2-Alkenyl dioxolanylium cations, new reactive dienophiles in low temperature asymmetric Diels-Alder reactions
作者:Arnaud Haudrechy、Willy Picoul、Yves Langlois
DOI:10.1016/s0957-4166(96)00470-3
日期:1997.1
orthoesters 14–22 were prepared by an exchange reaction with orthoester 13. These compounds, after treatment with trimethylsilytriflate or tin(IV) chloride, gave rise to vinyl dioxolanylium cations which proved to be very reactive dienophiles in various Diels-Alder reactions.
CALOGEROPOULOU, THEODORA;WIEMER, DAVID F., J. ORG. CHEM., 53,(1988) N 10, 2295-2299
作者:CALOGEROPOULOU, THEODORA、WIEMER, DAVID F.
DOI:——
日期:——
Cycloaddition reactions of phosphate dienes
作者:Theodora Calogeropoulou、David F. Wiemer
DOI:10.1021/jo00245a030
日期:1988.5
Utility of 2‐Diphenylphosphoryloxy‐1,3‐Dienes in Multicomponent Hetero‐Diels–Alder Reactions to Construct Functionalized Six‐Membered Nitrogen Heterocycles
作者:Qiuyu He、Lirong Cao、Yiran Wei、Gregory R. Dake
DOI:10.1002/chem.202201328
日期:2022.7.26
The utility of 2-diphenylphosphoryloxy-1,3-dienes for the construction of substituted six-membered nitrogen heterocycles is presented. These dienes undergo boron trifluoride-promoted aza-Diels-Alder reactions when reacted with imines or related species formed in situ using aldehydes and amine derivatives. The stability of the dienes allows this three-component reaction to be carried out with no special