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Letters in Organic Chemistry

Author(s): Laurent Pascal, Jean Jacques Vanden Eynde, Yves Van Haverbekea and Philippe Dubois

DOI: 10.2174/1570178043488527

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Synthesis of π-Conjugated Systems from Methyldiazines and Aromatic Aldehydes under PTC Conditions and without Organic Solvent

Page: [112 - 118] Pages: 7

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Abstract

The condensation reactions of 4-methylpyrimidine and methylpyrazine with p-anisaldehyde have been studied in NaOH 5M in the presence of catalytic amount of a quaternary ammonium salt (“quat”). This study seems to give credit to a PTC/OH extraction process where an hydroxide ion would be transferred into the “pseudo organic phase” consisted by liquid reagents. However, an IPTC process cannot be ruled out for some of tested quats.

Keywords: methyldiazines, condensation reactions, reactions in aqueous medium, quaternary ammonium salts