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Thies Thiemann   Dr.  Senior Scientist or Principal Investigator 
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Thies Thiemann published an article in February 2018.
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Top co-authors See all
J.P. Graham

24 shared publications

United Arab Emirates University

Nathir A.F. Al-Rawashdeh

7 shared publications

Jordan University of Science and Technology, Faculty of Science and Arts, Chemistry Department, P.O.Box 3030, Irbid 22110, Jordan

Mariam Al Azani

3 shared publications

Yosef Al Jasem

3 shared publications

Department of Chemical Engineering, UAE University

Ahmed M. Soliman

2 shared publications

Department of Chemistry, UAE University

Publication Record
Distribution of Articles published per year 
(2009 - 2018)
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Publications See all
BOOK-CHAPTER 4 Reads 0 Citations Tandem-, Domino- and One-Pot Reactions Involving Wittig- and Horner-Wadsworth-Emmons Olefination Fatima Merza, Ahmed Taha, Thies Thiemann Published: 07 February 2018
Alkenes, doi: 10.5772/intechopen.70364
DOI See at publisher website
CONFERENCE-ARTICLE 8 Reads 0 Citations Investigation of the Appel reaction with bromotrichloromethane-triphenylphosphine (CBrCl3/PPh3) Abdullah Al-Hemyari, Muna Bufaroosha, Thies Thiemann Published: 03 November 2017
The 21st International Electronic Conference on Synthetic Organic Chemistry, doi: 10.3390/ecsoc-21-04730
DOI See at publisher website ABS Show/hide abstract

The Appel reaction of an alcohol with CCl4/PPh3 and with CBr4/PPh3 produce alkyl chlorides and alkyl bromides, respectively. It was found that in the case of using CBrCl3-PPh3, a mixture of alkyl chlorides and alkyl bromides are formed. Dichloromethane (CH2Cl2) and acetonitrile (CH3CN) were used as solvents, where the reaction was found to be solvent-dependent. 

CONFERENCE-ARTICLE 8 Reads 0 Citations Preparation of methoxy-substituted para-benzoquinones Thies Thiemann, Nuha al Soom, Saber Elsuccary Published: 01 November 2016
The 20th International Electronic Conference on Synthetic Organic Chemistry, doi: 10.3390/ecsoc-20-a007
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A facile route to 5-substituted 2-methoxy-para-benzoquinones from 5-substituted 2-methoxyphenols is described. Spectral data of the compounds is discussed. The cyclovoltammographic behaviour of some of the 2-methoxy-parabenzoquinones is shown. The synthetic route is also used to prepare steroid-methoxy-para-benzoquinone hybrids.
Article 1 Read 0 Citations Preparation of 3-(9-Anthryl)acrylates and 9-Aroylethenylanthracenes as Pi-Extended Anthracenes and Their Diels–Alder Typ... Hasnaa Sadeq, Thies Thiemann, John P. Graham, Yosef Al Jasem... Published: 31 August 2016
Polycyclic Aromatic Compounds, doi: 10.1080/10406638.2016.1220962
DOI See at publisher website
Article 4 Reads 2 Citations Fluorinated steroids and their derivatives Yosef Al Jasem, Thies Thiemann, Lurdes Gano, Maria Cristina ... Published: 01 May 2016
Journal of Fluorine Chemistry, doi: 10.1016/j.jfluchem.2016.03.009
DOI See at publisher website
Article 3 Reads 0 Citations [4+2]-Cycloaddition Of Sterically Hindered Thiophene S-Oxides To Alkenes And So Extrusion Reactions Of The Cycloadducts Thies Thiemann, Jesus Iniesta, David J. Walton Published: 20 January 2016
Phosphorus, Sulfur, and Silicon and the Related Elements, doi: 10.1080/10426507.2015.1100191
DOI See at publisher website
Conference papers
CONFERENCE-ARTICLE 6 Reads 0 Citations Our experience of using thermally recycled silica gel in a research laboratory setting Fatima Sbait Wahshi, Maitha Dhaiman Alqahtani, Manhal Abdull... Published: 14 November 2018
doi: 10.3390/ecsoc-22-05696
DOI See at publisher website ABS Show/hide abstract

Organic synthetic research laboratories generate a large amount of waste. Some of the waste is the silica gel used as the stationary phase in column chromatographic separations. Here, the authors discuss the possibility of recycling silica gel wastes thermally at 600 oC, at which temperature the remnant adsorbed organic material combusts. It could be shown that the recycled silica gel maintains its adsorption characteristics. The process could be repeated 10 times with any discernable deterioration of the separation properties of the silica gel. In those cases where triphenyl oxide remained on the silica gel after the separation of the reaction mixture, such as after Wittig olefination and Appel-type reactions, an increase of phosphorus content was noted in the silica gel after thermal treatment. The original and recycled silica gel was partly analyzed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy(EDS) and in inductively coupled plasma - optical emission spectroscopy (ICP-OES). The process significantly reduced waste production in our laboratory and also led to a reduction in costs associated with acquiring new silica gel and with the management and the disposal of spent silica gel. A simple environmental impact assessment has been carried out.