Synlett 2014; 25(6): 881-883
DOI: 10.1055/s-0033-1340845
letter
© Georg Thieme Verlag Stuttgart · New York

Preyssler Heteropoly Acids Encapsulated in a Silica Framework for an ­Efficient Preparation of Fluorinated Hexahydropyrimidine Derivatives under Solvent-Free Conditions

Ángel G. Sathicq*
a   Centro de Investigación y Desarrollo en Ciencias Aplicadas ‘Dr. Jorge J. Ronco’ (CINDECA-CCT-CONICET), Universidad Nacional de La Plata, Calle 47 No. 257, B1900AJK La Plata, Argentina   Email: agsathicq@quimica.unlp.edu.ar   Email: gpr@quimica.unlp.edu.ar   Fax: +54(221)4211353125
,
Diego M. Ruiz
b   Cátedra de Química Orgánica, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, Calles 60 y 119 s/n, B1904AAN La Plata, Argentina
,
Tierry Constantieux
c   Institut des Sciences Moléculaires de Marseille-UMR CNRS 7313 iSm2, Aix-Marseille Université Centre Saint Jérôme, Service 531, 13397 Marseille Cedex 20, France
,
Jean Rodriguez
c   Institut des Sciences Moléculaires de Marseille-UMR CNRS 7313 iSm2, Aix-Marseille Université Centre Saint Jérôme, Service 531, 13397 Marseille Cedex 20, France
,
Gustavo P. Romanelli*
a   Centro de Investigación y Desarrollo en Ciencias Aplicadas ‘Dr. Jorge J. Ronco’ (CINDECA-CCT-CONICET), Universidad Nacional de La Plata, Calle 47 No. 257, B1900AJK La Plata, Argentina   Email: agsathicq@quimica.unlp.edu.ar   Email: gpr@quimica.unlp.edu.ar   Fax: +54(221)4211353125
b   Cátedra de Química Orgánica, Facultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, Calles 60 y 119 s/n, B1904AAN La Plata, Argentina
› Author Affiliations
Further Information

Publication History

Received: 28 December 2013

Accepted after revision: 28 January 2014

Publication Date:
06 March 2014 (online)


Abstract

A series of trifluoromethylated hexahydropyrimidines was synthesized using Preyssler heteropoly acid H14NaP5W29MoO110 encapsulated in a silica framework as the catalyst under solvent-free conditions. This synthesis requires short reaction times (1.5 h) and 80 °C under solvent-free conditions to obtain good to excellent yields of 18 hexahydropyrimidine derivatives. Preyssler catalyst embedded in the silica matrix, unlike the bulk or supported on silica, is insoluble in polar media such as acetone, ethanol, or methanol, which allows easy removal of the reaction products without affecting catalytic activity.

Supporting Information

 
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