A novel and selective protocol for the synthesis of 1-allyl-2-ethynylbenzenes has been developed by palladium-catalyzed decarboxylative coupling of allylic alkynoates with arynes. This new route allows for both sp−sp2 and sp2−sp3 couplings of allylic alkynoates with arynes in one pot involving a decarboxylation process.
A Concomitant Allylic Azide Rearrangement/Intramolecular Azide–Alkyne Cycloaddition Sequence
作者:Rakesh H. Vekariya、Ruzhang Liu、Jeffrey Aubé
DOI:10.1021/ol500011f
日期:2014.4.4
An intramolecular Huisgen cycloaddition of an interconverting set of isomeric allylicazides with alkynes affords substituted triazoles in high yield. The stereoisomeric vinyl-substituted triazoloxazines formed depend on the rate of cycloaddition of the different allylicazide precursors when the reaction is carried out under thermal conditions. In contrast, dimerized macrocyclic products were obtained