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Allyl Halides (allyl + halide)
Selected AbstractsChemInform Abstract: Pd(II)-Catalyzed Coupling-Cyclization Reaction of o-Ethynylphenylphosphonamides Monoesters with Allyl Halide.CHEMINFORM, Issue 12 2009Wei Tang 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Generation of Allyl Grignard Reagents via Titanocene-Catalyzed Activation of Allyl Halides.CHEMINFORM, Issue 34 2010Lauren M. Fleury Abstract The conditions avoid the formation of Wuertz-coupling by-products. [source] ChemInform Abstract: A Facile Generation of C,S Bonds via One-Pot, Odorless and Efficient Thia-Michael Addition Reactions Using Alkyl, Aryl or Allyl Halides, Thiourea and Electron-Deficient Alkenes in Wet Polyethylene Glycol (PEG 200) under Mild Reaction Conditions.CHEMINFORM, Issue 44 2009Habib Firouzabadi 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Stereospecific Synthesis of a Family of Novel (E)-2-Aryl-1-silylalka-1,4-dienes (III) or (E)-4-Aryl-5-silylpenta-1,2,4-trienes (VI) via a Cross-Coupling of (Z)-Silyl-(stannyl)ethenes with Allyl Halides or Propargyl Bromide.CHEMINFORM, Issue 29 2008Fumio Sasaki 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Regioselectivity in Coupling of Allyl Halides with Copper Acetylene Complexes.CHEMINFORM, Issue 35 2001E. D. Matveeva Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [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] Allylation of aldiminomercaptotriazinones using allyl halides and allylmetal compoundsHETEROATOM CHEMISTRY, Issue 3 2003Ashraf A. El-Shehawy Allylation of 4-amino-3-mercapto-6-methyl-4H -1,2,4-triazin-5-one (1) and its arylideneamino derivatives 5 was performed through two different methods. Reaction of 1 and 5 with allylic bromides 2 in the presence of sodium ethoxide afforded a mixture of S - and N -allylated products. Treatment of arylimines 5 with allylic zinc bromides 9 and triallylborane reagents 12 did not affect the hetero-ring opening but the CN bond of the lateral chain underwent the addition reaction yielding the C -allylated products 10. © 2003 Wiley Periodicals, Inc. Heteroatom Chem 14:280,287, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10144 [source] Direct Preparation of 7-Allyl- and 7-ArylindolinesADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 16 2009Daniele Leonori Abstract Addition of allyl halides to the organolithium species derived from lithiation of N - tert -butoxycarbonylindoline with sec -butyllithium (sec -BuLi) and tetramethylethylenediamine (TMEDA) occurs regioselectively by SN2 allylation. In contrast, the organolithium species can be transmetalated to the mixed zinc cuprate that undergoes regioselective SN2, allylations. Transmetalation to the organozinc chloride allows a Negishi-type cross-coupling reaction with aryl bromides using palladium catalysis with triphenylphosphine (PPh3) as ligand. The chemistry was applied to a very short synthesis of 7-prenylindole and of the alkaloid vasconine. [source] Mild and Efficient Allylation of Aldehydes by using Copper Fluorapatite as CatalystADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 10 2008M. Lakshmi Kantam Abstract A facile synthesis of homoallylic alcohols is achieved by the allylation of aldehydes with allylic metal reagents or allyl halides using copper fluorapatite (CuFAP) as catalyst under mild reaction conditions. A variety of aldehydes were converted to the corresponding homoallylic alchohols, demonstrating the versatility of the reaction. [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] | ||||||||||