Bio-based propargyl ether thermosetting resins with trans-stilbene cores were synthesized from cinnamic acids. Photochemical isomerization enhanced processability and enabled the fabrication of fire-resistant cross-linked networks.
A photoredox promoted decarboxylative C–H glycosylation has been developed for the synthesis of heteroaryl C-glycosides.
An unusual participation of the O-propargyl alkyne group during the cyclization of 6-hydroxy-2-propargyl ethers of aryl chalcones afforded highly functionalized 2-acyl-3-styrylbenzofuran and 8-aryl dibenzo[b,d]furan-1,7-diol derivatives. A plausible mechanism and scope of the reaction is provided.
The synthesis of fused chromono-thiophenes and -thiopyrans are achieved from 4-hydroxythiocoumarin derivatives utilising simple alkylation followed by [3,3]-sigmatropic rearrangement and subsequent solvent-dependent divergent ring closure reactions.
This review provides an overview of gold-catalyzed reactions for quinoline synthesis which have been described so far.