Abstract
In this contribution we describe a series of pyranylidene derivatives bearing bromine atoms in various positions. Some of these bromo derivatives have been converted in carboxylic acid by halogen-metal exchange reaction using gaseous CO2 as electrophile. Selected compounds have been studied by UV-visible absorption and cyclic voltametry to study the influence of the substituent on the pyranylidene core.
Keywords: Methylenepyrans, wittig reaction, halogen-metal exchange, aromatic bromide, carboxylic acid, electroactive compounds.
Graphical Abstract
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