1.
J Org Chem
; 76(19): 7901-11, 2011 Oct 07.
Artigo
em Inglês
| MEDLINE
| ID: mdl-21842863
RESUMO
An efficient and versatile synthesis of novel exo-imidazolidin-2-one dienes is described. This involves the base-assisted condensation/cyclization cascade reaction of the monoimino derivatives of diacetyl with a series of isocyanates. This methodology enables preparation of symmetrical dienes, as long as the substrates have the same N substituent. Moreover, use of different N-substituted starting materials leads to formation of nonsymmetrical dienes. The reactivity of these dienes was evaluated in Diels-Alder reactions, showing a high reactivity.