Ultrasound-assisted one pot synthesis of polysubstituted <i>meta</i>-terphenyls using ring transformation strategy
作者:Samata E. Shetgaonkar、Fateh V. Singh
DOI:10.1080/00397911.2019.1591454
日期:2019.4.18
An ultrasound-assisted rapid synthesis of meta-terphenyls 9 by the carbanion-induced ring transformation reaction of 6-aryl-5-methyl-2H-pyran-2-ones 7 with functionalized ketones 8 under basic conditions at room temperature has been delineated. The present method gives an easy access to functionally crowded m-terphenyls 9 with notable features including mild reaction condition, remarkable functional groups tolerance, shorter reaction time and high product yields.[GRAPHICS].
Synthesis and fluorescence of 2<i>h</i>-pyrone derivatives for organic light-emitting diodes (OLED)
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.
Versatile Synthesis of Functionalized Tetrahydroisoquinolines by Ring Transformation of 2H-Pyran-2-ones
作者:Priyanka B. Kole、Fateh V. Singh
DOI:10.1071/ch19046
日期:——
precursors for the construction of numerous heterocyclic compounds of therapeutic importance. In this paper we have illustrated an efficient synthesis of highly substituted tetrahydroisoquinolines from 2H-pyran-2-ones via nucleophile-mediated ringtransformation with tert-butyl-4-oxopiperidine-1-carboxylate followed by acid-mediated cleavage of the tert-butyloxycarbonyl group. The products were achieved