The Use of Pyrylium Tetrafluoroborate for the Stereoselective Synthesis of 2<i>Z</i>,4<i>E</i>-Dienals
作者:Yuri Y. Belosludtsev、Bennett C. Borer、Richard J. K. Taylor
DOI:10.1055/s-1991-26456
日期:——
The addition of organolithium reagents to pyrylium tetrafluoroborate followed by in situ electrocyclic ring opening of the intermediate 2H-pyrans gives the title Z,E-dienals with high stereoselectivity.