chemistry a carbenoid is a reactive intermediate that shares reaction characteristics with a carbene. In the Simmons–Smith reaction the carbenoid intermediate...
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Simmons–Smith reaction is an organic cheletropic reaction involving an organozinc carbenoid that reacts with an alkene (or alkyne) to form a cyclopropane. It is named...
27 KB (2,894 words) - 14:32, 19 August 2024
1968 Ryōji Noyori developed a copper-Schiff base complex for the metal-carbenoid cyclopropanation of styrene. Schiff bases have also been incorporated...
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proposals generally invoke organozinc intermediates, sometimes including zinc carbenoids, either as discrete species or as organic fragments bound to the zinc...
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the contraction. The standard intermediates are anionic, cationic, and carbenoid. The Favorskii rearrangement is a classic anionic ring contraction. It...
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used in a stabilised form, referred to as a carbenoid. In the Simmons–Smith reaction the reactive carbenoid is iodomethylzinc iodide, which is typically...
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warming and to carbenoids by treatment with a Rh(II) or Cu(II) salt such as Rh2(OAc)4 or CuCl2. The transition-metal-derived carbenoids, which have a metal ––...
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aziridines. Several cycloadditions wherein the ylide serves as a "nucleophilic carbenoid equivalent" have been reported. Living polymerizations using trialkylboranes...
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Metal-catalyzed cyclopropanations (redirect from Intermolecular metal-catalysed carbenoid cyclopropanations)
cyclopropane ring from a metal carbenoid species and an alkene. In the Simmons–Smith reaction the metal involved is zinc. Metal carbenoid species can be generated...
11 KB (1,251 words) - 20:49, 22 July 2024
reactions, this began with the very first application of BOX ligands in carbenoid cyclopropanations and has been expanded to include 1,3-Dipolar cycloaddition...
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trapping Radical Carbene Carbocation Carbanion Carbyne Benzyne (an aryne) Carbenoid Ion-neutral complex Keto anions Nitrenes Oxocarbenium ions Phosphinidenes...
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Treatment of diazoimide 64 with rhodium(II) acetate dimer generated a carbenoid that yielded reactive ylide 65 after an intramolecular cyclization with...
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DDT-derived vinylidene complex Fe(TPP)C2(C6H4Cl)2, one of several iron carbenoid complexes prepared by Mansuy (TPP = conjugate base of tetraphenylporphyrin)...
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could be effectively prepared from a decarbonylative process of a metal carbenoid derived from a stabilized diazo compound. The carbene carbon of a Fischer...
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characterization of stable ruthenium-carbenoid complexes and rhodium metallocarbenes, involves an initial formation of a metal-carbenoid complex from the diazo compound...
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Li, Jianfeng; Main, Calver A.; McKiernan, Gordon J. (2007). "Titanium carbenoid reagents for converting carbonyl groups into alkenes". Tetrahedron. 63...
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1999). "Asymmetric Total Synthesis of (+)-Codeine via Intramolecular Carbenoid Insertion". The Journal of Organic Chemistry. 64 (21): 7871–7884. doi:10...
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corresponding alcohols with base and hydrogen peroxide (for an example see: carbenoid) In boronic ester homologization an alkyl group shifts from boron in a...
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and sometimes π-donor metal ligands hydrogen and alkyl substituents on carbenoid carbon. Examples include ((CH3)3CCH2)Ta=CHC(CH3)3 and Os(PPh3)2(NO)Cl(=CH2)...
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of a peroxide Cyclopropanation cyclopropanes addition of carbenes or carbenoids Hydroacylation ketones oxidative addition / reductive elimination by metal...
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Structure of Fe(TPP)C2(C6H4Cl)2, one of several iron carbenoid complexes prepared by Mansuy (TPP = conjugate base of tetraphenylporphyrin)....
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complex using a chiral Schiff base ligand, which he used for the metal–carbenoid cyclopropanation of styrene. In common with Knowles' findings, Noyori's...
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organolead compounds Silylenes, the carbene counterparts Silylenoids, the carbenoid counterparts Decamethylsilicocene Muller, Richard (January 1965). "One...
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highly explosive nature of diazoacetic esters. Preparation of the metal carbenoid: Synthesis of the carbene in the 1960s was focused on using copper catalysts...
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Doering–LaFlamme allene synthesis with enantiopure cyclopropylmagnesium carbenoids". Tetrahedron Letters. 52 (23): 3016–3019. doi:10.1016/j.tetlet.2011.03...
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imido ligands. Grubbs catalysts, on the other hand, are ruthenium(II) carbenoid complexes. Many variations of Grubbs catalysts are known. Some have been...
39 KB (4,096 words) - 05:27, 16 January 2024
1999). "Asymmetric Total Synthesis of (+)-Codeine via Intramolecular Carbenoid Insertion". The Journal of Organic Chemistry. 64 (21): 7871–7884. doi:10...
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Carbene dimerization is a type of organic reaction in which two carbene or carbenoid precursors react in a formal dimerization to an alkene. This reaction...
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enantioselective cyclopropanation of fluoro-substituted allylic alcohols using zinc carbenoids. Fluoroalkanes Fluorocyclohexane Kerr, J. A.; Kirk, A. W.; O'Grady, B...
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thionocarbonate and trialkylphosphite either form a phosphorus ylide or carbenoid intermediate. The reaction is stereospecific for most substrates unless...
55 KB (5,643 words) - 02:35, 23 August 2024