InCl<sub>3</sub>/Me<sub>3</sub>SiBr-Catalyzed Direct Coupling between Silyl Ethers and Enol Acetates
作者:Yoshiharu Onishi、Yoshihiro Nishimoto、Makoto Yasuda、Akio Baba
DOI:10.1021/ol200875m
日期:2011.5.20
A combined Lewis acid catalyst of InCl3 and Me3SiBr promoted the direct use of enol acetates in the coupling with low-reactive silyl ethers, in which functional groups including ketones and aldehydes survived. Sterically hindered silyl ethers such as ROSiEt3, ROSiPh3, ROSit-BuMe2, and ROSii-Pr3 were also applicable.
Mesoporous Nickel–Aluminosilicate Nanocomposite: A Solid Acid Catalyst for Ether Synthesis
作者:N. Neelakandeswari、R. Karvembu、N. Dharmaraj
DOI:10.1166/jnn.2013.7419
日期:2013.4.1
Mesoporous nickel aluminosilicate, a solid acid catalyst prepared by sol–gel technique was utilized as a heterogeneous catalyst for the synthesis of symmetrical ethers by dehydro-condensation of alcohols. The prepared catalysts were characterized by Fourier-transform infra red spectroscopy (FT-IR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), N2 adsorption–desorption analysis, temperature programmed desorption of ammonia (TPD) and X-ray photoelectron spectroscopic techniques. The presence of the catalyst assisted the etherification reaction in 30 minutes. Ethers formed in these reactions were quantified by gas chromatography (GC) and the identities of few of them were confirmed by nuclear magnetic resonance spectral data (NMR).
well‐defined molecular Cp*CoIII complex was isolated and structurally characterized for the first time. The efficiency of this cobalt catalyst was demonstrated in the alcohol dehydrogenation and dehydrative coupling of secondary alcohols under mild conditions into ketones and ethers, respectively.
首次分离并定义了一种新颖的,分子清晰的Cp * Co III复合物。在中等条件下仲醇的醇脱氢和脱水偶合成酮和醚的过程中,证明了该钴催化剂的效率。
Direct halogenation of alcohols with halosilanes under catalyst- and organic solvent-free reaction conditions
作者:Njomza Ajvazi、Stojan Stavber
DOI:10.1016/j.tetlet.2016.04.083
日期:2016.6
A chemoselective method for the direct halogenation of different types of alcohols with halosilanes under catalyst- and solvent-freereactionconditions (SFRC) is reported. Various primary, secondary and tertiary benzyl alcohols and tertiary alkyl alcohols were directly transformed to the corresponding benzyl and alkyl halides, respectively, using chlorotrimethylsilane (TMSCl) and bromotrimethylsilane
Iodine-catalyzed Transformation of Aryl-substituted Alcohols Under Solvent-free and Highly Concentrated Reaction Conditions
作者:Marjan Jereb、Dejan Vražič
DOI:10.17344/acsi.2017.3841
日期:2017.12.15
transformations of alcohols under solvent-free reaction conditions (SFRC) and under highly concentrated reaction conditions (HCRC) in the presence of various solvents were studied in order to gain insight into the behavior of the reaction intermediates under these conditions. Dimerization, dehydration and substitution were the three types of transformations observed with benzylic alcohols. Dimerization