in-line-formulae description="In-line Formulae" end="tail"?where the substituents are each as defined in the description.

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