Silica Chloride (SiO<sub>2</sub>-Cl), a New Heterogeneous Reagent, for the Selective and Efficient Conversion of Benzylic Alcohols to Their Corresponding Chlorides and Iodides
Abstract Structurally different benzylic alcohols were efficiently converted to their corresponding chlorides by silica chloride (SiO2-Cl) in CHCl3 at room temperature. Silica chloride is also able to convert benzylic alcohols to their iodides in the presence of NaI in a mixture of CH3CN/CHCl3 in excellent yields.
摘要 在室温下,在 CHCl3 中的氯化硅 (SiO2-Cl) 可以将结构不同的苄醇有效地转化为其相应的氯化物。在 NaI 存在下,在 CH3CN/CHCl3 混合物中,氯化硅也能够以极好的收率将苄醇转化为其碘化物。
Reactions of lead tetra-acetate. Part XI. The oxidation of styrene
作者:R. O. C. Norman、C. B. Thomas
DOI:10.1039/j29670000771
日期:——
Styrene reacts with leadtetra-acetate to give at least four products, PhCH(OAc)Et, PhCH(OAc)·CH2OAc, PhCH2·CH(OAc)2, and PhCHO. The relative yields of the first three are strongly dependent on the conditions of the reaction. A systematic study of these variations, together with kinetic evidence, has shown that the first product results from a radical-chain reaction and the third from a heterolytic
By using 4–10 mol% Fe(III) oxo acetate catalyst, prepared by solid state atmospheric oxidation of Fe(II) acetate, in combination with triethylsilane and chlorotrimethylsilane, hydrosilylation of benzylic carbonyl compounds with subsequent chlorination is achieved within a few hours at room temperature. This new method is mild and rapid compared to the conventional two step approach involving reduction
Organotitanium chemistry XVIII. Dehalogenation of organic halides by Cp2TiX (X = Cl, Br)
作者:Qian Yanlong、Li Guisheng、Yao-Zeng Huang
DOI:10.1016/0022-328x(90)85446-6
日期:1990.1
Dicyclopentadienyltitanium chloride and bromide prepared in situ from the reduction of dicyclopentadienyltitanium dichloride by isopropylmagnesium chloride and bromide, respectively, are effective dehalogenating reagents for benzylic, allylic halides and α-bromoketones. Benzylic and allylic halides are transformed into the coupling products whereas the α-bromoketones are reduced to the corresponding ketones