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.
Furber, Mark; Herbert, John M.; Taylor, Richard J. K., Journal of the Chemical Society. Perkin transactions I, 1989, p. 683 - 690
作者:Furber, Mark、Herbert, John M.、Taylor, Richard J. K.
DOI:——
日期:——
FURBER, MARK;HERBERT, JOHN M.;TAYLOR, RICHARD J. K., J. CHEM. SOC. PERKIN TRANS. PT 1,(1989) N, C. 683-690
作者:FURBER, MARK、HERBERT, JOHN M.、TAYLOR, RICHARD J. K.
DOI:——
日期:——
The preparation of 4-substituted pyrylium salts and their use in dienal synthesis
作者:Patchanee Charoenying、Karl Hemming、Darren McKerrecher、Richard J. K. Taylor
DOI:10.1002/jhet.5570330415
日期:1996.7
The unsubstituted pyrylium nucleus is shown to undergo reaction with cuprate or secondary Grignard organometallic reagents to give intermediate 4-substituted pyrans which are converted into the corresponding 4-substituted pyrylium salts (7 examples) in fair to good overall yield. The synthetic utility of the 4-substituted pyrylium heterocycles is demonstrated by their reaction with organolithium reagents