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Your search keyword '"Nishiura, Masayoshi"' showing total 9 results
Start Over Author "Nishiura, Masayoshi" Publisher elsevier b.v.
9 results on '"Nishiura, Masayoshi"'

8. Rare earth alkyl and hydride complexes bearing silylene-linked cyclopentadienyl-phosphido ligands. Synthesis, structures, and catalysis in olefin hydrosilylation and ethylene polymerization

Author

Tardif, Olivier, Nishiura, Masayoshi, and Hou, Zhaomin

Subjects
*RARE earth metals, *CRYSTALS, *HYDRIDES, *CYCLIC compounds
Abstract

A series of silylene-linked cyclopentadienyl-phosphido rare earth alkyl and hydride complexes of type Me2Si(C5Me4)(PR′)LnR (Ln=Y, Yb, Lu; R′=Ph, Cy, C6H2tBu3-2,4,6; R=CH2SiMe3, H) have been synthesized and structurally characterized, and their activity in ethylene polymerization and olefin hydrosilylation has been studied. These complexes represent the first examples of rare earth alkyl and hydride complexes bearing cyclopentadienyl-phosphido ligands, which are in sharp contrast both structurally and chemically with the analogous cyclopentadienyl-amido and metallocene complexes. [Copyright &y& Elsevier]

Published
2003
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9. Synthesis of novel tetrazole C5-linked C0- and C2-ribonucleoside phosphoramidites using MePOM and POM groups for probing RNA catalysis

Author

Harusawa, Shinya, Yoneyama, Hiroki, Fujisue, Daiki, Nishiura, Masayoshi, Fujitake, Mihoyo, Usami, Yoshihide, Zhao, Zheng-yun, McPhee, Scott A., Wilson, Timothy J., and Lilley, David M.J.

Subjects
*TETRAZOLES, *ORGANIC synthesis, *RIBONUCLEOSIDES, *PHOSPHORAMIDITES, *ORGANOPHOSPHORUS compounds, *CATALYTIC RNA
Abstract

Abstract: Novel C5-linked C0- and C2-tetrazole ribonucleoside phosphoramidites were designed and synthesized via tetrazole C-nucleosides. Pivaloyloxymethyl (POM) and methyl-substituted POM (MePOM) groups were introduced as N-protecting groups in the tetrazole ring that can be readily removed under mild basic conditions. The phosphoramidites were successfully incorporated into the VS ribozyme substrate and hence providing a chemogenetic approach to determine which nucleobases of ribozymes function as the acid or base, in the studies of ribozyme general acid and base catalysis. [Copyright &y& Elsevier]

Published
2012
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