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Synthesis 2006(6): 1045-1049
DOI: 10.1055/s-2006-926344
DOI: 10.1055/s-2006-926344
PAPER
© Georg Thieme Verlag Stuttgart · New York
A Simple and Direct Access to Ethylidene Malonates
Further Information
Publication History
Received
29 June 2005
Publication Date:
27 February 2006 (online)


Abstract
The condensation of active methylene compounds 1 with acetaldehyde was efficiently promoted by a catalytic amount of lithium bromide in the presence of acetic anhydride to give ethylidene malonates 2 in 77-97% yield.
Key words
Knoevenagel condensations - catalysis - aldol reactions - aldehydes - substituent effects