Iron-catalyzed C–C bond formation via cross dehydrative coupling reaction of N-heterocyclic aminols with electron rich arenes: facile access to C4-aryl-dihydroquinazolines
摘要:
The direct coupling of sp(3) C-OH bond of N -heterocyclic aminols with sp(2) C-H bond of electron rich arenes have been achieved via iron catalyzed dehydrative cross coupling strategy. This novel protocol provides an efficient and straight forward route to access biologically important C4-aryl-3,4dihydroquinazoline derivatives through the reaction of C4-hydroxy-3,4-dihydroquinazolineiaminol with phenol and aniline derivatives under mild reaction conditions. (C) 2015 Elsevier Ltd. All rights reserved.
Transition Metal-Free α-C(<i>sp</i><sup>3</sup>)H Bond Functionalization of Amines by Oxidative Cross Dehydrogenative Coupling Reaction: Simple and Direct Access to C-4-Alkylated 3,4-Dihydroquinazoline Derivatives
A transitionmetal-freecatalyticsystem has been developed for the cross dehydrogenative coupling of amines with nitroalkanes under mild condition employing potassium iodide/tert-butyl hydrogen peroxide catalyticsystem. This methodology was further extended for the construction of biologically important N-heterocycles, namely, 3,4-dihydroquinazoline derivatives. This novel strategy provides a simple