Synthesis 2007(19): 3017-3020  
DOI: 10.1055/s-2007-983897
PAPER
© Georg Thieme Verlag Stuttgart · New York

Acidic Alumina as a Useful Heterogeneous Catalyst in the Michael Reaction of β-Dicarbonyl Derivatives with Conjugated Nitroalkenes

Roberto Ballini*a, Raimondo Maggib, Alessandro Palmieria, Giovanni Sartorib
a Green Chemistry Group, Dipartimento di Scienze Chimiche, Università, Via S. Agostino 1, 62032 Camerino (MC), Italy
Fax: +39(0737)402297; e-Mail: roberto.ballini@unicam.it;
b Clean Synthetic Methodologies Group, Dipartimento di Chimica Organica e Industriale, Università, Consorzio Interuniversitario ‘La Chimica per l"Ambiente’ (INCA), UdR di Parma 2, Viale G.P. Usberti 17A, 43100 Parma, Italy
Further Information

Publication History

Received 27 June 2007
Publication Date:
11 September 2007 (online)

Abstract

Addition of a variety of 1,3-dicarbonyl derivatives to conjugated nitroalkenes was efficiently performed under heterogeneous catalysis by acidic alumina in the presence of a minimum amount of solvent (Et2O, 0.5 mL/mmol). The procedure allows satisfactory to good yields of a diastereomeric mixture (˜1:1) of polyfunctionalized adducts. Moreover, work-up can be avoided since the reaction mixture can be directly charged into a chromatographic column for immediate purification.