An interesting iron‐catalyzed protocol for the synthesis of 2‐aminofurans has been developed. Starting from 2‐haloketones and tertiary amines or enamines, various 2‐aminofurans were produced in good yields.
chemoselective and allows for a wide variety of functional groups such as esters, ketones, aldehydes, and imines to be tolerated. Furthermore, a modification of this one-pot procedure gives access to the corresponding triazoles. The chemically stable amide functionality is demonstrated to be an efficient synthetic handle for the formation of highly substituted triazolines or triazoles.
In the presence of catalytic amounts of cesium hydroxide (CsOH·H2O), alcohols, substituted anilines and heterocyclic amines undergo an addition in NMP to phenylacetylene leading to functionalized enol ethers and enamines. Anilines add to styrene (90–120°C, 12–14 h) leading to N-substituted anilines in satisfactory yields.