scholarly journals Metal-free synthesis of phosphinoylchroman-4-ones via a radical phosphinoylation–cyclization cascade mediated by K2S2O8

2020 ◽  
Vol 16 ◽  
pp. 1974-1982
Author(s):  
Qiang Liu ◽  
Weibang Lu ◽  
Guanqun Xie ◽  
Xiaoxia Wang
Keyword(s):  
Phosphine Oxide ◽  
Environmentally Benign ◽  
Metal Free

A variety of chroman-4-ones bearing phosphine oxide motifs were conveniently synthesized from readily available diphenylphosphine oxides and alkenyl aldehydes via a metal-free tandem phosphinoylation/cyclization protocol. The reaction utilizes K2S2O8 as oxidant and proceeds in DMSO/H2O at environmentally benign conditions with a broad substrate scope and afforded the title compounds in moderate yields.

scholarly journals Metal-free synthesis of phosphinoylchroman-4-ones via phosphinoylation/cyclization cascade mediated by K2S2O8

2020 ◽  
Author(s):  
Qiang Liu ◽  
Weibang Lu ◽  
Guanqun Xie ◽  
Xiaoxia Wang
Keyword(s):  
Phosphine Oxide ◽  
Environmentally Benign ◽  
Diphenylphosphine Oxide ◽  
Metal Free

A variety of chroman-4-ones bearing phosphine oxide motifs were conveniently synthesized from readily available diphenylphosphine oxide and alkenyl aldehydes via a metal-free tandem phosphinoylation/cyclization protocol. The reaction utilizes K2S2O8 as oxidant and proceeds in DMSO-H2O at environmentally benign conditions with broad substrate scope and afforded the title compounds in moderate yields.

Electrochemical Oxidative Cyclization of Alkenes, Boronic Acids, and Dichalcogenides to Access Chalcogenated Boronic Esters and 1,3-Diols

2021 ◽  
Author(s):  
Changfeng Huang ◽  
Jijing Hu ◽  
Guangxian Chen ◽  
Minjian Wu ◽  
Hua Cao ◽  
...  
Keyword(s):  
Boronic Acids ◽  
Oxidative Cyclization ◽  
Environmentally Benign ◽  
Allylic Alcohols ◽  
Efficient Manner ◽  
Metal Free ◽  
Boronic Esters

A sustainable, environmentally benign electrochemical oxidative three-component cyclization of allylic alcohols, boronic acids, and dichalcogenides under metal-free and oxidant-free conditions has been developed, which provides an efficient manner for the...

scholarly journals Nitrosonium ion catalysis: aerobic, metal-free cross-dehydrogenative carbon–heteroatom bond formation

2018 ◽  
Vol 54 (92) ◽  
pp. 13022-13025 ◽  
Author(s):  
Luis Bering ◽  
Laura D’Ottavio ◽  
Giedre Sirvinskaite ◽  
Andrey P. Antonchick
Keyword(s):  
Bond Formation ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
Metal Free ◽  
Dehydrogenative Coupling ◽  
Nitrosonium Ion

Catalytic cross-dehydrogenative coupling of heteroarenes with thiophenols and phenothiazines has been developed under mild and environmentally benign reaction conditions.

A practical protocol for the synthesis of bibenzyls via C(sp3)–H activation of methyl arenes under metal-free conditions

2017 ◽  
Vol 4 (1) ◽  
pp. 147-150 ◽  
Author(s):  
Promod Kumar ◽  
Tirumaleswararao Guntreddi ◽  
Rahul Singh ◽  
Krishna Nand Singh
Keyword(s):  
Environmentally Benign ◽  
Atom Economy ◽  
Metal Free

A variety of bibenzyl derivatives have been synthesized with excellent atom economy via C(sp3)–H–C(sp3)–H coupling of readily available methyl arenes using K2S2O8 under metal-free and environmentally benign conditions.

Base- and metal-free decarboxylative aldol reaction of β-ketoacids with glyoxylate hydrates and glyoxal monohydrates in water

2016 ◽  
Vol 18 (24) ◽  
pp. 6609-6617 ◽  
Author(s):  
Nan Ren ◽  
Jing Nie ◽  
Jun-An Ma
Keyword(s):  
Aldol Reaction ◽  
Environmentally Benign ◽  
Metal Free

An environmentally benign decarboxylative aldol reaction of β-ketoacids with glyoxylate and glyoxal monohydrates in water is reported.

Metal-Free Phosphine Oxide Reductions Catalyzed by B(C6F5)3 and Electrophilic Fluorophosphonium Cations

2016 ◽  
Vol 35 (7) ◽  
pp. 1030-1035 ◽  
Author(s):  
Meera Mehta ◽  
Isaac Garcia de la Arada ◽  
Manuel Perez ◽  
Digvijay Porwal ◽  
Martin Oestreich ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Metal Free

Transition-metal-free and organic solvent-free conversion of N-substituted 2-aminobiaryls into corresponding carbazoles via intramolecular oxidative radical cyclization induced by peroxodisulfate

2017 ◽  
Vol 19 (24) ◽  
pp. 5854-5861 ◽  
Author(s):  
Palani Natarajan ◽  
Priya Priya ◽  
Deachen Chuskit
Keyword(s):  
Transition Metal ◽  
Organic Solvent ◽  
Radical Cyclization ◽  
Solvent Free ◽  
Environmentally Benign ◽  
Metal Free ◽  
Benign Synthesis ◽  
Oxidative Radical Cyclization

An atom-economical and environmentally benign synthesis of N-substituted carbazoles is described. This methodology afforded products in 90–120 minutes.

scholarly journals Metal-free oxidative coupling of arylmethylamines with indoles: a simple, environmentally benign approach for the synthesis of 3,3′-bis(indolyl)methanes

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23254-23262
Author(s):  
Vikas D. Kadu ◽  
Sankala Naga Chandrudu ◽  
Mahesh G. Hublikar ◽  
Dattatraya G. Raut ◽  
Raghunath B. Bhosale
Keyword(s):  
Molecular Oxygen ◽  
Oxidative Coupling ◽  
Environmentally Benign ◽  
Metal Free

The efficient metal-free oxidative coupling of arylmethylamines with indoles has been developed using molecular oxygen as a green oxidant towards a novel rout of 3,3′-bis(indolyl)methanes (BIMs) synthesis.

scholarly journals Environmentally Benign Metal-Free Reduction of GO Using Molecular Hydrogen: A Mechanistic Insight

ACS Omega ◽  
2018 ◽  
Vol 3 (11) ◽  
pp. 15112-15118
Author(s):  
Ritu Rai ◽  
Zubair Ahmed ◽  
Rajinder Kumar ◽  
Rameshwar L. Kumawat ◽  
Kalyani Chordiya ◽  
...  
Keyword(s):  
Molecular Hydrogen ◽  
Environmentally Benign ◽  
Metal Free ◽  
Mechanistic Insight
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