Issue 4, 2001
From the journal:

New Journal of Chemistry

Double 1,4-addition of malonate to 1,2-diaza-1,3-butadienes: a useful route to previously unknown symmetric and unsymmetric 1,6-dioxo-2,7-diazaspiro[4.4]nona-3,8-dienes†

Orazio A. Attanasi,*a   Lucia De Crescentini,a   Paolino Filipponea  and  Fabio Mantellinia  

* Corresponding authors

a Istituto di Chimica Organica, Uniersità di Urbino, Piazza della Repubblica 13, Urbino, Italy
E-mail: attanasi@uniurb.it
Fax: Fax: +39 0722 2907

Abstract

In the presence of sodium methoxide in tetrahydrofuran, 1,2-diaza-1,3-butadienes react with dimethyl malonate in a 2:1 molar ratio to give symmetric or unsymmetric bishydrazones that in turn produce new 1,6-dioxo-2,7-diazaspiro[4.4]nona-3,8-dienes, as a consequence of a double ring closure, on treatment with sodium methoxide in methanol.

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Article information

DOI
https://doi.org/10.1039/B009189H
Article type
Letter
Submitted
17 Oct 2000
Accepted
13 Feb 2001
First published
21 Mar 2001

New J. Chem., 2001,25, 534-537

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Double 1,4-addition of malonate to 1,2-diaza-1,3-butadienes: a useful route to previously unknown symmetric and unsymmetric 1,6-dioxo-2,7-diazaspiro[4.4]nona-3,8-dienes

O. A. Attanasi, L. De Crescentini, P. Filippone and F. Mantellini, New J. Chem., 2001, 25, 534 DOI: 10.1039/B009189H

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