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• W2022647268 abstract "The homogeneous catalytic hydrosilation-hydrogenation of pyridines is observed in the presence of Cp 2 TiMe 2 (Cp = η 5 -C 5 H 5 ) and CpCp*TiMe 2 (Cp* = η 5 -C 5 Me 5 ) as catalysts and using PhSiH 3 or PhMeSiH 2 as the source of Si-H. Under appropriate conditions, and with appropriate ring-substitution, good yields of the N-silyl-dihydropyridine or N-silyltetrahydropyridine products are be obtained. Although complete saturation is not achieved with organosilane alone, carrying out the reaction under moderate H 2 pressures can give excellent yields of N-silylpiperidines. Under moderate pressures of H 2 , [Cp 2 TiH] 2 catalyzes rapid H-D exchange between H 2 and the 2- and 6-positions of C 5 D 5 N. Under the same conditions, only traces of hydrogenation are observed. This, together with the regioselectivity of 3-picoline hydrosilation-hydrogenation, leads to the conclusion that the key step in the reaction is probably addition of Ti-Si to C=N.Key words: hydrosilation, hydrogenation, pyridines, dimethyltitanocene, catalysis." @default.
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• W2022647268 date "2001-05-01" @default.
• W2022647268 modified "2023-10-16" @default.
• W2022647268 title "Titanocene(III) catalyzed homogeneous hydrosilation-hydrogenation of pyridines" @default.
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• W2022647268 doi "https://doi.org/10.1139/v00-191" @default.
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