Direct construction of 2,3-unsubstituted benzofurans and benzothiophenes via a metal-free catalyzed intramolecular Friedel–Crafts reaction

2019 ◽  
Vol 6 (4) ◽  
pp. 493-497
Author(s):  
Weimin Ma ◽  
Jiawei Huang ◽  
Xianyu Huang ◽  
Shulin Meng ◽  
Zhengwei Yang ◽  
...  
Keyword(s):  
Direct Construction ◽  
Metal Free ◽  
Straightforward Method ◽  
Highly Effective

A highly effective and straightforward method for the construction of 2,3-unsubstituted benzofurans and benzothiophenes has been developed.

Metal-free direct construction of sulfenylated pyrazoles via the NaOH promoted sulfenylation of pyrazolones with aryl thiols

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51830-51833 ◽  
Author(s):  
Xiaoxia Liu ◽  
Huanhuan Cui ◽  
Daoshan Yang ◽  
Shicui Dai ◽  
Tiantian Zhang ◽  
...  
Keyword(s):  
Cost Effective ◽  
Direct Construction ◽  
Metal Free

A convenient and cost-effective NaOH-promoted direct sulfenylation of pyrazolones with aryl thiols has been developed under mild and metal-free conditions.

Metal-free intermolecular cyclopropanation between alkenes and iodonium ylides mediated by PhI(OAc)2·Bu4NI

2017 ◽  
Vol 53 (64) ◽  
pp. 9004-9007 ◽  
Author(s):  
Jason Tao ◽  
Carl D. Estrada ◽  
Graham K. Murphy
Keyword(s):  
Metal Free ◽  
Intermolecular Reaction ◽  
Highly Effective ◽  
Effective Synthesis ◽  
Iodonium Ylides ◽  
Substituted Cyclopropanes

A simple and highly effective synthesis of poly substituted cyclopropanes was developed. This metal-free intermolecular reaction between iodonium ylides and alkenes is mediated by PhI(OAc)2 and Bu4NI.

Porous organic polymers as metal free heterogeneous organocatalysts

2021 ◽  
Author(s):  
Maarten Debruyne ◽  
Veronique Van Speybroeck ◽  
Pascal Van Der Voort ◽  
Christian V. Stevens
Keyword(s):  
Green Chemistry ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Metal Free ◽  
Highly Effective ◽  
Catalytic Applications

Efficient catalysis is essential from a green chemistry perspective. Porous organic polymers (POPs) have recently emerged as highly effective materials for catalytic applications. POPs possess controllable compositions and functionalities, high...

ChemInform Abstract: Metal-Free Direct Construction of Sulfonamides via Iodine-Mediated Coupling Reaction of Sodium Sulfinates and Amines at Room Temperature.

ChemInform ◽  
2015 ◽  
Vol 46 (30) ◽  
pp. no-no
Author(s):  
Wei Wei ◽  
ChunLi Liu ◽  
Daoshan Yang ◽  
Jiangwei Wen ◽  
Jinmao You ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coupling Reaction ◽  
Direct Construction ◽  
Metal Free

Transition-metal-free catalyzed [3+2] cycloadditions/oxidative aromatization reactions for the synthesis of annulated indolizines

2019 ◽  
Vol 43 (43) ◽  
pp. 17000-17003 ◽  
Author(s):  
Qianwei Zhang ◽  
Bin Wang ◽  
Huifang Ma ◽  
Keyume Ablajan
Keyword(s):  
Transition Metal ◽  
Direct Construction ◽  
Metal Free ◽  
Oxidative Aromatization

A transition-metal-free catalyzed [3+2] cycloadditions/oxidative aromatization three-component reactions for direct construction of annulated indolizines was reported.

Metal-free synthesis of 2,2-disubstituted indolin-3-ones

2019 ◽  
Vol 17 (8) ◽  
pp. 2199-2203 ◽  
Author(s):  
Xinpeng Jiang ◽  
Bingbin Zhu ◽  
Kai Lin ◽  
Guan Wang ◽  
Wei-Ke Su ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Metal Catalyst ◽  
Facile Synthesis ◽  
Metal Free ◽  
Cross Coupling Reaction ◽  
Straightforward Method

A straightforward method for the synthesis of indolin-3-ones bearing a C2-quaternary functionality is reported. This cross-coupling reaction allows the facile synthesis of a series of 2,2-disubstituted indolin-3-ones in the absence of a metal catalyst in up to 94% yields.

Mesoporous carbon black as a metal-free electrocatalyst for highly effective determination of chromium(VI)

2017 ◽  
Vol 803 ◽  
pp. 58-64 ◽  
Author(s):  
Dandan Liu ◽  
Lifei Ji ◽  
Yu Ding ◽  
Xianjun Weng ◽  
Fengchun Yang ◽  
...  
Keyword(s):  
Carbon Black ◽  
Mesoporous Carbon ◽  
Metal Free ◽  
Chromium Vi ◽  
Highly Effective

ChemInform Abstract: Metal-Free Direct Construction of Sulfenylated Pyrazoles via the NaOH Promoted Sulfenylation of Pyrazolones with Aryl Thiols.

ChemInform ◽  
2016 ◽  
Vol 47 (41) ◽  
Author(s):  
Xiaoxia Liu ◽  
Huanhuan Cui ◽  
Daoshan Yang ◽  
Shicui Dai ◽  
Tiantian Zhang ◽  
...  
Keyword(s):  
Direct Construction ◽  
Metal Free

scholarly journals Metal-free atom transfer radical polymerization with ppm catalyst loading under sunlight

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiang Ma ◽  
Jinshuai Song ◽  
Xun Zhang ◽  
Yu Jiang ◽  
Li Ji ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Catalyst Design ◽  
Polymer Materials ◽  
Catalyst Loading ◽  
Atom Transfer ◽  
Controlled Polymerization ◽  
Heteroatom Doping ◽  
Metal Free ◽  
Highly Effective

AbstractOrganocatalytic atom transfer radical polymerization (O-ATRP) is recently emerging as an appealing method for the synthesis of metal-free polymer materials with well-defined microstructures and architectures. However, the development of highly effective catalysts that can be employed at a practical low loading are still a challenging task. Herein, we introduce a catalyst design logic based on heteroatom-doping of polycyclic arenes, which leads to the discovery of oxygen-doped anthanthrene (ODA) as highly effective organic photoredox catalysts for O-ATRP. In comparison with known organocatalysts, ODAs feature strong visible-light absorption together with high molar extinction coefficient (ε455nm up to 23,950 M–1 cm–1), which allow for the establishment of a controlled polymerization under sunlight at low ppm levels of catalyst loading.

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