scholarly journals Asymmetric Synthesis of CF2-Aziridines Enabled by Combined Strong Brønsted Acid Catalysis

2020 ◽  
Author(s):  
Xing-Fa Tan ◽  
Fa-Guang Zhang ◽  
Jun-An Ma
Keyword(s):  
Asymmetric Synthesis ◽  
Multicomponent Reaction ◽  
Acid Catalysis ◽  
Optical Purity ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

A diastereo- and enantioselective approach to access chiral CF2-functionalized aziridines from phenylsulfone difluorodiazoethane (PhSO2CF2CHN2) and in-situ formed aldimines is described. This multicomponent reaction is enabled by a combined strong Brønsted acid catalytic platform consisting of a chiral disulfonimide and 2-carboxyphenylboronic acid. The optical purity of obtained CF2-aziridines could be further improved by a practical dissolution-filtration procedure.

scholarly journals Asymmetric synthesis of CF2-functionalized aziridines by combined strong Brønsted acid catalysis

2020 ◽  
Vol 16 ◽  
pp. 638-644
Author(s):  
Xing-Fa Tan ◽  
Fa-Guang Zhang ◽  
Jun-An Ma
Keyword(s):  
Asymmetric Synthesis ◽  
Multicomponent Reaction ◽  
Acid Catalysis ◽  
Optical Purity ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Phenyl Sulfone ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

A diastereo- and enantioselective approach to access chiral CF2-functionalized aziridines from difluorodiazoethyl phenyl sulfone (PhSO2CF2CHN2) and in situ-formed aldimines is described. This multicomponent reaction is enabled by a combined strong Brønsted acid catalytic platform consisting of a chiral disulfonimide and 2-carboxyphenylboronic acid. The optical purity of the obtained CF2-substituted aziridines could be further improved by a practical dissolution–filtration procedure.

Asymmetric Synthesis of 1,2-Diamines bearing Tetrasubstituted Centers from Nonstabilized Azomethine Ylides and N-Sulfinylketimines under Brønsted Acid Catalysis

2015 ◽  
Vol 18 (1) ◽  
pp. 92-95 ◽  
Author(s):  
Cristina Izquierdo ◽  
Francisco Esteban ◽  
José Luis García Ruano ◽  
Alberto Fraile ◽  
José Alemán
Keyword(s):  
Asymmetric Synthesis ◽  
Acid Catalysis ◽  
Azomethine Ylides ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Correction to “Asymmetric Synthesis of α-Amino Ketones by Brønsted Acid Catalysis”

2015 ◽  
Vol 17 (18) ◽  
pp. 4648-4648
Author(s):  
Wei Wen ◽  
Yu Zeng ◽  
Li-Yu Peng ◽  
Li−Na Fu ◽  
Qi-Xiang Guo
Keyword(s):  
Asymmetric Synthesis ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

scholarly journals An Asymmetric Synthesis of 1,2,4-Trioxane Anticancer Agents via Desymmetrization of Peroxyquinols through a Brønsted Acid Catalysis Cascade

2012 ◽  
Vol 134 (33) ◽  
pp. 13554-13557 ◽  
Author(s):  
David M. Rubush ◽  
Michelle A. Morges ◽  
Barbara J. Rose ◽  
Douglas H. Thamm ◽  
Tomislav Rovis
Keyword(s):  
Asymmetric Synthesis ◽  
Anticancer Agents ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Asymmetric Synthesis of α-Amino Ketones by Brønsted Acid Catalysis

2015 ◽  
Vol 17 (15) ◽  
pp. 3922-3925 ◽  
Author(s):  
Wei Wen ◽  
Yu Zeng ◽  
Li-Yu Peng ◽  
Li-Na Fu ◽  
Qi-Xiang Guo
Keyword(s):  
Asymmetric Synthesis ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Multicomponent reaction through cooperative trio catalysis incorporating enamine, Brønsted acid and metal Lewis acid catalysis: a concise route to access chromans

2017 ◽  
Vol 15 (23) ◽  
pp. 4933-4936 ◽  
Author(s):  
Chamini V. Karunaratne ◽  
Ryan G. Sarkisian ◽  
Jennifer Reeves ◽  
Yongming Deng ◽  
Kraig A. Wheeler ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Multicomponent Reaction ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Lewis Acid Catalysis ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Chroman formation is achieved through a tricatalytic system incorporating enamine, metal Lewis acid and Brønsted acid catalysis.

Practical catalytic enantioselective synthesis of 2,3-dihydroquin-azolinones by chiral brønsted acid catalysis

2021 ◽  
Author(s):  
Yongbiao Guo ◽  
Zhenhua Gao ◽  
Junchen Li ◽  
Xiaojing Bi ◽  
Enxue Shi ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Acid Catalysis ◽  
Enantioselective Synthesis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Chiral Bronsted Acid ◽  
Bronsted Acid Catalysis

An efficient, practical and scalable protocol to prepare chiral 2,3-dihydroquinazolinones was developed under catalysis of spirocyclic SPINOL-phosphoric acid.

Inhibition by Water during Heterogeneous Brønsted Acid Catalysis by Three-Dimensional Crystalline Organic Salts

2021 ◽  
Author(s):  
Alexander Gak ◽  
Svetlana Kuznetsova ◽  
Yulia Nelyubina ◽  
Alexander A. Korlyukov ◽  
Han Li ◽  
...  
Keyword(s):  
Acid Catalysis ◽  
Three Dimensional ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Organic Salts ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis
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