scholarly journals Brønsted acid catalysis – the effect of 3,3′-substituents on the structural space and the stabilization of imine/phosphoric acid complexes

2019 ◽  
Vol 10 (20) ◽  
pp. 5226-5234 ◽  
Author(s):  
Maxime Melikian ◽  
Johannes Gramüller ◽  
Johnny Hioe ◽  
Julian Greindl ◽  
Ruth M. Gschwind
Keyword(s):  
Phosphoric Acid ◽  
Acid Catalysis ◽  
Theoretical Studies ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Structural Space ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Advanced NMR and theoretical studies reveal detailed insights into monomeric and dimeric structures plus deviating experimental and theoretical E/Z-populations.

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.

scholarly journals Brønsted Acid Catalysis—Structural Preferences and Mobility in Imine/Phosphoric Acid Complexes

2016 ◽  
Vol 138 (49) ◽  
pp. 15965-15971 ◽  
Author(s):  
Julian Greindl ◽  
Johnny Hioe ◽  
Nils Sorgenfrei ◽  
Fabio Morana ◽  
Ruth M. Gschwind
Keyword(s):  
Phosphoric Acid ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Structural Preferences ◽  
Bronsted Acid Catalysis

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

scholarly journals New opportunities in the stereoselective dearomatization of indoles

2016 ◽  
Vol 88 (3) ◽  
pp. 207-214 ◽  
Author(s):  
Elisabetta Manoni ◽  
Assunta De Nisi ◽  
Marco Bandini
Keyword(s):  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Reaction Conditions ◽  
Brönsted Acid ◽  
High Yields ◽  
First Time ◽  
Tailored Design ◽  
Bronsted Acid Catalysis

AbstractThe regio- and stereoselective dearomatization of indoles is realized for the first time by combining readily available indolyl precursors and electron-rich allenes, namely allenamides and aryloxyallenes. Inter- as well as intramolecular condensations were realized under gold and Brønsted acid catalysis providing a range of densely functionalized indoline and indolenine cores in high yields and excellent stereochemical outcome. Chemodivergent reaction profiles (Micheal-type addition vs. [2+2]-cycloaddition) were realized by a tailored design of both reaction conditions and functionalization of the reaction partners.

Brønsted acid-catalyzed 1,2-fluorine migration with fluoroepoxides

2015 ◽  
Vol 44 (45) ◽  
pp. 19636-19641 ◽  
Author(s):  
Tao Luo ◽  
Rui Zhang ◽  
Xiao Shen ◽  
Wei Zhang ◽  
Chuanfa Ni ◽  
...  
Keyword(s):  
Fluorine Atom ◽  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Atom Economy ◽  
Mild Conditions ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Bronsted Acid Catalysis

An efficient 1,2-fluorine migration reaction was realized under Brønsted acid catalysis in the absence of an external fluorinating source. The high fluorine atom economy and very mild conditions make this reaction a promising protocol for the construction of the C–F bond.

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