Metal-free catalytic cascade to chromones: direct coupling of salicylaldehydes and activated alkynes triggered by aryloxyl radicals

RSC Advances ◽  
2015 ◽  
Vol 5 (129) ◽  
pp. 106350-106354 ◽  
Author(s):  
Ping Wang ◽  
Zhongfeng Li ◽  
Shengli Cao ◽  
Honghua Rao
Keyword(s):  
Addition Reaction ◽  
Direct Coupling ◽  
Metal Free ◽  
Internal Alkynes ◽  
One Step ◽  
Activated Alkynes

The first intermolecular addition reaction of aryloxyl radicals to CC bonds was disclosed, which can afford biologically important chromonsviaa PhNMe3I-catalyzed direct coupling of salicylaldehydes and activated internal alkynes in only one step.

One-step Synthesis of Amorphous Nickel Iron Phosphide Hierarchical Nanostructures for Water Electrolysis with Superb Stability at High Current Density

2021 ◽  
Author(s):  
Yuefeng Yu ◽  
Xun He ◽  
Rong Li ◽  
Xinglong Gou
Keyword(s):  
High Performance ◽  
High Current Density ◽  
Water Electrolysis ◽  
Bifunctional Catalysts ◽  
High Current ◽  
Hierarchical Nanostructures ◽  
Iron Phosphide ◽  
Nickel Iron ◽  
Metal Free ◽  
One Step

Development of noble-metal-free high-performance bifunctional catalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is essential but challenging for hydrogen production from water electrolysis. Herein, amorphous bimetallic...

K2S2O8-mediated metal-free direct P–H/C–H functionalization: a convenient route to benzo[b]phosphole oxides from unactivated alkynes

2016 ◽  
Vol 18 (12) ◽  
pp. 3522-3526 ◽  
Author(s):  
Dumei Ma ◽  
Weizhu Chen ◽  
Gaobo Hu ◽  
Yun Zhang ◽  
Yuxing Gao ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Radical Addition ◽  
Metal Free ◽  
Internal Alkynes ◽  
Convenient Route

A metal-free and K2S2O8-mediated radical addition/cyclization of internal alkynes leading to benzo[b]phosphole oxides was developed, which eliminates residual heavy metal contamination in the product.

A Metal-free and β-Stereoselective Synthesis of 2-Deoxy-C-aryl Glycosides: Synthesis of 5-aza analogues of Aquayamycin

Synlett ◽  
2021 ◽  
Author(s):  
Yuling Mei ◽  
nan jiang ◽  
Yu Yang ◽  
Wan Zhang ◽  
Saifeng Qiu ◽  
...  
Keyword(s):  
Stereoselective Synthesis ◽  
Metal Free ◽  
Wide Range ◽  
One Step ◽  
Aryl Glycosides ◽  
Aryl Glycoside

A convenient protocol for β-stereoselective synthesis of 2-deoxy-C-aryl glycosides has been developed. This reaction takes place in one step by using I2/Et3SiH to activate glycosyl acetate to generate glycosyl iodide intermediate in situ, which was captured by naphthol followed by Fries-like O- → C-glycoside rearrangement to selectively afford β-C-aryl glycoside. The approach is applicable to a wide range of naphthol modules, and its utility was demonstrated in the synthesis of 5-aza analogues of Aquayamycin.

Visible light promoted coupling of alkynyl bromides and Hantzsch esters for the synthesis of internal alkynes

2019 ◽  
Vol 17 (1) ◽  
pp. 181-185 ◽  
Author(s):  
Zhi-Yong Song ◽  
Chun-Lin Zhang ◽  
Song Ye
Keyword(s):  
Visible Light ◽  
Metal Free ◽  
Internal Alkynes

A metal-free visible light promoted synthesis of internal alkynes was developed via the C(sp3)–C(sp) coupling of alkynyl bromides and Hantzsch esters.

scholarly journals Star-shaped triarylamines – One-step metal-free synthesis and optoelectronic properties

2019 ◽  
Vol 256 ◽  
pp. 116138 ◽  
Author(s):  
Alessandra Meli ◽  
Bernd Ebenhoch ◽  
Ksenia Kutonova ◽  
Angela Bihlmeier ◽  
Alexander Feyrer ◽  
...  
Keyword(s):  
Optoelectronic Properties ◽  
Metal Free ◽  
One Step

One-Step and Metal-Free Synthesis of Triblock Quaterpolymers by Concurrent and Switchable Polymerization

2020 ◽  
Vol 9 (2) ◽  
pp. 204-209 ◽  
Author(s):  
Shuaishuai Zhu ◽  
Yajun Zhao ◽  
Mingli Ni ◽  
Jing Xu ◽  
Xingping Zhou ◽  
...  
Keyword(s):  
Metal Free ◽  
One Step
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