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Full-Text Articles in Physical Sciences and Mathematics
Beckmann Rearrangement Of Cyclotriveratrylene (Ctv) Oxime: Tandem Beckmann-Electrophilic Aromatic Addition, Marlon R. Lutz Jr., Matthias Zeller, Daniel P. Becker
Beckmann Rearrangement Of Cyclotriveratrylene (Ctv) Oxime: Tandem Beckmann-Electrophilic Aromatic Addition, Marlon R. Lutz Jr., Matthias Zeller, Daniel P. Becker
Chemistry: Faculty Publications and Other Works
The Beckmann rearrangement has been performed on the oxime of cyclotriveratrylene (CTV) with thionyl chloride affording the ring-expanded 10-membered ring amide exclusively in high yield. Modified conditions afford a helical pentacycle derived from an unusual tandem Beckmann rearrangement and electrophilic aromatic addition followed by demethylation and tautomerization.
Synthesis Of Substituted 2-Amino-Cyclobutanones, Nicola Armoush, Preeti Syal, Daniel P. Becker
Synthesis Of Substituted 2-Amino-Cyclobutanones, Nicola Armoush, Preeti Syal, Daniel P. Becker
Chemistry: Faculty Publications and Other Works
A series of weakly nucleophilic nitrogen derivatives including carbamates, amides, sulfonamides, and anilines were reacted with 1,2‐bis(trimethylsilyloxy)cyclobutene under acidic conditions to afford various substituted 2‐aminocyclobutanone derivatives 3a–i in modest to excellent yields.
Simultaneous Measurements Of Electronic Conduction And Raman Response In Molecular Junctions, Daniel R. Ward, Naomi J. Halas, James M. Tour, Jacob W. Ciszek, Yanpeng Wu, Peter Nordlander, Douglas Natelson
Simultaneous Measurements Of Electronic Conduction And Raman Response In Molecular Junctions, Daniel R. Ward, Naomi J. Halas, James M. Tour, Jacob W. Ciszek, Yanpeng Wu, Peter Nordlander, Douglas Natelson
Chemistry: Faculty Publications and Other Works
Electronic conduction through single molecules is affected by the molecular electronic structure as well as by other information that is extremely difficult to assess, such as bonding geometry and chemical environment. The lack of an independent diagnostic technique has long hampered single-molecule conductance studies. We report simultaneous measurement of the conductance and the Raman spectra of nanoscale junctions used for single-molecule electronic experiments. Blinking and spectral diffusion in the Raman response of both para-mercaptoaniline and a fluorinated oligophenylyne ethynylene correlate in time with changes in the electronic conductance. Finite difference time domain calculations confirm that these correlations do not result …