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Bakers yeast-mediated transformations of alpha-keto epoxides

Author: Meth-Cohn, O ; Horak, RM ; Fouché, Gerda Date: 07 Jun 1994 Alpha beta-Epoxy ketones on treatment with baker's yeast yield different types of products depending on their substitution. Small groups such as H or Me attached at the epoxy end protect that end from attack. Thus, 1-acyl epoxides with H, ... Read more
Designer ligands. Part 15. Synthesis and characterisation of novel Mn(lI), Ni(II) and Zn(II) complexes of 1,10-phenanthroline-derived ligands

Author: Wellington, Kevin W ; Kaye, PT ; Watkins, GM Date: 2009 Series of manganese(II), nickel(II) and zinc(II) complexes have been prepared using 1,10-phenanthroline-derived ligands, and their coordination geometries have been assigned using infrared data. It is apparent that, depending on the ligand, ... Read more
Fast- and ultra-fast laser pulse induced reactions between carbon dioxide and methane

Author: Kotze, FJ ; Strydom, CA ; Du Plessis, A ; Dlamini, TL Date: Mar 2010 The direct excitation of CO2 using fast (nanosecond) and ultrafast (femtosecond) pulsed lasers was investigated. A gas reaction cell was used to excite CO2 in a 50 : 50 mixture of CO2 and CH4 using nano- and femtosecond laser systems, to ... Read more
Metathesis reactions for the synthesis of ring-fused carbazoles

Author: Pelly, SC ; Parkinson, CJ ; Van Otterlo, WAL ; De Koning, CB Date: 09 Dec 2005 The metathesis reaction is used as a key step for the synthesis of the indolo [2,3-a] carbazole core of rebeccamycin 13 and the sulfur analog of furostifoline 21. Using the same methodology for the attempted synthesis of furostifoline, the ... Read more
Novel baker's yeast catalysed hydride reduction of an epoxide moiety

Author: Horak, RM ; Learmonth, RA ; Maharaj, VJ Date: 27 Feb 1995 The preparation of 2-[2H]-l-(p-nitrophenyl)-1,2-epoxyheptan-3-one and its subsequent reduction by baker's yeast to the 2,3-diol is described. The mechanism of the reduction of the epoxide was determined using the B-2H isotope shift in 3C ... Read more
Palladium-catalysed arylation of acetoacetate esters to yield 2-arylacetic acid esters

Author: Zeevaart, JG ; Parkinson, CJ ; De Koning, CB Date: 24 May 2004 The coupling reaction between ethyl acetoacetate and a number of aryl halides in the presence of palladium acetate, a bulky and electron rich phosphine and K3PO4 is described. The arylated acetoacetate ester is de-acylated under the reaction ... Read more
Palladium-catalysed arylation of sulfonamide stabilised enolates

Author: Zeevaart, JG ; Parkinson, CJ ; De Koning, CB Date: 07 Mar 2005 Alpha-Arylation of inethanesulfonamides using palladium catalysis is described. For example, treatment of N-benzyl-Nmethylmethanesulfonamide with catalytic Pd (OAc) (2) in the presence of sodium tert-butoxide, triphenylphosphine and toluene ... Read more
Solid angles III. The role of conformers in solid angle calculations

Author: White, D ; Taverner, BC ; Coville, NJ ; Wade, PW Date: 14 Jun 1995 The values of the solid angles Omega for a range of commonly encountered ligands in organometallic chemistry (phosphines, phosphites, amines, arsines and cyclopentadienyl rings) have been determined. The solid angles were derived from a single ... Read more

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Browsing by Subject "Organic chemistry"

Browsing by Subject "Organic chemistry"

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