Lewis Base Assisted Brønsted Base Catalysis: Direct Regioselective Asymmetric Vinylogous Alkylation of Allylic Sulfones

2011 ◽  
Vol 17 (34) ◽  
pp. 9489-9493 ◽  
Author(s):  
Lin Jiang ◽  
Qian Lei ◽  
Xin Huang ◽  
Hai-Lei Cui ◽  
Xue Zhou ◽  
...  
Keyword(s):  
Lewis Base ◽  
Base Catalysis ◽  
Brønsted Base

Lewis Base Assisted Brønsted Base Catalysis: Bidentate Phosphine Oxides as Activators and Modulators of Brønsted Basic Lanthanum-Aryloxides

2008 ◽  
Vol 47 (47) ◽  
pp. 9125-9129 ◽  
Author(s):  
Hiroyuki Morimoto ◽  
Tatsuhiko Yoshino ◽  
Takafumi Yukawa ◽  
Gang Lu ◽  
Shigeki Matsunaga ◽  
...  
Keyword(s):  
Lewis Base ◽  
Base Catalysis ◽  
Phosphine Oxides ◽  
Bidentate Phosphine ◽  
Brønsted Base

Lewis Base Assisted Brønsted Base Catalysis: Bidentate Phosphine Oxides as Activators and Modulators of Brønsted Basic Lanthanum-Aryloxides

2008 ◽  
Vol 120 (47) ◽  
pp. 9265-9269 ◽  
Author(s):  
Hiroyuki Morimoto ◽  
Tatsuhiko Yoshino ◽  
Takafumi Yukawa ◽  
Gang Lu ◽  
Shigeki Matsunaga ◽  
...  
Keyword(s):  
Lewis Base ◽  
Base Catalysis ◽  
Phosphine Oxides ◽  
Bidentate Phosphine ◽  
Brønsted Base

Organocatalytic Group Transfer Reactions with Hypervalent Iodine­ Reagents

Synthesis ◽  
2018 ◽  
Vol 51 (02) ◽  
pp. 359-370 ◽  
Author(s):  
Marcin Kalek ◽  
Manoj Ghosh ◽  
Adam Rajkiewicz
Keyword(s):  
Short Review ◽  
Lewis Base ◽  
Base Catalysis ◽  
Synthetic Methods ◽  
Hypervalent Iodine ◽  
Group Transfer ◽  
Iodine Compounds ◽  
Amine Catalysis ◽  
Brønsted Base ◽  
Brønsted And Lewis Acid

In recent years, a plethora of synthetic methods that employ hypervalent iodine compounds donating an atom or a group of atoms to an acceptor molecule have been developed. Several of these transformations utilize organocatalysis, which complements well the economic and environmental advantages offered by iodine reagents. This short review provides a systematic survey of the organocatalytic approaches that have been used to promote group transfer from hypervalent iodine species. It covers both the reactions in which an organocatalyst is applied to activate the acceptor, as well as those that exploit the organocatalytic activation of the hypervalent iodine reagent itself.1 Introduction2 Organocatalytic Activation of Acceptor2.1 Amine Catalysis via Enamine and Unsaturated Iminium Formation2.2 NHC Catalysis via Acyl Anion Equivalent and Enolate Formation2.3 Chiral Cation Directed Catalysis and Brønsted Base Catalysis via Pairing with Stabilized Enolates3 Organocatalytic Activation of Hypervalent Iodine Reagent3.1 Brønsted and Lewis Acid Catalysis3.2 Lewis Base Catalysis3.3 Radical Reactions with Organic Promoters and Catalysts4 Summary and Outlook

Lewis Base Assisted Brønsted Base Catalysis: Direct Asymmetric Allylic Alkylation of Indenes

2011 ◽  
Vol 2011 (36) ◽  
pp. 7366-7371 ◽  
Author(s):  
Hai-Lei Cui ◽  
Xun-Hao Sun ◽  
Lin Jiang ◽  
Lin Dong ◽  
Ying-Chun Chen
Keyword(s):  
Lewis Base ◽  
Base Catalysis ◽  
Allylic Alkylation ◽  
Asymmetric Allylic Alkylation ◽  
Brønsted Base

scholarly journals Dual metal and Lewis base catalysis approach for asymmetric synthesis of dihydroquinolines and the α-arylation of aldehydes via N-acyliminium ions

2015 ◽  
Vol 51 (87) ◽  
pp. 15788-15791 ◽  
Author(s):  
Chandra M. R. Volla ◽  
Eleonora Fava ◽  
Iuliana Atodiresei ◽  
Magnus Rueping
Keyword(s):  
Asymmetric Synthesis ◽  
Catalytic System ◽  
Optically Active ◽  
Lewis Base ◽  
Base Catalysis ◽  
Asymmetric Addition ◽  
Acyliminium Ions ◽  
Indium Triflate ◽  
Dual Metal

A dual catalytic system consisting of indium triflate and a chiral imidazolidinone catalyzes the asymmetric addition of aldehydes to N-acyl quinoliniums furnishing optically active dihydroquinolines in good yields and excellent selectivities.

Diastereodivergent synthesis of fully disubstituted spiro[indoline-3,2′-pyrrolidin]-2-ones via tuneable Lewis base/Brønsted base-promoted (3 + 2) cycloadditions

2021 ◽  
Author(s):  
Ke Li ◽  
Zhipeng Zhang ◽  
Jiahui Zhu ◽  
Yuxin Wang ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Lewis Base ◽  
Brønsted Base

We have developed unique base-promoted diastereoselective (3 + 2) cycloadditions. A diastereodivergent synthesis of fully disubstituted spiro[indoline-3,2′-pyrrolidin]-2-ones was realized by tuning a Lewis base/Brønsted base.

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