An approach to access 1-substituted isoquinolones has been developed through the addition–cyclization of imines with Grignard reagents in the presence of 2,2′-dipyridyl. A number of substituted aromatic magnesium reagents were amenable to this process, and the desired products were obtained with excellent yields and outstanding diastereoselectivities (dr > 99:1). The utility of this convenient approach
An enantioselective hydrogenolysis of 3-aryl-3-hydroxyisoindolin-1-ones under H2 has been developed by using Ir(I)/(R)-MeO-Biphep complex as a catalyst. Cyclic diaryl methylamides were obtained in moderate to excellent yields and up to 92% ee.
The enantioselective hydrogenolysis of racemic 3-aryl-3-hydroxyisoindolin-1-ones catalyzed by BINOL-derived chiral phosphoric acid with benzothiazoline as the hydride source is described. The corresponding cyclic diaryl methylamines are obtained in good to excellent yields and up to 91% enantioselectivities. (C) 2013 Elsevier Ltd. All rights reserved.