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.

Facile Access to Triazole-Fused 3,1-Benzoxazines Enabled by Metal-Free Base-Promoted Intramolecular C–O Coupling

Synthesis ◽  
2021 ◽  
Author(s):  
Yury N. Kotovshchikov ◽  
Stepan S. Tatevosyan ◽  
Gennadij V. Latyshev ◽  
Nikolay V. Lukashev ◽  
Irina P. Beletskaya
Keyword(s):  
Transition Metal ◽  
Functional Group ◽  
Cost Effective ◽  
Reductive Cleavage ◽  
Effective Procedure ◽  
Free Base ◽  
Metal Free ◽  
Fused Heterocycles ◽  
Convenient Approach

AbstractA convenient approach to assemble 1,2,3-triazole-fused 4H-3,1-benzoxazines has been developed. Diverse alcohol-tethered 5-iodotriazoles, readily accessible by a modified protocol of Cu-catalyzed (3+2)-cycloaddition, were utilized as precursors of the target fused heterocycles. The intramolecular C–O coupling proceeded efficiently under base-mediated transition-metal-free conditions, furnishing cyclization products in yields up to 96%. Suppression of the competing reductive cleavage of the C–I bond was achieved by the use of Na2CO3 in acetonitrile at 100 °C. This practical and cost-effective procedure features a broad substrate scope and valuable functional group tolerance.

UV light-mediated difunctionalization of alkenes with CF3SO2Na: synthesis of trifluoromethyl phenanthrene and anthrone derivatives

2016 ◽  
Vol 14 (23) ◽  
pp. 5293-5297 ◽  
Author(s):  
Bing Li ◽  
Dan Fan ◽  
Chao Yang ◽  
Wujiong Xia
Keyword(s):  
Uv Light ◽  
Cost Effective ◽  
Metal Free

A metal-free and cost-effective protocol for UV light-mediated difunctionalization of alkenes with CF3SO2Na was developed.

Efficient hydrogen peroxide synthesis by metal-free polyterthiophene via photoelectrocatalytic dioxygen reduction

2020 ◽  
Vol 13 (1) ◽  
pp. 238-245 ◽  
Author(s):  
Wenjun Fan ◽  
Bingqing Zhang ◽  
Xiaoyu Wang ◽  
Weiguang Ma ◽  
Deng Li ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Cost Effective ◽  
High Concentration ◽  
Metal Free ◽  
Dioxygen Reduction ◽  
Polymeric Semiconductor ◽  
Hydrogen Peroxide Synthesis

We demonstrate the metal-free polymeric semiconductor pTTh as a selective and efficient photocathode for photoelectrochemical oxygen reduction to a high concentration of H2O2 in a cost-effective way.

Metal-free synthesis of ketones by visible-light induced aerobic oxidative radical addition of aryl hydrazines to alkenes

2017 ◽  
Vol 19 (13) ◽  
pp. 2941-2944 ◽  
Author(s):  
Ya Ding ◽  
Wenkai Zhang ◽  
Hao Li ◽  
Yunge Meng ◽  
Te Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Cost Effective ◽  
Radical Addition ◽  
Metal Free ◽  
Cost Effective Method

A green and cost-effective method has been developed for the conversion of alkenes to ketones under metal-free conditions.

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 annulative hydrosulfonation of propiolate esters: synthesis of 4-sulfonates of coumarins and butenolides

2020 ◽  
Vol 44 (10) ◽  
pp. 3970-3984
Author(s):  
Rodney A. Fernandes ◽  
Ashvin J. Gangani ◽  
Rupesh A. Kunkalkar
Keyword(s):  
Cost Effective ◽  
Sulfonic Acids ◽  
Metal Free ◽  
Cost Effective Method

An efficient metal-free and cost-effective method for the synthesis of coumarin and butenolide 4-sulfonates has been developed involving addition of sulfonic acids to ethyl propiolates followed by lactonization.

N,S co-doped hierarchically porous carbon materials for efficient metal-free catalysis

2020 ◽  
Vol 22 (3) ◽  
pp. 742-752 ◽  
Author(s):  
Xiwei Hu ◽  
Xun Sun ◽  
Qiang Song ◽  
Yangyang Zhu ◽  
Yu Long ◽  
...  
Keyword(s):  
Porous Structure ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Cost Effective ◽  
Hierarchically Porous ◽  
Metal Free ◽  
Porous Carbon Materials ◽  
Hierarchically Porous Structure ◽  
Co Doped

Polymer-derived N,S co-doped carbon materials (PDNSC-X) with a hierarchically porous structure were facilely prepared by a cost-effective and convenient strategy and were subsequently used as efficient metal-free catalysts.

scholarly journals Indoor Light Harvesting Dye-sensitized Solar Cells Surpassing 30% Efficiency without Co-sensitizers

2021 ◽  
Author(s):  
Reethu Haridas ◽  
Jayadev Jayadev ◽  
Sourava Chandra Pradhan ◽  
Vindhyasarumi Asarikal ◽  
Yoosaf Karuvath ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Cost Effective ◽  
Artificial Light ◽  
Metal Free ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Dye-sensitized solar cells (DSCs) are proved to be one among the best photovoltaic approach for harnessing indoor/artificial light. Herein, we report two new molecularly engineered cost-effective metal-free carbazole based D-π-A...

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