Catalytic reductive deoxygenation of esters to ethers driven by hydrosilane activation through non-covalent interactions with a fluorinated borate salt
We report the catalytic and transition metal-free reductive deoxygenation of esters to ethers through the use of a hydrosilane and a fluorinated borate BArF salt as a catalyst. Experimental and theoretical studies support the role of noncovalent interactions between the fluorinated catalyst, the hydrosilane and the ester substrate in the reaction mechanism.
Benzenetellurol is shown to behave as an effective reagent for the reductive conversion of carbonyl compounds into unsymmetrical ethers under the catalytic influence of ZnI2.
苯碲酚被证明是一种有效的试剂,在ZnI2的催化作用下能够将羰基化合物还原转化为非对称醚。
Palladium on Carbon-Catalyzed Benzylic Methoxylation for Synthesis of Mixed Acetals and Orthoesters
The palladium on carbon (Pd/C)‐catalyzed direct methoxylation of the benzylic positions of linear benzyl and cyclicether substrates proceeded in the presence of i‐Pr2NEt under an oxygen atmosphere to give the corresponding mixed acetals. Cyclic acetal derivatives could also be converted into orthoesters. The present direct methoxylation via a carbon‐hydrogen (C−H) functionalization can be accomplished
A comparative study on the catalytic activity of a series of [IrCl(2)Cp*(NHC)] complexes in several C-O and C-N coupling processes implying hydrogen-borrowing mechanisms has been performed. The compound [IrCl(2)Cp*(I(nBu))] (Cp*=pentamethyl cyclopentadiene; I(nBu)=1,3-di-n-butylimidazolylidene) showed to be highly effective in the cross-coupling reactions of amines and alcohols, providing high yields
Active Cobalt Catalyst for the Cleavage of Benzyl Ether
作者:Bo Wang、Zhaojun Yin、Yangbing Li、Ting-Xiang Yang、Xiang-Bao Meng、Zhong-Jun Li
DOI:10.1021/jo2018284
日期:2011.11.18
An improved method for the deprotection of benzylethers using a catalytic amount of Co2(CO)8 in the presence of Me2PhSiH and CO (1 atm) is described. The deprotection reaction is compatible with double bond or sulfur-containing substrates. The method also tolerates other functional groups, such as Ac, Piv, and Bz, and shows potential selectivity in perbenzylated monosaccharides.