Room temperature silylation of alcohols catalyzed by metal organic frameworks
作者:Amarajothi Dhakshinamoorthy、Andrea Santiago-Portillo、Patricia Concepción、José R. Herance、Sergio Navalón、Mercedes Alvaro、Hermenegildo Garcia
DOI:10.1039/c7cy00834a
日期:——
The commercial Al(OH)(BDC) (BDC: 1,4-benzenedicarboxylic acid) metalorganicframework (Basolite A100) is a suitable heterogeneous catalyst for the silylation of benzylic and aliphatic alcohols by hexamethyldisilazane in toluene at roomtemperature. Al(OH)(BDC) is stable under the reaction conditions as evidenced by powder XRD and can be reused with minimal activity decrease.
Cross-linked poly(4-vinylpyridine/styrene) copolymer-supported bismuth(III) triflate: an efficient heterogeneous catalyst for silylation of alcohols and phenols with HMDS
作者:Sang-Hyeup Lee、Santosh T. Kadam
DOI:10.1002/aoc.1809
日期:2011.8
Cross‐linked poly(4‐vinylpyridine/styrene) copolymer‐supported bismuth(III) triflate (30P/S‐Bi) effectively activates hexamethyldisilazane (HMDS) for the silylation of alcohols and phenols. By the use of this heterogeneous catalytic system, a wide range of alcohols as well as phenols are converted into their corresponding trimethylsilyl ethers in high yield under mild reaction conditions. The catalyst was reused
The combination of hexamethyldisilane and a catalytic amount of [PdCl(η3-C3H5)]2–PPh3 was found to be effective for the trimethylsilylation of alcohols, where both of the two trimethylsilyl groups of hexamethyldisilane were transferred to alcohols without coproduction of any stoichiometric amount of byproduct but H2.
Gold nanoparticles-catalyzed activation of 1,2-disilanes: hydrolysis, silyl protection of alcohols and reduction of tert-benzylic alcohols
作者:Charis Gryparis、Manolis Stratakis
DOI:10.1039/c2cc35116a
日期:——
Gold nanoparticles supported on TiO2 catalyze under mild conditions the activation of a series of 1,2-disilanes towards hydrolysis and alcoholysis, with concomitant evolution of H2 gas. For the case of tert-benzyl alcohols, the main or only pathway is reduction to the corresponding alkanes.
Siloxy groups derived from secondary and tertiary benzyl alcohols can be transformed into azide groups at room temperature using TMSN3 in the presence of an iron catalyst (see scheme; TMS=trimethylsilyl). Secondary and tertiary benzylic silyl ethers can be transformed in the presence of primary silyl ethers, and other reactive functional groups, such as alkyl chlorides, α,β‐unsaturated esters, and aldehydes