Synthesis and properties of 2, 2′??pyrromethene??5 [1H]??one analogues: The furan, thiophene, benzene, 4??methoxybenzene, 2??pyridine and 4??pyridine analogues

…, H Jansen, R Fokkens, J Lugtenburg

Index: Groot, J. A. de; Jansen, H.; Fokkens, R.; Lugtenburg, J. Recueil: Journal of the Royal Netherlands Chemical Society, 1983 , vol. 102, # 2 p. 114 - 118

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Abstract

Abstract Condensation of furfural, thiophene-2-carboxaldehyde, benzaldehyde, 4- methoxybenzaldehyde, pyridine-2-carboxaldehyde and pyridine-4-carboxaldehyde with 3, 4- dimethyl-3-pyrrolin-2-one leads to the Z-2, 2′-pyrromethene-5 [1H]-one analogues. Following irradiation with light, the E forms have been isolated and characterized. Complete thermal E [RIGHTWARDS ARROW] Z isomerization is observed upon heating in basic ...