An efficient Passerini tetrazole reaction (PT-3CR)

Graphical abstract: An efficient Passerini tetrazole reaction (PT-3CR)

An efficient Passerini tetrazole reaction (PT-3CR)

Green Chem., 2016, 18,3718-3721

DOI: 10.1039/C6GC00910G, Communication

Ajay L. Chandgude, Alexander Domling

A sonication accelerated, catalyst free, simple, high yielding and efficient method for the Passerini-type three-component reaction (PT-3CR) has been developed.

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C6GC00910G?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

A sonication accelerated, catalyst free, simple, high yielding and efficient method for the Passerini-type three-component reaction (PT-3CR) has been developed. It comprises the reaction of an aldehyde/ketone, an isocyanide and a TMS-azide in methanol : water (1 : 1) as the solvent system. The use of sonication not only accelerated the rate of the reaction but also provided good to excellent quantitative yields. This reaction is applicable to a broad scope of aldehydes/ketones and isocyanides.

An efficient Passerini tetrazole reaction (PT-3CR)

*
Corresponding authors
a
Department of Drug Design, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
E-mail: a.s.s.domling@rug.nl
Web: http://www.drugdesign.nl/
Green Chem., 2016,18, 3718-3721

DOI: 10.1039/C6GC00910G

/////////////Passerini tetrazole reaction (PT-3CR)

Oxidation of refractory sulfur compounds with molecular oxygen over a Ce-Mo-O catalyst

Oxidation of refractory sulfur compounds with molecular oxygen over a Ce-Mo-O catalyst

 Green Chem., 2016, Advance Article
DOI: 10.1039/C6GC01357K, Paper
Yawei Shi, Guozhu Liu, Bofeng Zhang, Xiangwen Zhang
A Ce-Mo-O catalyst showed remarkable performance for aerobic oxidative desulfurization without sacrificial agents at 100 [degree]C and atmospheric pressure.

Oxidation of refractory sulfur compounds with molecular oxygen over a Ce–Mo–O catalyst

Yawei Shi,a   Guozhu Liu,*a   Bofeng Zhanga and  Xiangwen Zhang*a  
*
Corresponding authors
a
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Collaborative Innovation Centre of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
E-mail: gliu@tju.edu.cnzhangxiangwen@tju.edu.cn
Fax: +86 22 27892340
Tel: +86 22 27892340
Green Chem., 2016, Advance Article

DOI: 10.1039/C6GC01357K

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C6GC01357K?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract

A Ce–Mo–O catalyst prepared by a simple sol–gel method was proved to be highly active for aerobic oxidative desulfurization. Almost complete conversions of dibenzothiophene and 4,6-dimethyldibenzothiophene were achieved without any additional sacrificial agent at 100 °C and atmospheric pressure, and the conversion of benzothiophene could reach 97%. Reusability of the catalyst was also conducted, and >99% conversions could be achieved in three consecutive runs. As supported by carefully-designed control experiments, oxygen was activated by Ce species in the catalyst first, forming some reactive oxygen species, which oxidized DBT into DBTO2 with the assistance of Mo species. Furthermore, selective quenching experiments indicated the generation of superoxide species during the reaction.

/////////

Visible-light-activated copper(I) catalyzed oxidative Csp–Csp cross-coupling reaction: efficient synthesis of unsymmetrical conjugated diynes without ligands and base

 

A novel visible-light-promoted copper-catalysed process for the Csp–Csp cross-coupling reaction of terminal alkynes at room temperature is described. The current photochemical method is simple, highly functional group compatible, and more viable towards the construction of bio-active 1,3-unsymmetrical conjugated diynes without the need of bases/ligands, additives and expensive palladium/gold catalysts.

Visible-light-activated copper(I) catalyzed oxidative Csp-Csp cross-coupling reaction: efficient synthesis of unsymmetrical conjugated diynes without ligands and base

Green Chem., 2016, Advance Article
DOI: 10.1039/C6GC01463A, Communication
Arunachalam Sagadevan, Ping-Chiang Lyu, Kuo Chu Hwang
An efficient and eco-friendly approach to Csp-Csp cross-coupling of terminal alkynes for the construction of unsymmetrical conjugated diynes via a visible-light-induced CuCl catalysed process at room temperature is described.
Communication

Visible-light-activated copper(I) catalyzed oxidative Csp–Csp cross-coupling reaction: efficient synthesis of unsymmetrical conjugated diynes without ligands and base

*Corresponding authors
aDepartment of Chemistry, National Tsing Hua University, Hsinchu, Republic of China
bInstitute of Bioinformatics and Structural Biology and College of Life Sciences, National Tsing Hua University, Hsinchu, Republic of China
E-mail: kchwang@mx.nthu.edu.tw
Fax: +886 35711082
Green Chem., 2016, Advance Article

http://pubs.rsc.org/en/Content/ArticleLanding/2016/GC/C6GC01463A?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+rss%2FGC+%28RSC+-+Green+Chem.+latest+articles%29#!divAbstract
DOI: 10.1039/C6GC01463A

str1

 

str1

str1

 

str1

 

str1

 

////////Visible-light-activated,  copper(I) catalyzed,  oxidative Csp–Csp cross-coupling reaction,  unsymmetrical conjugated diynes