synthesis and some transformations of 4-oxo-2-(β-ethoxyvinyl)-4H-1,3-benzoxazinium salts

Autor:	Dorofeenko, G. N., Mezheritskii, V. V., Ryabukhin, Yu. I., Ivanova, O. V., Minyaeva, L. G.
Zdroj:	Chemistry of Heterocyclic Compounds; March 1977, Vol. 13 Issue: 3 p253-259, 7p
Abstrakt:	A method was developed for the synthesis of 4-oxo-(ß-ethoxyvinyl)-4H-1,3-benzoxazinium salts by condensation of oxo-2-alkylbenzoxazinium salts by condensation of oxo-2-alkylbenzoxazinium salts with ethyl orthoformate. During hydrolysis and aminolysis, attack of the nucleophile is directed to the ß-carbon atom of the benzoxazinium salts. The previously unknown 2-formylmethylene-4-oxo-3,4-dihydro-2H-1,3-benzoxazines and their nitrogen derivatives were obtained.
Databáze:	Supplemental Index
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