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.

Brønsted acid-catalyzed homogeneous O–H and S–H insertion reactions under metal- and ligand-free conditions

2021 ◽  
Author(s):  
Zhipeng Zhang ◽  
Zhiqin He ◽  
Yuxing Xie ◽  
Tiantong He ◽  
Yaofeng Fu ◽  
...  
Keyword(s):  
Diazo Compounds ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Insertion Reactions ◽  
Brönsted Acid ◽  
Ligand Free ◽  
Acid Catalyzed ◽  
Hydroxyl Compounds

The economical and accessible CF3SO3H successfully catalyzed homogeneous O–H and S–H bond insertion reactions between hydroxyl compounds, thiols and diazo compounds under metal- and ligand-free conditions.

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

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
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