Iodine-promoted radical alkyl sulfuration of imidazopyridines with dialkyl azo compounds and elemental sulfur

2019 ◽  
Vol 17 (8) ◽  
pp. 2279-2286 ◽  
Author(s):  
Yong-Chao Gao ◽  
Zhuo-Bin Huang ◽  
Li Xu ◽  
Zhao-Dong Li ◽  
Zhi-Sheng Lai ◽  
...  
Keyword(s):  
Alkyl Radical ◽  
Elemental Sulfur ◽  
Azo Compounds ◽  
Metal Free

Dialkyl azo compounds were found to be effective alkyl radical sources for direct alkyl sulfuration with imidazopyridines using elemental sulfur under metal-free conditions.

scholarly journals Metal-free direct thiocarbamation of imidazopyridines with carbamoyl chloride and elemental sulfur

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54013-54016 ◽  
Author(s):  
Jian-Chao Deng ◽  
Shi-Bin Zhuang ◽  
Quan-Zhu Liu ◽  
Zi-Wei Lin ◽  
Yu-Liang Su ◽  
...  
Keyword(s):  
Elemental Sulfur ◽  
Metal Free

Metal-free direct thiocarbamation of imidazopyridines using elemental sulfur.

Metal-Free Dehydrogenative Double C–H Sulfuration To Access Thieno[2,3-b]indoles Using Elemental Sulfur

2019 ◽  
Vol 84 (20) ◽  
pp. 12946-12959 ◽  
Author(s):  
Jianming Liu ◽  
Yanyan Zhang ◽  
Yuanyuan Yue ◽  
Zhixian Wang ◽  
Huibin Shao ◽  
...  
Keyword(s):  
Elemental Sulfur ◽  
Metal Free

Synthesis of α-Keto Thioamides by Metal-Free C═C Bond Cleavage in Enaminones Using Elemental Sulfur

2018 ◽  
Vol 84 (2) ◽  
pp. 1064-1069 ◽  
Author(s):  
Lu Gan ◽  
Yong Gao ◽  
Li Wei ◽  
Jie-Ping Wan
Keyword(s):  
Elemental Sulfur ◽  
Bond Cleavage ◽  
Metal Free

Metal-Free Aminothiation of Alkynes: Three-Component Tandem Annulation toward Indolizine Thiones from 2-Alkylpyridines, Ynals, and Elemental Sulfur

2019 ◽  
Vol 84 (19) ◽  
pp. 12639-12647 ◽  
Author(s):  
Zhengwang Chen ◽  
Pei Liang ◽  
Fan Xu ◽  
Zhen Deng ◽  
Lipeng Long ◽  
...  
Keyword(s):  
Elemental Sulfur ◽  
Metal Free

scholarly journals Et3N/DMSO-supported one-pot synthesis of highly fluorescent β-carboline-linked benzothiophenones via sulfur insertion and estimation of the photophysical properties

2020 ◽  
Vol 16 ◽  
pp. 1740-1753 ◽  
Author(s):  
Dharmender Singh ◽  
Vipin Kumar ◽  
Virender Singh
Keyword(s):  
Transition Metal ◽  
Elemental Sulfur ◽  
Photophysical Properties ◽  
Quantum Yields ◽  
One Pot ◽  
Light Emitting ◽  
Metal Free ◽  
One Pot Synthesis ◽  
Synthetic Strategy ◽  
Reaction Proceeds

A robust transition-metal-free strategy is presented to access novel β-carboline-tethered benzothiophenone derivatives from 1(3)-formyl-β-carbolines using elemental sulfur activated by Et3N/DMSO. This expeditious catalyst-free reaction proceeds through the formation of β-carboline-based 2-nitrochalcones followed by an incorporation of sulfur to generate multifunctional β-carboline-linked benzothiophenones in good to excellent yields. The synthetic strategy could also be extended towards the synthesis of β-carboline-linked benzothiophenes. Moreover, the afforded products emerged as promising fluorophores and displayed excellent light-emitting properties with quantum yields (ΦF) up to 47%.

1,2-Arylalkylation of N-(arylsulfonyl)acrylamides using aliphatic aldehydes as the alkyl source

2017 ◽  
Vol 15 (26) ◽  
pp. 5476-5479 ◽  
Author(s):  
Jin-Tao Yu ◽  
Rongzhen Chen ◽  
Jiawei Zhu ◽  
Jiang Cheng
Keyword(s):  
Alkyl Radical ◽  
Aliphatic Aldehydes ◽  
Metal Free

A metal-free decarbonylative arylalkylation of N-(arylsulfonyl)acrylamides using aliphatic aldehydes as the alkyl radical source was developed.

Transition-Metal-Free Synthesis of 2-Substituted Benzothiazoles from Nitrobenzenes, Methylheteroaryl Compounds, and Elemental Sulfur, Based on Nitro-Methyl Redox-Neutral Cyclization

2020 ◽  
Vol 85 (23) ◽  
pp. 15213-15220
Author(s):  
Masahiro Teramoto ◽  
Mitsutaka Imoto ◽  
Motonori Takeda ◽  
Takumi Mizuno ◽  
Akihiro Nomoto ◽  
...  
Keyword(s):  
Transition Metal ◽  
Elemental Sulfur ◽  
Metal Free

Metal-free oxidative cyclization of 2-aminobenzothiazoles and cyclic ketones enabled by the combination of elemental sulfur and oxygen

2017 ◽  
Vol 19 (18) ◽  
pp. 4294-4298 ◽  
Author(s):  
Yanjun Xie ◽  
Xiangui Chen ◽  
Zhen Wang ◽  
Huawen Huang ◽  
Bing Yi ◽  
...  
Keyword(s):  
Elemental Sulfur ◽  
Oxidative Cyclization ◽  
Cyclic Ketones ◽  
Metal Free

Aerobic cyclization of 2-aminobenzothiazoles and cyclic ketones enabled by the combination of elemental sulfur and oxygen under metal-free conditions.

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