(Trialkylstannyl)dimethylsilane as a new precursor of dimethylsilylene: a novel synthesis of 3,4-disubstituted 1-silacyclopenta-2,4-dienes
摘要:
In the presence of triphenylphosphinepalladium complexes, (trialkylstannyl)dimethylsilane rapidly reacted at room temperature with terminal acetylenes to give 3,4-disubstituted 1-silacyclopenta-2,4-dienes in moderate yield. The formation of 1-silacyclopentadiene derivatives is evidence for the generation of dimethylsilylene species from (trialkylstannyl)dimethylsilane.
Reactivity of the Base-Stabilized Bis(silylene)iron Complex (η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)Fe(CO)(η<sup>2</sup>-SiMe<sub>2</sub>-O<i><sup>t</sup></i>Bu-SiMe<sub>2</sub>): Elevated Temperature Trapping of SiMe<sub>2</sub> by R<sub>3</sub>EH (R = Me<sub>3</sub>Si, E = Si, Ge) and Elimination of Me<sub>2</sub>(O<sup>t</sup>Bu)SiSiMe<sub>2</sub>H by <i>n</i>-Bu<sub>3</sub>SnH
作者:Hemant K. Sharma、Keith H. Pannell
DOI:10.1021/om000563j
日期:2001.1.1
The base-stabilized silylene complex (eta (5)-C5H5)Fe(CO)(eta (2)-SiMe2-(OBu)-Bu-t-SiMe2) is unreactive toward (Me3Si)(3)EH (E = Si, Ge) under photochemical irradiation or at room temperature. However, at 80 degreesC it reacts, presumably via the equilibrium concentration of base-free complex (eta (5)-C5H5)Fe(CO)((SiMe2OBu)-Bu-t)(=SiMe2), to transfer the silylene group and form (Me3Si)(3)ESiMe2H. Attempts to transfer the SiMe2 group to tributyltin hydride led to formation of bis(tributylstannyl)iron completes.