One-Pot Double-Annulation Strategy for the Synthesis of Unusual Fused Bis-Heterocycles
作者:Shukree Abdul-Rashed、Georgios Alachouzos、William W. Brennessel、Alison J. Frontier
DOI:10.1021/acs.orglett.0c01351
日期:2020.6.5
A novel metal-free double-annulation cascade for the construction of unusual fused heterocyclic systems is described. This simple protocol enables the sequential assembly of two rings in one pot from two simple precursors. Acidic conditions promote the condensation and the intramolecular alkynyl Prins reaction of an enyne or arenyne alcohol with a cyclic hemiaminal to form a five-, six-, or seven-membered