Results 311 to 320 of about 36,445 (329)

Radiation-Driven Destruction of Thiophene and Methyl-Substituted Thiophenes

Astrobiology
Thiophene and two derivatives (2-methylthiophene and 3-methylthiophene) have been detected on the surface of Mars with the Sample Analysis at Mars instrument suite onboard NASA's Curiosity rover. Thiophene could serve as a secondary chemical biosignature since the secondary biosynthesis of thiophene is considered an important production pathway ...
Patrick D. Tribbett, Yukiko Y. Yarnall, Reggie L. Hudson, Perry A. Gerakines, Christopher K. Materese   +4 more
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Growth of nanofibers from thiophenes, thiophene-phenylenes, and phenylenes: a systematic study

SPIE Proceedings, 2007
The synthesis of molecules consisting of various combinations of phenylene and thiophene groups and the subsequent vacuum growth of needle-shaped nanoaggregates on specific surfaces allows us a systematic investigation of the transition between single parallel and multiple aligned needle ('nanofiber') growth.
Balzer, Frank, Schiek, Manuela, Lützen, Arne, Al-Shamery, Katharina, Rubahn, Horst-Günter   +4 more
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Efficient Syntheses of 2-Functionalized Thiophenes, Cyclopent[b]thiophenes, and Polysubstituted Benzo[b]thiophenes from 2-(Benzotriazol-1-ylmethyl)thiophenes

The Journal of Organic Chemistry, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Larisa Serdyuk, Ion Ghiviriga, Alan R. Katritzky, Linghong Xie   +3 more
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Chapter 5 Thiophenes and benzo[b]thiophenes

2007
Publisher Summary Thiophene is a useful template for four-carbon homologation via reduction, as well as a bioisostere of the benzene ring and other heterocycles in medicinal chemistry. Thiophene is a π-electron-excessive heterocycle. It favors electrophilic substitution, which, similar to metalation, takes place preferably at the α-positions due to
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Porphyrins Based on Thiophene

Phosphorus, Sulfur, and Silicon and the Related Elements, 1994
Abstract The virgin field of “Porphyrins Based on Thiophene” is opened up by the biomimetic-type cyclocondensation of the α-hydroxymethylthiophene 1.
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Supramolecular Thiophene Nanosheets

Angewandte Chemie, 2013
Hans-Jürgen Butt, Taichi Ikeda, Kaloian Koynov, Haixin Zhou, Dian Liu, George Floudas, Yijun Zheng, Markus Mezger, Manfred Wagner   +8 more
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Paal thiophene synthesis

2009
Thiophene synthesis from addition of a sulfur atom to 1,4-diketones and subsequent dehydration.
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A Convenient Synthesis of Mannich Bases of Thiophene and Substituted Thiophenes [PDF]

Synthesis, 1983
Cheryl N. Williams, Michael Dennis Dowle, Duncan B. Judd, Roger Hayes   +3 more
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Fiesselmann thiophene synthesis

2009
Condensation reaction of thioglycolic acid derivatives with α,β-acetylenic esters, which upon treatment with base result in the formation of 3-hydroxy-2- thiophenecarboxylic acid derivatives.
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New Thiophens and Thieno [2,3‐b]thiophens

Angewandte Chemie International Edition in English, 1962
E. Kutter, R. Gompper
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