Synthesis of Fused Furans and Thiophenes via Ruthenium-Catalyzed Atom-Transfer [2+2+1] Cycloadditions of α,ω-Diynes

Abstract

Furans and thiophenes are important five-membered heterocyclic compounds that are found in natural products, functional materials, and pharmaceutics. This account outlines our studies on ruthenium-catalyzed atom-transfer [2+2+1] cycloadditions toward the synthesis of fused furans and thiophenes.

1 Introduction

2 Synthesis of Furans using Dimethyl Sulfoxide as the Oxygen ­Donor

3 Synthesis of 2-Silylfurans Using Nitrones as Oxygen Donors

4 Synthesis of Thiophenes Using Thiocarbonyls as Sulfur Donors

5 Conclusions

Key words

ruthenium - [2+2+1] cycloaddition - atom-transfer reaction - metallacycle - diyne - furan - thiophene

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