Recently we reported a new synthesis of quinazoline ring starting from N-imidoyliminotriphenylphosphoranes and aromatic aldehydes. The proposed mechanism was proved by an indipendent synthesis of the 1,3-diaza-1,3-diene intermediates. These diene derivatives when heated either in xilene or benzene give quantitatively the corresponding 3,4-dihydroquinazolines.
Tandem aza-Wittig reaction/electrocyclic ring closure. 3,4-dihydroquinazoline from N-imidoyliminotriphenylphosphorane and aromatic aldehydes / E. Rossi, R. Stradi. ((Intervento presentato al 14. convegno European Colloquium on Heterocyclic Chemistry tenutosi a toledo nel 1990.
Tandem aza-Wittig reaction/electrocyclic ring closure. 3,4-dihydroquinazoline from N-imidoyliminotriphenylphosphorane and aromatic aldehydes
E. RossiPrimo
;
1990
Abstract
Recently we reported a new synthesis of quinazoline ring starting from N-imidoyliminotriphenylphosphoranes and aromatic aldehydes. The proposed mechanism was proved by an indipendent synthesis of the 1,3-diaza-1,3-diene intermediates. These diene derivatives when heated either in xilene or benzene give quantitatively the corresponding 3,4-dihydroquinazolines.
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