All at once: Microwave irradiation of a metal‐free mixture of propargyl enolethers and primary amines generates substituted alkyl 1,2‐dihydropyridine‐3‐carboxylates in excellent yields through a domino process (see scheme). The obtained 1,2‐dihydropyridines feature four possible diversity points and a chemical handle for complexity‐diversity generation (carboxylic ester at the C3 position).
A Microwave-Assisted Domino Rearrangement of Propargyl Vinyl Ethers to Multifunctionalized Aromatic Platforms
作者:David Tejedor、Gabriela Méndez-Abt、Leandro Cotos、Miguel A. Ramirez、Fernando García-Tellado
DOI:10.1002/chem.201003532
日期:2011.3.14
H makes a difference! A novel reactivity profile of propargyl vinyl ethers has been developed, which is controlled by the presence of a hydrogen atom at the homopropargylic position (see scheme; EWG=electron‐withdrawing group). This strategy was conveniently used to construct multifunctionalized phenolic platforms, including salicylaldehydes and the corresponding ketone derivatives.