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

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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.
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Keywords: condensation reactions; methyldiazines; quaternary ammonium salts; reactions in aqueous medium

Document Type: Review Article

Affiliations: Laboratoire de Chimie Organique, Universite de Mons-Hainaut, Avenue Maistriau 19, B-7000 Mons, Belgium.

Publication date: 2004-04-01

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