Synthetically and biologically interesting N-acyl quinone imine ketals and N-acyl quinol imine ethers from anodic oxidation of anilides
作者:Chung Pin Chen、Chun Tzer Chou、John S. Swenton
DOI:10.1021/ja00237a077
日期:1987.2
Oxydation sur une electrode de platine dans le methanol-perchlorate de lithium de N-[methoxy-4 phenyl]-benzamide, -acetamide et d'(acylamino-2 methoxy-5) benzeneacetate d'ethyle
Lewis Acid Regulated Divergent Catalytic Reaction between Quinone Imine Ketals (QIKs) and 1,3‐Dicarbonyl Compounds: Switchable Access to Multiple Products Including 2‐Aryl‐1,3‐Dicarbonyl Compounds, Indoles, and Benzofurans
A catalytic Lewis acid regulated reaction between quinone imine ketals (QIKs) and 1,3-dicarbonyl compounds provides a divergent and tunable approach to a variety of skeletons, including a series of 2-aryl-1,3-dicarbonyl compounds, indoles, and benzofurans. The use of lithium chloride and ferrous bromide gives C3- or C2-alkylation products of the QIKs. The combination of ferrous bromide and trifluoromethanesulfonic
The synthetic utility of quinone imine ketals in the context of asymmetriccatalysis was disclosed for the first time. By expanding the utility of chiral Brønsted acid catalysis to the electrophilic activation of quinone imine ketals, we succeeded in the development of highly enantioselective arylation of encarbamates to give α-amino-β-aryl ethers wherein quinone imine ketals act as functionalized aromatic
Organocatalytic Asymmetric Arylative Dearomatization of 2,3-Disubstituted Indoles Enabled by Tandem Reactions
作者:Yu-Chen Zhang、Jia-Jia Zhao、Fei Jiang、Si-Bing Sun、Feng Shi
DOI:10.1002/anie.201408551
日期:2014.12.8
The organocatalytic asymmetric arylative dearomatization of indoles was achieved through two tandem approaches involving 2,3‐disubstituted indoles and quinoneimineketals. One approach utilized the enantioselective cascade 1,4 addition/alcohol elimination reaction, the other employed the one‐pot tandem arylative dearomatization/transfer hydrogenation sequence. In both cases, enantiomerically pure
A new reaction of nitrenium ions: carbon-carbon bond-forming reactions of p-alkoxy-substituted nitrenium ions
作者:Peter Dalidowicz、John S. Swenton
DOI:10.1021/jo00070a011
日期:1993.8
Reaction of N-acylquinone imine ketals with acid generates reactive intermediates which undergo carbon-carbon bond-forming reactions with electron-rich styrene derivatives.