Schiff-base molecules and COFs as metal-free catalysts or silver supports for carboxylation of alkynes with CO2

2021 ◽  
Author(s):  
Lin Zhang ◽  
Ran Bu ◽  
Xiao-yan Liu ◽  
Peng-fei Mu ◽  
En-Qing Gao
Keyword(s):  
Schiff Base ◽  
Transition Metal ◽  
Co2 Fixation ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Terminal Alkynes ◽  
Metal Free ◽  
Mild Conditions

Carboxylating terminal alkynes with CO2 to produce propiolic acids is an atom-economic and high-value route for CO2 fixation and utilization, but the conversion under mild conditions needs transition metal catalysts....

Transition-metal-free direct perfluoroalkylation of quinoline amides at C5 position through radical cross-coupling under mild conditions

2017 ◽  
Vol 4 (6) ◽  
pp. 1116-1120 ◽  
Author(s):  
Jun Xu ◽  
Li Qiao ◽  
Beibei Ying ◽  
Xiaolei Zhu ◽  
Chao Shen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Cross Coupling ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Low Energy ◽  
Metal Free ◽  
Mild Conditions

A simple low-energy and efficient method is established for the synthesis of C5-selective perfluoroalkylation quinolines in the absence of any transition metal catalysts.

scholarly journals One Pot and Metal-Free Approach to 3-(2-Hydroxybenzoyl)-1-aza-anthraquinones

Molecules ◽  
2019 ◽  
Vol 24 (16) ◽  
pp. 3017
Author(s):  
Jiaqi Yuan ◽  
Qian He ◽  
Shanshan Song ◽  
Xiaofei Zhang ◽  
Zehong Miao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Inert Gas ◽  
One Pot ◽  
Metal Free ◽  
Mild Conditions ◽  
Anthraquinone Derivatives

Herein, a direct strategy to synthesize 3-(2-hydroxybenzoyl)-1-aza-anthraquinones with excellent efficiency, mild conditions, and benign functional group compatibility was reported. A variety of 3-formylchromone compounds were employed as compatible substrates and this protocol gave the 3-(2-hydroxybenzoyl)-1-aza-anthraquinone derivatives in good to excellent yields without inert gas and expensive transition metal catalysts. Some compounds displayed good anti-proliferative activities.

Electrochemically promoted synthesis of polysubstituted oxazoles from β-diketone derivatives and benzylamines under mild conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (46) ◽  
pp. 24300-24303 ◽  
Author(s):  
Gaoqing Yuan ◽  
Zechen Zhu ◽  
Xiaofang Gao ◽  
Huanfeng Jiang
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Mild Conditions

An efficient electrochemical route has been developed to synthesize polysubstituted oxazoles, without the use of hazardous oxidants and transition metal catalysts.

scholarly journals Transition-Metal-Free [3+2] Dehydration Cycloaddition of Donor-Acceptor Cyclopropanes With 2-Naphthols

2021 ◽  
Vol 9 ◽  
Author(s):  
Hua Zhao ◽  
Peng Shen ◽  
Dongru Sun ◽  
Hongbin Zhai ◽  
Yufen Zhao
Keyword(s):  
Transition Metal ◽  
Ring Opening ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Cyclization Reaction ◽  
Metal Free ◽  
Efficient Access ◽  
Donor Acceptor ◽  
Acid Catalyzed ◽  
Synthetic Application

A Brønsted acid-catalyzed domino ring-opening cyclization transformation of donor-acceptor (D-A) cyclopropanes and 2-naphthols has been developed. This formal [3+2] cyclization reaction provided novel and efficient access to the naphthalene-fused cyclopentanes in the absence of any transition-metal catalysts or additives. This robust procedure was completed smoothly on a gram-scale to afford the corresponding product with comparable efficiency. Furthermore, the synthetic application of the prepared product has been demonstrated by its transformation into a variety of synthetically useful molecules.

Transition metal-free aroylation of NH-sulfoximines with methyl arenes

2015 ◽  
Vol 51 (80) ◽  
pp. 14889-14892 ◽  
Author(s):  
Ya Zou ◽  
Jing Xiao ◽  
Zhihong Peng ◽  
Wanrong Dong ◽  
Delie An
Keyword(s):  
Transition Metal ◽  
Organic Solvents ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Metal Free

An iodine-catalyzed N-aroylation of NH-sulfoximines with methyl arenes was herein demonstrated without participation of external organic solvents, transition metal-catalysts or ligands.

Recent advances in metal free- and late transition metal-catalysed hydroamination of unactivated alkenes

2015 ◽  
Vol 5 (4) ◽  
pp. 2017-2037 ◽  
Author(s):  
Elise Bernoud ◽  
Clément Lepori ◽  
Mohamed Mellah ◽  
Emmanuelle Schulz ◽  
Jérôme Hannedouche
Keyword(s):  
Transition Metal ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Late Transition Metal ◽  
Metal Free ◽  
Recent Advances ◽  
Late Transition

This Perspective article outlines some of the recent advancements in the development of (chiral) metal-free and late transition metal catalysts for hydroamination of unactivated alkenes.

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