Abstract

SACHDEVA, HARSHITA; SAROJ, REKHA; KHATURIA, SARITA  and  SINGH, HAR LAL. COMPARATIVE STUDIES OF LEWIS ACIDITY OF ALKYL-TIN CHLORIDES IN MULTICOMPONENT BIGINELLI CONDENSATION USING GRINDSTONE CHEMISTRY TECHNIQUE. J. Chil. Chem. Soc. [online]. 2012, vol.57, n.1, pp. 1012-1016. ISSN 0717-9707.  doi: 10.4067/S0717-97072012000100013.

A simple and efficient procedure for the one pot Biginelli Condensation Reaction of aldehydes, â-ketoester and urea employing SnCl₄.5H₂O /mono/di/tri-butyl- tin chloride as a novel catalyst is described. Compared to classical Biginelli reaction conditions, the present method has the advantages of good yields, short reaction times and experimental simplicity. Further, comparative efficiency of alkyl- tin chlorides in multicomponent Biginelli Condensation Reaction is also studied under solvent free conditions.

Keywords : Lewis Acids; Dihydropyrimidinones; Biginelli condensation; Grindstone technique; SnCl₄.5H₂O.