A one-step and chemoselective conversion of silyl-protected alcohols into the corresponding acetates
摘要:
A reagent system of acetyl bromide combined with a catalytic amount of tin(II) bromide cleaves readily trialkylsilyl ethers to give the corresponding acetates in high yields under very mild conditions.
Cationic Dirhodium Complexes Bridged by 2-Phosphinopyridines Having an Exquisitely Positioned Axial Shielding Group: A Molecular Design for Enhancing the Catalytic Activity of the Dirhodium Core
create highly electrophilic dirhodium catalysts. The electrophilicity of lantern-type dirhodium complexes is generally decreased by the coordination of a ligand to the axial site, which often causes a reduction in the catalytic activity. We designed and synthesized a series of cationic dirhodium complexesbridged by 2-diarylphosphinopyridines having a bulky 2,4,6-triisopropylphenyl (Tip) group that can
Etude de l'obtention d'enoxysilanes par action du triethylsilane sur des cetones enolisables, aliphatiques ou cyclaniques, en presence de catalyseurs au nickel
alkenoxysilanes has been achieved by the reaction of enolizable aliphatic or cyclic ketones with triethylsilane in the presence of nickel catalysts. For some catalysts, the reaction can be directed to give exclusively one or the other of these derivatives. The use of certain nickel catalysts gives very high yields of alkenoxysilanes, and this has been closely investigated.
Oriyama Takeshi, Oda Mihoko, Gono Junko, Koga Gen, Tetrahedron Lett, 35 (1994) N 13, S 2027-2030
作者:Oriyama Takeshi, Oda Mihoko, Gono Junko, Koga Gen
DOI:——
日期:——
A one-step and chemoselective conversion of silyl-protected alcohols into the corresponding acetates
作者:Takeshi Oriyama、Mihoko Oda、Junko Gono、Gen Koga
DOI:10.1016/s0040-4039(00)73040-1
日期:1994.3
A reagent system of acetyl bromide combined with a catalytic amount of tin(II) bromide cleaves readily trialkylsilyl ethers to give the corresponding acetates in high yields under very mild conditions.
Phosphine-Catalyzed Reductions of Alkyl Silyl Peroxides by Titanium Hydride Reducing Agents: Development of the Method and Mechanistic Investigations
作者:Jason R. Harris、M. Taylor Haynes、Andrew M. Thomas、K. A. Woerpel
DOI:10.1021/jo1008367
日期:2010.8.6
A method that allows for the reduction of protected hydroperoxides by employing catalytic amounts of phosphine is presented. The combination of a titanium(IV) alkoxide and a siloxane allowed for the chemoselective reduction of phosphine oxides in the presence of alkyl silyl peroxides. Subsequent reduction of the peroxide moiety by phosphine provided the corresponding silylated alcohols in useful yields