111157-80-3Relevant academic research and scientific papers
CYCLIZATION OF N-ALKYLAZINIUM CATIONS WITH BIFUNCTIONAL NUCLEOPHILES. 16. ?-ADDUCTS OF QUINOXALINIUM SALTS WITH AMINES, ALCOHOLS, AND ENOLATES AND THEIR ROLE IN CYCLIZATIONS WITH β-DICARBONYL COMPOUNDS
Charushin, V. N.,Ponizovskii, M. G.,Chupakhin, O. N.,Sidorov, E. O.,Sosonkin, I. M.
, p. 564 - 572 (1985)
In the reaction of N-methylquinoxalinium iodide with acetylacetone at -30 deg C, the formation of 3-acetyl-2,4-dimethyl-3a,4,9,9a-tetrahydrofuroquinoxaline has been recorded by 1H NMR spectroscopy, this being a regioisomer of the 3-acetyl-2,9-dimethyl-3a,4,9,9a-tetrahydrofuroquinoxaline formed in this reaction at temperatures above -10 deg C. ?-Adducts of the N-methylquinoxalinium cation with alcohols, amines, and β-diketones have also been identified, and their role in cyclizations leading to the annelation of a furan ring is discussed.
