Synthesis 2012; 44(12): 1923-1927
DOI: 10.1055/s-0031-1289757
paper
© Georg Thieme Verlag Stuttgart · New York

Cycloaddition/Aromatization Sequence for the Synthesis of 2,3-Disubstituted Benzenephosphonates

Elise Villemin
Université catholique de Louvain, Institute of Condensed Matter and Nanosciences (ICMN), Molecules, Solids and Reactivity (MOST), Bâtiment Lavoisier, Place Louis Pasteur, L4.01.02, 1348 Louvain-la-Neuve, Belgium, Fax: +32(10)474168   Email: Jacqueline.marchand@uclouvain.be
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Jacqueline Marchand-Brynaert*
Université catholique de Louvain, Institute of Condensed Matter and Nanosciences (ICMN), Molecules, Solids and Reactivity (MOST), Bâtiment Lavoisier, Place Louis Pasteur, L4.01.02, 1348 Louvain-la-Neuve, Belgium, Fax: +32(10)474168   Email: Jacqueline.marchand@uclouvain.be
› Author Affiliations
Further Information

Publication History

Received: 13 February 2012

Accepted after revision: 18 March 2012

Publication Date:
26 April 2012 (online)


Abstract

The [4+2] cycloaddition of diethyl 1-phosphonobuta-1,3-diene with tetracyanoethylene, (E)-1,4-diphenylbut-2-ene-1,4-dione, N-phenylmaleimide, and dialkyl acetylenedicarboxylates is described. For the last two cases, treatment of the cycloadducts with nitrobenzene and a palladium catalyst allows the aromatization. Selective deprotections lead to phthalimide/phthalate derivatives with an ortho-phosphonic acid function.

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