Intramolecular addition of diarylmethanols to imines promoted by KOt-Bu/DMF: a new synthetic approach to indole derivatives

2016 ◽  
Vol 14 (17) ◽  
pp. 4071-4076 ◽  
Author(s):  
Jia-hua Chen ◽  
Zi-cong Chen ◽  
Hong Zhao ◽  
Ting Zhang ◽  
Wei-juan Wang ◽  
...  
Keyword(s):  
Synthetic Approach ◽  
Indole Derivatives

KOt-Bu/DMF promoted intramolecular addition of diarylmethanols to imines was developed.

Synthetic approach to preparation of indole derivatives fused with a bicyclo[3.3.1]nonane framework

2007 ◽  
Vol 43 (8) ◽  
pp. 1196-1201 ◽  
Author(s):  
T. Yu. Baranova ◽  
O. N. Zefirova ◽  
N. V. Averina ◽  
V. V. Boyarskikh ◽  
G. S. Borisova ◽  
...  
Keyword(s):  
Synthetic Approach ◽  
Indole Derivatives

ChemInform Abstract: Intramolecular Addition of Diarylmethanols to Imines Promoted by KOt-Bu/DMF: A New Synthetic Approach to Indole Derivatives.

ChemInform ◽  
2016 ◽  
Vol 47 (35) ◽  
Author(s):  
Jia-hua Chen ◽  
Zi-cong Chen ◽  
Hong Zhao ◽  
Ting Zhang ◽  
Wei-juan Wang ◽  
...  
Keyword(s):  
Synthetic Approach ◽  
Indole Derivatives

Silver(i)-catalyzed annulation for the regioselective synthesis of N-imino-γ-carbolinium ylides from hydrazones of indole-3-carbonyl derivatives and propargylic alcohols

2014 ◽  
Vol 12 (47) ◽  
pp. 9514-9518 ◽  
Author(s):  
Yu Zhu ◽  
Xin-Rui Shen ◽  
Hai-Tao Tang ◽  
Min Lin ◽  
Zhuang-Ping Zhan
Keyword(s):  
Regioselective Synthesis ◽  
Synthetic Approach ◽  
Indole Derivatives ◽  
Propargylic Alcohols ◽  
Carbonyl Derivatives

A regioselective efficient synthetic approach to N-imino-γ-carbolinium ylides via AgOTf-catalyzed iminoannulation from indole derivatives and propargylic alcohols has been developed.

ChemInform Abstract: Synthetic Approach to Preparation of Indole Derivatives Fused with a Bicyclo[3.3.1]nonane Framework.

ChemInform ◽  
2008 ◽  
Vol 39 (7) ◽  
Author(s):  
T. Yu. Baranova ◽  
O. N. Zefirova ◽  
N. V. Averina ◽  
V. V. Boyarskikh ◽  
G. S. Borisova ◽  
...  
Keyword(s):  
Synthetic Approach ◽  
Indole Derivatives

Synthetic approach to preparation of indole derivatives fused with a bicyclo[3.3.1]nonane framework

2007 ◽  
Vol 43 (8) ◽  
pp. 1151-1157
Author(s):  
A. V. Baranovskii ◽  
R. P. Litvinovskaya ◽  
V. A. Khripach
Keyword(s):  
Synthetic Approach ◽  
Indole Derivatives

Catalytic enantioselective synthesis of indolizino[8,7-b]indole alkaloid derivatives based on the tandem reaction of tertiary enamides

2021 ◽  
Author(s):  
Xin-Ming Xu ◽  
Ming Xie ◽  
Jiazhu Li ◽  
Mei-Xiang Wang
Keyword(s):  
Indole Alkaloid ◽  
Enantioselective Synthesis ◽  
High Yield ◽  
Tandem Reaction ◽  
Indole Derivatives

An exquisite Pybox/Cu(OTf)2-catalyzed asymmetric tandem reaction of tertiary enamides was developed, which enabled the expeditious synthesis of indolizino[8,7-b]indole derivatives in high yield, excellent enantioselectivity and diastereoselectivity.

New Insights into the Nature of the Band Gap of CuGeO3 Nanoparticles: Synthesis, Electronic Structure, and Optical and Photocatalytic Properties

2019 ◽  
Author(s):  
Victor Y. Suzuki ◽  
Luís Henrique Cardozo Amorin ◽  
Natália H. de Paula ◽  
Anderson R. Albuquerque ◽  
Julio Ricardo Sambrano ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Band Gap ◽  
Material Design ◽  
Photocatalytic Properties ◽  
Critical Parameters ◽  
Synthetic Approach ◽  
Microwave Assisted ◽  
Theoretical Approaches ◽  
Nanoparticles Synthesis ◽  
First Time

<p>We report, for the first time, new insights into the nature of the band gap of <a>CuGeO<sub>3</sub> </a>(CGO) nanocrystals synthesized from a microwave-assisted hydrothermal method in the presence of citrate. To the best of our knowledge, this synthetic approach has the shortest reaction time and it works at the lowest temperatures reported in the literature for the preparation of these materials. The influence of the surfactant on the structural, electronic, optical, and photocatalytic properties of CGO nanocrystals is discussed by a combination of experimental and theoretical approaches, and that results elucidates the nature of the band gap of synthetized CGO nanocrystals. We believe that this particular strategy is one of the most critical parameters for the development of innovative applications and that result could shed some light on the emerging material design with entirely new properties.</p> <p><b> </b></p>

General Cyclopropane Assembly via Enantioselective Redox-Active Carbene Transfer to Aliphatic Olefins

2018 ◽  
Author(s):  
Marc Montesinos-Magraner ◽  
Matteo Costantini ◽  
Rodrigo Ramirez-Contreras ◽  
Michael E. Muratore ◽  
Magnus J. Johansson ◽  
...  
Keyword(s):  
Total Synthesis ◽  
Asymmetric Synthesis ◽  
Chemical Space ◽  
Synthetic Approach ◽  
Asymmetric Cyclopropanation ◽  
Redox Active ◽  
Wide Range ◽  
Leaving Group ◽  
Stereoelectronic Properties ◽  
Carbene Transfer

Asymmetric cyclopropane synthesis currently requires bespoke strategies, methods, substrates and reagents, even when targeting similar compounds. This limits the speed and chemical space available for discovery campaigns. Here we introduce a practical and versatile diazocompound, and we demonstrate its performance in the first unified asymmetric synthesis of functionalized cyclopropanes. We found that the redox-active leaving group in this reagent enhances the reactivity and selectivity of geminal carbene transfer. This effect enabled the asymmetric cyclopropanation of a wide range of olefins including unactivated aliphatic alkenes, enabling the 3-step total synthesis of (–)-dictyopterene A. This unified synthetic approach delivers high enantioselectivities that are independent of the stereoelectronic properties of the functional groups transferred. Our results demonstrate that orthogonally-differentiated diazocompounds are viable and advantageous equivalents of single-carbon chirons<i>.</i>

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