scholarly journals An asymmetric Brønsted acid-catalyzed Friedel–Crafts reaction of indoles with cyclic N-sulfimines

RSC Advances ◽  
2017 ◽  
Vol 7 (54) ◽  
pp. 34283-34286 ◽  
Author(s):  
Sang Gyu Lee ◽  
Sung-Gon Kim
Keyword(s):  
Phosphoric Acid ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed

A highly enantioselective organocatalytic Friedel–Crafts reaction of indoles with cyclic N-sulfimines using a chiral phosphoric acid as an organocatalyst has been developed.

scholarly journals Synthesis of six-membered spirooxindolesviaa chiral Brønsted acid-catalyzed asymmetric intramolecular Friedel–Crafts reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (65) ◽  
pp. 37035-37039 ◽  
Author(s):  
Hui-Xuan Chen ◽  
Yaqi Zhang ◽  
Yuyang Zhang ◽  
Xuefeng He ◽  
Zhen-Wei Zhang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid

A chiral phosphoric acid-catalyzed asymmetric intramolecular Friedel–Crafts reaction for the synthesis of 3′,4′-dihydro-2′H-spiro[indoline-3,1′-pyrrolo[1,2-a]pyrazin]-2-ones.

scholarly journals Chiral Brønsted acid-catalyzed enantioselective Friedel–Crafts reaction of 2-methoxyfuran with aliphatic ketimines generated in situ

2016 ◽  
Vol 7 (2) ◽  
pp. 1057-1062 ◽  
Author(s):  
Azusa Kondoh ◽  
Yusuke Ota ◽  
Takazumi Komuro ◽  
Fuyuki Egawa ◽  
Kyohei Kanomata ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid

An enantioselective Friedel–Crafts reaction with aliphatic ketimines generated in situ from hemiaminal ethers afforded products with high enantioselectivity under the influence of a chiral phosphoric acid catalyst.

Chiral phosphoric acid-catalyzed direct asymmetric mannich reaction of cyclicC-acylimines with simple ketones: facile access to C2-quaternary indolin-3-ones

2018 ◽  
Vol 54 (66) ◽  
pp. 9151-9154 ◽  
Author(s):  
Jin-Shan Li ◽  
Yong-Jie Liu ◽  
Shen Li ◽  
Jun-An Ma
Keyword(s):  
Phosphoric Acid ◽  
Mannich Reaction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid

A chiral Brønsted acid-catalyzed direct asymmetric Mannich reaction of simple ketones with cyclicC-acylimines has been established for the synthesis of C2-quaternary indolin-3-ones.

Chiral Brønsted acid-catalyzed hydrophosphonylation of imines—DFT study on the effect of substituents of phosphoric acid

Tetrahedron ◽  
2009 ◽  
Vol 65 (26) ◽  
pp. 4950-4956 ◽  
Author(s):  
Takahiko Akiyama ◽  
Hisashi Morita ◽  
Prabhakar Bachu ◽  
Keiji Mori ◽  
Masahiro Yamanaka ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Dft Study ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Effect Of Substituents ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Chiral Bronsted Acid

Chiral Brønsted Acid from Chiral Phosphoric Acid Boron Complex and Water: Asymmetric Reduction of Indoles

2020 ◽  
Vol 132 (8) ◽  
pp. 3320-3325 ◽  
Author(s):  
Kai Yang ◽  
Yixian Lou ◽  
Chenglan Wang ◽  
Liang‐Wen Qi ◽  
Tongchang Fang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Asymmetric Reduction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Boron Complex ◽  
Chiral Bronsted Acid

Chiral Brønsted Acid from Chiral Phosphoric Acid Boron Complex and Water: Asymmetric Reduction of Indoles

2020 ◽  
Vol 59 (8) ◽  
pp. 3294-3299 ◽  
Author(s):  
Kai Yang ◽  
Yixian Lou ◽  
Chenglan Wang ◽  
Liang‐Wen Qi ◽  
Tongchang Fang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Asymmetric Reduction ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Boron Complex ◽  
Chiral Bronsted Acid

Brønsted Acid Catalyzed Cyclization of Inert N-Substituted Pyrroles to Benzo[f]pyrrolo[1,2-a][1,4]diazepines

Synlett ◽  
2021 ◽  
Author(s):  
Jinlong Zhang ◽  
Gaoxi Jiang ◽  
Zeng Gao ◽  
Jinlong Qian ◽  
Huameng Yang
Keyword(s):  
Ring Closure ◽  
Acid Catalysts ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Mild Conditions ◽  
Intermolecular Cyclization ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
High Yields

AbstractTwo approaches involving intramolecular and intermolecular cyclization, respectively, have been developed for the direct and practical construction of a series of important benzo[f]pyrrolo[1,2-a][1,4]azepines by using Brønsted acid catalysts. Upon catalysis by TsOH, the intramolecular dehydroxylation/ring closure of 3-hydroxy-2-[2-(1H-pyrrol-1-yl)benzyl]isoindolin-1-ones provided various racemic benzo[f]pyrrolo[1,2-a][1,4]azepines in high yields. Furthermore, enantioenriched benzo[f]pyrrolo[1,2-a][1,4]azepines were also obtained by chiral phosphoric acid catalyzed intermolecular addition of [2-(1H-pyrrol-1-yl)phenyl]methanamines to 2-formylbenzoates under mild conditions.

scholarly journals Reduction of Nitroarenes to Anilines with a Benzothiazoline: Application to Enantioselective Synthesis of 2-Arylquinoline Derivatives

Synlett ◽  
2018 ◽  
Vol 30 (04) ◽  
pp. 499-502 ◽  
Author(s):  
Masamichi Miyagawa ◽  
Ryota Yamamoto ◽  
Nanako Kobayashi ◽  
Takahiko Akiyama
Keyword(s):  
Phosphoric Acid ◽  
Enantioselective Synthesis ◽  
Hydrogen Donor ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Aniline Derivatives ◽  
Chiral Phosphoric Acid ◽  
Brönsted Acid ◽  
Short Time

The metal-free reduction of nitroarenes to aniline derivatives was accomplished in a short time by using a benzothiazoline as the hydrogen donor in combination with a Brønsted acid. An enantioselective synthesis of 2-arylquinolines was achieved by using 1-aryl-3-(2-nitrophenyl)propan-1-ones as starting materials and a combination of a benzothiazoline and a chiral phosphoric acid.

Synthetic Scope of Brønsted Acid-Catalyzed Reactions of Carbonyl Compounds and Ethyl Diazoacetate

2021 ◽  
Author(s):  
Mizzanoor Rahaman ◽  
M. Shahnawaz Ali ◽  
Khorshada Jahan ◽  
Damon Hinz ◽  
Jawad Bin Belayet ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Ethyl Diazoacetate ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
Catalyzed Reactions
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