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A unique application of the CuIPr N-heterocyclic carbene (NHC) to the dehydrogenative self-coupling of diphenylsilane has been discovered. This transformation is carried out open to air at room temperature, yielding octaphenylcyclotetra(siloxane) quantitatively in 1h. This preparation constitutes a significant improvement over existing methods for the preparation of this compound and demonstrates...
Thermodynamic parameters (ΔG, ΔH, ΔS, ΔC p ) have been determined to evaluate the dynamics of binding of saxitoxin to the c-lobe of saxiphilin. We have developed an improved method to rapidly express and purify recombinant saxiphilin c-lobe, and fully characterized it by mass spectrometry for the first time. Surface plasmon resonance (SPR) was used to characterize the interaction between saxitoxin...
At pH 7.1, saxitoxin decomposes to produce a trace impurity that can interfere with fluorescence sensing when using irradiation wavelengths near 325nm. The fluorophore acridine is found to be a suitable component of arylmethyl crown ether chemosensors for the fluorescent detection of saxitoxin. These sensors are selective for the detection of saxitoxin over tetrodotoxin.
A selection of N-substituted 2-lithiopyrrolidines were prepared and their structures were investigated by 6 Li and 13 C NMR spectroscopy. Evidence is presented for aggregation and dynamic solvation effects, depending on the nature of the N-substituent and substituents on the pyrrolidine ring. Studies were performed with N-Boc (coordinating carbonyl group), N-methoxyethyl (coordinating...
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