Bismuth(III) Triflate: Novel and Efficient Catalyst for Claisen and Fries Rearrangements of Allyl Ethers and Phenyl Esters

Abstract

Bismuth(III) triflate catalyzed Claisen and Fries rearrangements of allyl phenyl ethers and phenyl acetates have been presented. The reaction proceeds smoothly and yields corresponding rearranged products in good yields. The bismuth triflate displays higher activity over the corresponding La, Yb, and Sc triflates.

Keywords:

• Claisen rearrangement
• Allyl ethers
• Fries rearrangement
• Phenyl esters
• Bismuth(III) triflate

Acknowledgments

Ch. Sridhar thanks the Council of Scientific and Industrial Research, New Delhi, India for awarding Senior Research Fellowship.