specific chemoselectivity for hydrogenation that has never been achieved by other palladium‐catalyzed methods. Either aliphatic or aromatic N‐Cbz groups could be deprotected to the corresponding free‐amines, while the hydrogenolysis of benzyl esters and ethers did not proceed. Furthermore, aryl chlorides and epoxides were tolerant under the Pd/ceramic‐catalyzed hydrogenation conditions. 5 % Pd/ceramic
Facile Cleavage of Silyl Protecting Groups with Catalytic Amounts of FeCl<sub>3</sub>
作者:Yikang Wu、Yong-Qing Yang、Jia-Rong Cui、Lin-Gui Zhu、Ya-Ping Sun
DOI:10.1055/s-2006-926256
日期:——
A very mild and environmentally benign method for removal of silyl protecting groups using catalytic amounts of iron ion in MeOH is presented. The method is particularly effective for cleaving triethylsilyl (TES) protecting groups.
We report herein the possibility to perform the hydrosilylation of carbonyls using actinide complexes as catalysts. While complexes of the uranyl ion [UO2]2+ have been poorly considered in catalysis, we show the potentialities of the Lewis acid [UO2(OTf)2] (1) in the catalytic hydrosilylation of a series of aldehydes. [UO2(OTf)2] proved to be a very active catalyst affording distinct reduction products
A remarkable solvent effect toward the Pd/C-catalyzed cleavage of silyl ethersElectronic supplementary information (ESI) available: characterization data and references and supplementary Tables 4 and 5. See http://www.rsc.org/suppdata/cc/b2/b211313a/
A very simple and efficient method is described for silylation of alcohols and phenols using triisopropylsilyl chloride and imidazole under microwave irradiation. High selectivity was observed for silylation of primary and secondary alcohols and also for structurally different phenols.