Synthesis of polymer-supported Brønsted acid-functionalized Zn–porphyrin complex, knotted with benzimidazolium moiety for photodegradation of azo dyes under visible-light irradiation

2019 ◽  
Vol 46 (1) ◽  
pp. 783-802 ◽  
Author(s):  
Vijay B. Khajone ◽  
Pundlik R. Bhagat
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Azo Dyes ◽  
Light Irradiation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Porphyrin Complex ◽  
Brönsted Acid ◽  
Polymer Supported

An uncommon use of irradiated flavins: Brønsted acid catalysis

2020 ◽  
Vol 56 (42) ◽  
pp. 5661-5664
Author(s):  
Yukihiro Arakawa ◽  
Tomohiro Mihara ◽  
Hiroki Fujii ◽  
Keiji Minagawa ◽  
Yasushi Imada
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Acid Catalysis ◽  
Light Irradiation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Mild Conditions ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

Visible light irradiation to flavins in the presence of thiols and O2 provides Brønsted acidic species that can be used as efficient catalysts for thioacetalizations and for Mannich-type reactions under non-irradiation and mild conditions.

Brønsted acid cocatalysis in photocatalytic intramolecular coupling of tertiary amines: efficient synthesis of 2-arylindols

2016 ◽  
Vol 14 (31) ◽  
pp. 7447-7450 ◽  
Author(s):  
Xiaoqian Yuan ◽  
Xinxin Wu ◽  
Shupeng Dong ◽  
Guibing Wu ◽  
Jinxing Ye
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Bronsted Acid ◽  
Tertiary Amines ◽  
Brønsted Acid ◽  
Efficient Synthesis ◽  
Unsaturated Ketones ◽  
Brönsted Acid

We report herein a highly efficient intramolecular coupling reaction of tertiary amines and ketones (α,β-unsaturated ketones) by using a Brønsted acid as a cocatalyst, affording 2-arylindols in good to excellent yields (up to 92%) under visible light irradiation at room temperature.

Selective dehydration of sorbitol to 1,4-anhydro-d-sorbitol catalyzed by a polymer-supported acid catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28233-28241 ◽  
Author(s):  
Yuhe Xiu ◽  
Angjun Chen ◽  
Xuerui Liu ◽  
Chen Chen ◽  
Jizhong Chen ◽  
...  
Keyword(s):  
Acid Catalyst ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid ◽  
Polymer Supported

Novel polymer-supported Brønsted acid polymer catalysts have been employed for highly selective dehydration of sorbitol to 1,4-anhydro-D-sorbitol.

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