Method of preparing alkoxymethylenemalonic acid esters

Details Method of preparing alkoxymethylenemalonic acid esters Method of preparing alkoxymethylenemalonic acid esters

1975-05-30

1977-11-15

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

C07C 6966

Patent

active

040585530

ABSTRACT:
Preparation of alkoxymethylene malonic acid ester of formula: ##STR1## wherein R and each R' is an alkyl group, by reaction of malonic acid diester and ortho formic acid triester. The reaction is performed in the presence of a carboxylic acid or a carboxylic acid anhydride and a Lewis acid. The ortho ester is initially present in amount of at least 1,4 mols per mole of the malonic acid ester starting material. Alcohol formed during the reaction is removed during the reaction.

REFERENCES:
patent: 3637812 (1972-01-01), Tull

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