Synlett 2007(1): 0043-0046  
DOI: 10.1055/s-2006-958443
LETTER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of 5-Aroyldihydropyrimidinones via Liebeskind-Srogl Thiol Ester-Boronic Acid Cross-Couplings

Hana Prokopcová, Leonardo Pisani, C. Oliver Kappe*
Christian Doppler Laboratory for Microwave Chemistry and Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria
Fax: +43(316)3809840; e-Mail: oliver.kappe@uni-graz.at;
Further Information

Publication History

Received 6 August 2006
Publication Date:
20 December 2006 (online)

Abstract

A novel and efficient two-step synthesis of 5-aroyl-3,4-dihydropyrimidin-2-ones is reported. These privileged ketone structures are readily generated by microwave-assisted Liebeskind-Srogl-type coupling of boronic acids with the corresponding pyr­imidone thiol esters. The thiol esters themselves are easily prepared using Biginelli multicomponent chemistry.

19

For base-catalyzed Suzuki reactions of 3-bromophenyl-DHPMs with boronic acids, see ref. 12e.