TITLE:
Phase Transfer Catalysis Improved Synthesis of 3,4-Dihydropyrimidinones
AUTHORS:
Hela Slimi, Khemaïs Saïd, Younes Moussaoui, Ridha Ben Salem
KEYWORDS:
Multicomponent Reaction; Biginelli Reaction; 3, 4-Dihydropyrimidinones; Phase-Transfer Catalysis; Quaternary Ammonium Salts
JOURNAL NAME:
International Journal of Organic Chemistry,
Vol.3 No.3A,
November
28,
2013
ABSTRACT: Various 3,4-dihydropyrimidinones can be prepared via Biginelli reaction in aqueous media by using quaternary ammonium salts of different alkyl groups (C4 and C8) and anions (Cl-and Br-) as catalysts. The use of quaternary ammonium salts along with longer alkyl chains increases the yield of the Biginelli reaction; however, bromide ammonium salts are less active than the chloride ones.