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Volume 3, Issue 2 (Suppl) Trends in Green chem
ISSN: 2471-9889 Environmental & Green Chemistry 2017
July 24-26, 2017
Page 83
5 th International Conference on
6 th International Conference on
July 24-26, 2017 Rome, Italy
Environmental Chemistry and Engineering
Green Chemistry and Technology
&
Reusable cobalt-phthalocyanine in water: Efficient catalytic aerobic oxidative coupling of thiols to
synthesize organosulfur compounds
Bingxin Yuan, Xin Huang, Liting Yang, Yingchao Dou, Shan Zhen, Lijuan Song, Heng Li, Panke Zhang and Guanyu Yang
Zhengzhou University, China
Statement of the Problem: Organosulfur compounds have been vitally applied as synthetic intermediates and reagents in organic
synthesis, pharmaceutical and biological science. Nevertheless, the shortcomings of traditional methods are apparent, including toxic
organic waste, harsh reaction conditions (such as high temperature, long reaction hours, and risk of over-oxidation), extra additives
or bases, and tedious work-up procedures. Therefore, the development of novel and green strategies that can be carried out under mild
conditions for the synthesis of organosulfur compounds remains a challenge and is highly desired. In this contribution, we describe
the catalytic aerobic oxidation of thiols to synthesize disulfides, sulfonamides and diaryl sulfides. A reusable cobalt-e catalyzed aerobic
oxidative coupling of thiols to produce disulfides and sulfonamides in water was studied, which utilizes environmentally friendly and
naturally abundant O2 as the oxidant.
Findings: The mother liquor could be recycled up to 20 times with negligible loss of activity and only a minor decrease of product
yield. The same catalytic system was further extended to oxidative cross-coupling of naphthol/naphthylamine with thiols to form
diaryl sulfides bearing a wide range of substituents in good to excellent yields.
Conclusion & Significance: These highly efficient and versatile methodologies offer interesting prospects for the commercial
manufacturing of organosulfur compounds in a much greener and economical way.
Biography
Bingxin Yuan, PhD is an Assistant Professor of College of Chemistry and Molecular Engineering in Zhegnzhou University since 2016. She pursued her PhD degree
in organic Chemistry in USA and graduated in Aug, 2016. She started working in Zhengzhou University ever since. She has her expertise in novel organic synthesis
and organic semiconducting materials synthesis and characterization. Her work aim to address the challenges of organic synthesis in a greener way: design and
study of green catalysis with unique chemical properties. Her main research fields contain the radical and oxidative reaction as novel synthetic tools that are non-
hazardous and environmentally friendly for manufacture of chemicals.
Guanyu Yang is a Professor in College of Chemistry and Molecular Engineering, Zhengzhou University, China, since 2006. He received his Ph.D. of chemistry
in 2005 from Dalian Institute of Physical Chemistry, Chinese Academy of Sciences. His research interests center around the development of new synthetic
methodologies, and the more environmentally benign processes for the synthesis of higher added-value chemicals. For this aim, his research directs towards the
fundamental and applicable investigations of various catalytic techniques, involving organo-, biomimetic, heterogenous, and homogenous catalysis, as well as
the interdisciplinary approach. Much of his work is devoted to the development of novel synthetic methods via the catalytic oxidation with molecular oxygen as a
terminal oxidant.
Bingxin Yuan et al., Trends in Green chem, 3:2
DOI: 10.21767/2471-9889-C1-002