Synthesis of polyfunctionalized pyrroles bearing C-2 α-azido side-chains and displacement of the α-azido group by various nucleophiles
2018
Abstract Tetrasubstituted pyrroles bearing C-2 α-azido side-chains were synthesized employing a new class of diazides, α,γ-diazido α,β-unsaturated esters, and 1,3-dicarbonyl compounds under simple thermal conditions. Further investigation of the synthetic utility of the obtained pyrroles reveals unexpected displacement of the α-azido group at the C-2 side-chain by a variety of nucleophiles. This two-step process exhibits a broad substrate scope, good functional group tolerance, simple operation, and high reaction efficiency, providing an easy access to polyfunctional pyrroles with novel substitution patterns.
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