scholarly journals Brønsted acid-promoted thiazole synthesis under metal-free conditions using sulfur powder as the sulfur source

RSC Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 3931-3935 ◽  
Author(s):  
Penghui Ni ◽  
Jing Tan ◽  
Rong Li ◽  
Huawen Huang ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Sulfur Source ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Sulfur Powder ◽  
Metal Free ◽  
Brönsted Acid

A Brønsted acid-promoted protocol for the synthesis of 2,4-disubstituted thiazoles from benzylamines, acetophenones, and sulfur powder under metal-free conditions is described.

Brønsted Acid-Catalyzed Solvent-Controlled Regioselective Hydrothiolation and Diastereoselective Cascade Cyclization of Dienes

2021 ◽  
Author(s):  
Kai Ji ◽  
Ka Lu ◽  
Jie Huang ◽  
Zi-Hao Li ◽  
Tong-Mei Ding ◽  
...  
Keyword(s):  
Free Atom ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Cascade Cyclization ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
First Time

A highly regio- and diastereo-selective Brønsted acid-catalyzed tandem hydrothiolation/Friedel-Crafts reaction of linear 1,3-dienes has been developed for the first time, which provides a metal-free, atom-economic and concise way of constructing...

scholarly journals Brønsted acid-catalyzed metal-free one-pot synthesis of benzimidazoles via [4+1] heteroannulation of ortho-phenylenediamines with β-oxodithioesters

ARKIVOC ◽  
2017 ◽  
Vol 2018 (2) ◽  
pp. 81-89
Author(s):  
Abhijeet Srivastava ◽  
Gaurav Shukla ◽  
Dhananjay Yadav ◽  
Maya Shankar Singh
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
One Pot ◽  
Metal Free ◽  
One Pot Synthesis ◽  
Brönsted Acid ◽  
Acid Catalyzed

Organic Photoredox Catalytic α-C(sp3)–H Phosphorylation of Saturated Aza-Heterocycles

2021 ◽  
Author(s):  
Ming-Jun Yi ◽  
Teng-Fei Xiao ◽  
Wen-Hui Li ◽  
Yi-Fan Zhang ◽  
Pen-Ji Yan ◽  
...  
Keyword(s):  
Acid Catalysis ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Mild Conditions ◽  
Brönsted Acid ◽  
Bronsted Acid Catalysis

A metal-free C(sp3)–H phosphorylation of saturated aza-heterocycles via the merger of organic photoredox and Brønsted acid catalysis was established under mild conditions. This protocol provided a straightforward and economic access...

Metal-Free, Brønsted Acid-Catalyzed Formal [3+2] Annulation of Quinone Monoacetals with 2-Naphthols

2017 ◽  
Vol 82 (20) ◽  
pp. 11269-11274 ◽  
Author(s):  
Anu Jacob ◽  
Tony Roy ◽  
Trinadh Kaicharla ◽  
Akkattu T. Biju
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid ◽  
Acid Catalyzed

Silica-supported HClO4 promotes catalytic solvent- and metal-free O–H insertion reactions with diazo compounds

2018 ◽  
Vol 20 (19) ◽  
pp. 4547-4556 ◽  
Author(s):  
Rafael Douglas C. Gallo ◽  
Antonio C. B. Burtoloso
Keyword(s):  
Diazo Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Insertion Reactions ◽  
Metal Free ◽  
Brönsted Acid

An eco-friendly and metal-free protocol to perform O–H insertion reactions, using only 0.3 mol% of a recyclable silica-immobilized BrØnsted acid is described.

Metal-Free Brønsted Acid Catalyzed Formal [3 + 3] Annulation. Straightforward Synthesis of Dihydro-2H-Chromenones, Pyranones, and Tetrahydroquinolinones

2009 ◽  
Vol 74 (23) ◽  
pp. 8963-8973 ◽  
Author(s):  
Julie Moreau ◽  
Claudie Hubert ◽  
Jessika Batany ◽  
Loic Toupet ◽  
Thierry Roisnel ◽  
...  
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid ◽  
Acid Catalyzed

Brønsted acid-catalysed intramolecular ring opening of 2-(aryloxymethyl)-3-aryloxiranes leading to trans-4-arylchroman-3-ols: scope and limitations

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 39692-39696 ◽  
Author(s):  
Runjun Devi ◽  
Tapasi Kalita ◽  
Sajal Kumar Das
Keyword(s):  
Ring Opening ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid ◽  
Intramolecular Ring

A simple and metal-free method for the synthesis of a series oftrans-4-arylchroman-3-olsviaBrønsted acid-catalysed stereoselective intramolecular Friedel–Crafts alkylation of electron-rich arenes by tethered epoxides is developed.

Graphene-like boron nitride anchored Brönsted acid ionic liquids as metal-free catalyst for advanced oxidation process

2017 ◽  
Vol 436 ◽  
pp. 53-59 ◽  
Author(s):  
Peiwen Wu ◽  
Bilian Dai ◽  
Yanhong Chao ◽  
Yingcheng Wu ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Boron Nitride ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Brönsted Acid
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