Synthesis of Taiwaniaquinoids via Nazarov Triflation
摘要:
A unified approach toward the taiwaniaquinoids that has yielded four natural products is described. A new variant of the Nazarov reaction with concomitant formation of an enol triflate serves as one of the key steps, considerably shortening the synthetic scheme and providing a general entry into this class of bioactive natural products.
Behavior of Carbonyl Ylide Generated from 3-Chloro-3-(<i>p</i>-nitrophenyl)diazirine and Acetone. 1,3-Dipolar Cycloaddition to Benzaldehyde and Epoxide Formation
作者:Toshikazu Ibata、Jiro Toyoda、Michael T. H. Liu
DOI:10.1246/cl.1987.2135
日期:1987.11.5
A carbonylylide generated from 3-chloro-3-(p-nitrophenyl)diazirine and acetone either 1,3-dipolar cycloadds to benzaldehydes to afford 2,2-dimethyl-4-aryl-5-(p-nitrophenyl)-dioxole or intramolecularly cyclizes to give 2-chloro-2-methyl-3-(p-nitrophenyl)-3-propanone and 2-methyl-3-(p-nitrophenyl)-1-propene-3-one as final products.