syn–anti-Stereoselection in the Diels–Alder reactions of 1,2,3,4,5-pentamethylcyclopentadiene
作者:D. Jean Burnell、Zdenek Valenta
DOI:10.1039/c39850001247
日期:——
Very similar syn-anti-adduct ratios were observed when 1,2,3,4,5-pentamethylcyclopentadiene reacted with a variety of (Z)-ethylenic dienophiles, suggesting that in the exo region the transition-state geometries are very similar.
Fluorous Dienophiles Are Powerful Diene Scavengers in Diels−Alder Reactions
作者:Stefan Werner、Dennis P. Curran
DOI:10.1021/ol035214a
日期:2003.9.1
[reaction: see text] Three fluorous dienophiles have been synthesized, and their value in scavenging an excess diene after Diels-Alderreactions is shown. The resulting fluorous derivatives are separated by solid-phase extraction on fluorous silica gel (FSPE). The fluorous [1,2,4]triazoline-3,5-dione 10 reacted with most dienes within seconds or minutes.