Divergent synthesis of arylated pyridin-2(1H)-one derivatives via metal-catalysed cross-coupling processes
作者:Jamie S. Siddle、Andrei S. Batsanov、Stuart T. Caldwell、Graeme Cooke、Martin R. Bryce
DOI:10.1016/j.tet.2010.05.108
日期:2010.8
1,5-Di(hetero)arylated-pyridin-2(1H)-one derivatives have been readily obtained in good yields starting from 2-fluoro-5-pyridylboronic acid. The sequence comprises three steps: (i) palladium-catalysed Suzuki-Miyaura reaction; (ii) base-catalysed hydrolysis; (iii) copper-catalysed C–N coupling. X-ray crystal structures are reported for selected pyridin-2(1H)-one derivatives. These compounds are of interest
The synthesis of 6,6- and 5,6-bicyclic pyridone scaffolds has been completed using (i) an intramolecular Mitsunobu reaction and/or (ii) hydrolysis of a bicyclic pyridinium salt intermediate. Regioselective functionalization of the pyridone ring has been achieved via either direct lithiation or use of the "halogen dance" reaction. Suzukicoupling then allows introduction of aryl units at C(7)/C(9) or