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Full-Text Articles in Organic Chemistry

Studies Towards The Synthesis Of 2,5-Disubstituted-3-Flurothiophenes Using A Tandem Directed Ortho Metallation/Nickel Catalyzed Cross-Coupling Approach, Nicholas P. Onuska, Paul Sampson, Alexander Seed Mar 2016

Studies Towards The Synthesis Of 2,5-Disubstituted-3-Flurothiophenes Using A Tandem Directed Ortho Metallation/Nickel Catalyzed Cross-Coupling Approach, Nicholas P. Onuska, Paul Sampson, Alexander Seed

Undergraduate Research Symposium

2,5-Disubstituted 3-fluorothiophene derivatives are of interest as building blocks in liquid crystal materials synthesis. This poster details the development of 2-thienyl carbamates and related compounds as flexible building blocks for the construction of 2,5-disubstituted 3-fluorothiophenes. Our approach involves oxidation of 5-substituted 2-thienyl trifluoroborates to the corresponding thienones followed by O-trapping of the corresponding enolate as the 2-thienyl carbamate. Studies aimed at the elaboration of to 2,5-disubstituted 3-fluorothiophenes using a sequential directed ortho-metalation/fluorination/Ni-catalyzed cross-coupling approach will be presented.


Biphenyl-(1,2,4)-Oxadiazole Liquid Crystals, Sonia Britton, Todd Ness, Christopher E. Ruth Mar 2015

Biphenyl-(1,2,4)-Oxadiazole Liquid Crystals, Sonia Britton, Todd Ness, Christopher E. Ruth

Undergraduate Research Symposium

Biphenyl-(1,2,4)-oxadiazole Liquid Crystals

Sonia Britton, Todd Ness, Christopher E. Ruth, Robert Twieg, and Farid Fouad

The incorporation of the 1,2,4-oxadiazole entity in the core of a calamitic heterocyclic liquid crystal results in the formation of a bent geometry, known as the “banana structure”. This 135o bend angle is what many believe to be the reason for the distinct characteristics absolved from incorporation of oxadiazoles in liquid crystals. Researchers found it intriguing to incorporate oxadiazoles into liquid crystals for organic electrodes because of their charge carrier mobility, exceptional chemical and thermal stability, and high ...