Silver-Catalyzed Cascade Radical Cyclization: A Direct Approach to 3,4-Disubstituted Dihydroquinolin-2(1<i>H</i>)-ones through Activation of the P–H Bond and Functionalization of the C(sp<sup>2</sup>)–H Bond
A silver-catalyzed cascade cyclization of cinnamamides with diphenylphosphine oxide was developed, in which activation of the P–H bond and functionalization of the C(sp2)–H bond occurred. A direct method for the synthesis of 3,4-disubstituted dihydroquinolin-2(1H)-ones was developed.
zation processes. The latter process occurs when there is a p-RO substituent on the aniline. This protocol affords straightforward new routes to separately synthesize quinoline-2-ones and spiro[4.5]decanes in moderate to good yields.
Copper-Catalyzed Aryltrifluoromethylation of<i>N</i>-Phenylcinnamamides: Access to Trifluoromethylated 3,4-Dihydroquinolin-2(1 <i>H</i>)-ones
作者:Qiang Wang、Guifang Han、Yuxiu Liu、Qingmin Wang
DOI:10.1002/adsc.201500261
日期:2015.8.10
A method for copper‐catalyzed aryltrifluoromethylation of N‐phenylcinnamamides is reported. This method provides a straightforward route to a variety of CF3‐containing 3,4‐dihydroquinolin‐2(1H)‐ones with excellent regioselectivity and diastereoselectivity.
The reaction of the readily available N-methyl-N-phenylcinnamamides with phenyliodinebis(trifluoroacetate) (PIFA) in the presence of Lewis acids provides a general and efficient assembly of a variety of 3-arylquinolin-2-one compounds. This novel approach features not only metal-free oxidative C(sp2)–C(sp2) bond formation but also an exclusive 1,2-aryl migration.
Metal-Free Synthesis of 3-Arylquinolin-2-ones from Acrylic Amides via a Highly Regioselective 1,2-Aryl Migration: An Experimental and Computational Study
Combined experimental and theoretical investigations into the phenyliodine bis(trifluoroacetate) (PIFA)-mediatedreaction of N-arylcinnamamide to produce 3-arylquinolin-2-one derivatives have been conducted. High regioselectivity during the aryl migration process was observed in 3,3-disubstituted acrylamides. Density functional theory calculation was conducted in an attempt to understand the mechanism