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Allyl Chloride (allyl + chloride)
Selected AbstractsAn Efficient and Stereoselective Synthesis of (Z)-Allyl Chlorides from Baylis,Hillman Adducts Using Vilsmeier,Haack Reagent.CHEMINFORM, Issue 34 2007Y. Liu Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Epoxidation of allyl chloride and hydrogen peroxide over titanium silicalite-1 film on SiO2 pellet supportJOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY, Issue 4 2007Li Wang Abstract Titanium silicalite-1 (TS-1) films were prepared on SiO2 pellet supports via an in situ hydrothermal synthesis method and were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and 29Si magic angle spinning nuclear magnetic resonance (Si MAS NMR). The growth time of TS-1 film had a strong effect on its morphology and the thickness and size of the crystals. The uniformity and thickness of TS-1 films increased with increase of growth times. The epoxidation of allyl chloride (ACH) with dilute hydrogen peroxide to form epichlorohydrin (ECH) over the TS-1 films was carried out in a fixed bed reactor. The conversion of ACH and the selectivity to ECH over the TS-1 films of the second growth were higher than that of the first growth, the third and the fourth growth. And the conversion and selectivity as a function of time-on-stream gave a good stable performance in an extended test up to at least 19 h. The final steady-state conversion and selectivity were approximately 86% and 55%, respectively. Copyright © 2007 Society of Chemical Industry [source] Synthesis of novel stereodefined vinylgermanes bearing an allyl group or an allenyl group: (E)-2-aryl-1-germylalka-1,4-dienes and (E)-4-aryl-5-germylpenta-1,2,4-trienes,APPLIED ORGANOMETALLIC CHEMISTRY, Issue 7 2007Kotaro Kato Abstract Stereodefined synthesis of an unprecedented family of vinylgermanes bearing an allyl group, (E)-2-aryl-1-germylalka-1,4-dienes, or an allenyl group, (E)-4-aryl-5-germylpenta-1,2,4-trienes, via a cross-coupling reaction of (Z)-germyl(stannyl)ethenes with the respective allyl halide (Br, Cl) and propargyl bromide is described. In the reaction with allyl halides, either a Pd(dba)2,CuI combination (dba: dibenzylideneacetone) or CuI alone readily catalyzes or mediates the coupling reaction of (Z)-germyl(stannyl)ethenes, producing the novel vinylgermanes bearing an allyl group. The thienyl group or hydroxy group of the (Z)-germyl(stannyl)ethene survives the reaction. Copper(I) iodide alone readily mediates the reaction with allyl chloride or methallyl chloride upon addition of sodium bromide to produce the respective cross-coupled product in good yield. In contrast, crotyl halides (Br, Cl) or prenyl chloride couple with/without allylic transposition in the bromide or the chloride. In the reaction with propargyl bromide, a Pd(dba)2 and CuI combination efficiently drives the coupling reaction of (Z)-germyl(stannyl)ethenes in NMP (N -methylpyrrolidone), providing the stereochemically defined allenyl vinylgermanes, (E)-4-aryl-5-germylpenta-1,2,4-trienes, in good yields. Copyright © 2007 John Wiley & Sons, Ltd. [source] | ||||||||||