domino reaction involving Lewis acid-mediated nucleophilic-substitution/intramolecular-cyclization/reverse Claisen condensation of 2-(aryl(piperidin-1-yl)methyl)phenols and 1,3-diketones has been developed for the synthesis of 2-(3-oxo-1-phenylbutyl)phenyl acetates in good to excellent yields (77%–95%). The construction of the products has been accomplished via the domino generation of two new σ-bonds
FeCl<sub>3</sub>-Mediated One-Pot Domino Reactions for the Synthesis of 9-Aryl/9-Arylethynyl-2,3,4,9-tetrahydro-1<i>H</i>-xanthen-1-ones from Propargylic Amines/Diaryl Amines and 1,3-Cyclohexanediones
An efficient, environmentally friendly and one-pot route to new 9-aryl/9-arylethynyl-2,3,4,9-tetrahydro-1H-xanthen-1-one derivatives from inexpensive starting materials has been developed. This method proceeded by a domino nucleophilic-substitution/intramolecular cyclization/dehydration sequence of propargylic amines/diaryl amines and 1,3-cyclohexanediones under the promotion of FeCl3, which involved