An efficient controlled synthesis of bent-core oligoarenes and heteroarenes through ring transformation of 2H-pyran-2-ones
摘要:
A general controlled synthesis of oligoarenes and heteroarenes through base-catalyzed ring transformation of 6-aryl-4-(pyrrolidin-1-yl)-2H-pyran-2-one-3-carbonitriles (1a-d) and methyl 6-aryl-4-methylthio-2H-pyran-2-one-3-carboxylates (le-h) is described. This procedure offers flexibility in the fabrication of diverse oligoarene ring systems in a controlled fashion. (C) 2003 Elsevier Science Ltd. All rights reserved.
2H-Pyronederivatives were synthesized through the reaction of aryl acetyl compounds with ketene dithioacetals in the presence of sodium hydroxide, and they showed very strong fluorescence in the solid state. The light-emitting region of these 2H-pyrones is 447-630 nm in the solid states.
Synthesis of Benzocyclobutanes through Ring Transformation Reactions of 2<i>H</i>-pyran-2-ones
作者:Vishnu Ji Ram、Diptesh Sil、Ashoke Sharon、Ramendra Pratap、Prakas R. Maulik
DOI:10.1055/s-2004-831292
日期:——
A one-pot synthesis of benzocyclobutane (3a-n) has been developed through base-induced ring transformation reactions of 6-aryl-4-substituted-2H-pyran-2-one-3-carbonitriles (1a-c) and methyl 6-aryl-4-methylsulfanyl-2H-pyran-2-one-3-carboxylate (1d) by cyclobutanone.