نتایج جستجو برای: pyrroloquinoline quinone

تعداد نتایج: 5352  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Swarnalatha Y Reddy Thomas C Bruice

The mechanism of bacterial methanol dehydrogenase involves hydride equivalent transfer from substrate to the ortho-quinone PQQ to provide a C5-reduced intermediate that subsequently rearranges to the hydroquinone PQQH(2). We have studied the PQQ reduction by molecular dynamic (MD) simulations in aqueous solution. Among the five simulated structures, either Asp297 or Glu171 or both are ionized. ...

Journal: :Physical chemistry chemical physics : PCCP 2015
Jiani Ma Xiting Zhang Nikola Basarić Peter Wan David Lee Phillips

The excited state intramolecular proton transfer (ESIPT) reactions from a phenol (naphthol) to a carbon atom in the adjacent aromatic ring of 2-phenylphenol (1) and 2-phenyl-1-naphthol (4) are prototypical examples of intramolecular proton transfer not mediated by solvent molecules. Femtosecond time-resolved transient absorption (fs-TA) studies are conducted for the first time to directly probe...

Journal: :Chemical communications 2011
Hiroto Yoshida Yu Ito Joji Ohshita

ortho-Quinone methides, arising from a formal [2+2] cycloaddition between arynes and DMF, were found to facilely undergo a [4+2] cycloaddition with ester enolates or ketenimine anions to produce diverse coumarins in a straightforward manner.

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