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By Yoko Nakai-Futatsugi and Hitoshi Niwa

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Additional resources for [Article] Transcription Factor Network in Embryonic Stem Cells: Heterogeneity under the Stringency

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1. Catalytic oxidations using ruthenium porphyrins 27 in effects the stoichiometric epoxidation of olefins such as norbornene, styrene and cis- and trans-stilbene according to eq. 7 ratio, and transstilbene gives mainly trans-epoxide67. The supposed Ru(IV)=O co-product reacts with present to form inactive and no catalysis occurs even up to 10 atm The 2nd-order rate constant for reaction 29 with norbornene was at 25°C67. In pyridine solution, a reaction similar to 29 generates and two equivalents of epoxide.

A higher catalytic activity at lower Ru content was attributed to efficient site isolation, coupled with diffusion reaction pathways, conditions that precluded formation of stable, catalytically inactive species. % Ru catalyst; 230 turnovers were achieved with Ru(TCPP)(CO)(EtOH) as a homogeneous catalyst in In general, the turnovers were 20-40 times higher with the supported catalyst, which was stable under the oxidation conditions, with activities not changing after 2 days of reaction. Although the turnover numbers are reasonable, the chemoselectivity for the supported catalyst is poor.

The use of rather than air did not increase the oxidation rates 65,167,168 . e. the activities were similar over 24 h, but the TDCPP analogue was more susceptible to deactivation via a decarbonylation process that generated the Ru(CO) derivative168. For the oxidation of benzhydrols, the perchloro derivative exhibited activity similar to that of The stoichiometric reaction between and the alcohols (2propanol, and under Ar conforms to that shown in eq. 33 or Ph(H)), as evidenced by NMR. The paramagnetic bis(alkoxy)ruthenium(IV) complexes were isolated and fully characterized by NMR, UV-vis and IR spectroscopies, magnetic moment data (2 unpaired electrons), and X-ray structures for and The NMR spectra show upfield, paramagnetic shifts for the hydrogens to the to -34 region (vs.

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