Catalysis of the Claisen rearrangement

Synthesis, stereochemistry, structural classification, and chemical reactivity of natural pterocarpans.

An easily accessible ionic liquid, 1-methyl-3-pentylimidazolium fluoroborate, [pmIm]BF4, has been demonstrated to be an efficient catalyst as well as reaction medium for the stereoselective debromination of a variety of structurally diverse vicinal-dibromides to the corresponding (E)-alkenes in high yields under microwave irradiation. This reaction does not require any organic solvent and any metal or any conventional reducing agent, and the ionic liquid is recycled without any appreciable loss of its catalytic efficiency.

Catalysis by ionic liquid. A green protocol for the stereoselective debromination of vicinal-dibromides by [pmIm]BF4 under microwave irradiation.

2.24 – Pyrans and Fused Pyrans: (iii) Synthesis and Applications

A simple approach to highly functionalized benzo[b]furans from phenols and aryl iodides via aryl propargyl ethers

Acid catalysis of the Claisen rearrangement. 2. Formation of the benzofurobenzopyran and benzofuro[3,2-b]benzofuran skeletons from 1,4-bis(aryloxy)-2-butynes

Michael C. Jones

Papers

Acid catalysis of the Claisen rearrangement. 2. Formation of the benzofurobenzopyran and benzofuro[3,2-b]benzofuran skeletons from 1,4-bis(aryloxy)-2-butynes

Acid catalysis of the Claisen rearrangement. 1. Formation of 4,4'-bis(2H-chromenyl)mercury derivatives from aryl 2-propynyl ethers