3246-27-3Relevant academic research and scientific papers
Kinetic resolution of 1,2-diols through highly site- and enantioselective catalytic silylation
Zhao, Yu,Mitra, Aurpon W.,Hoveyda, Amir H.,Snapper, Marc L.
, p. 8471 - 8474 (2008/09/18)
(Chemical Equation Presented) Resolved to silylate: A chiral silylation catalyst is used for kinetic resolution of three classes of acyclic 1,2-diols. The catalyst differentiates, with excellent precision, between the two hydroxy groups of a substrate. The majority of the diols, obtained in high enantiomeric purity, cannot be accessed with similar stereochemical purity through catalytic asymmetric dihydroxylation.
Process for preparing optically active 3-azidocarboxylic acid derivatives and 3-aminocarboxylic acid derivatives
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Page/Page column 9, (2008/06/13)
A process for enantioselectively preparing 3-azidocarboxylic acid derivatives comprises reacting 3-sulfonatocarboxylic acid derivatives with an alkali metal azide in a solvent selected from the group comprising certain carboxamides; a solvent mixture which comprises such carboxamides; a solvent mixture of water and a solvent miscible homogeneously with water; water with the proviso that the addition of a phase transfer catalyst is not used in the reaction in water; and DMSO. The resulting products are optionally reduced to 3-aminocarboxylic acid derivatives.
Peptide based inhibitors of interleukin-8: Structural simplification and enhanced potency
Attwood, Michael R.,Conway, Elizabeth A.,Dunsdon, Rachel M.,Greening, John R.,Handa, Balraj K.,Jones, Philip S.,Jordan, Steven C.,Keech, Elizabeth,Wilson, Francis X.
, p. 429 - 432 (2007/10/03)
Important areas of a lead peptide inhibitor of IL-8 had been previously identified. Chemical modification led to the identification of key amide bonds which allowed the replacement of the central section of the peptide with modified amino acids and spacers. This approach led to inhibitors of lower molecular weight and of increased potency.
Reactions of β-Lactones with Potassium Alkoxides and Their Complexes with 18-Crown-6 in Aprotic Solvents
Kurcok, Piotr,Jedlinski, Zbigniew,Kowalczuk, Marek
, p. 4219 - 4220 (2007/10/02)
The mechanism of the reaction of β-lactones (2-oxetanones) with potassium alkoxides in aprotic solvents was investigated.Despite previous suggestions, the attack of alkoxide ion occurs on the carbonyl carbon atom of β-lactones, cleaving the acyl-oxygen bond to yield the corresponding potassium alcoholate of the respective β-hydroxycarboxylic acid ester.Next, the unsaturated ester is formed due to potassium hydroxide elimination.The nature of the alkoxide used and complexation of alkali metal cation by crown ether have no significant effect on the reaction course in aprotic solvents.
A Mild and Efficient Alumina-Promoted Synthesis of t-Butyl Esters
Nagasawa, Kazuo,Yoshitake, Shinji,Amiya, Takao,Ito, Keiichi
, p. 2033 - 2040 (2007/10/02)
A wide variety of aliphatic acid chlorides including an optically active one has been efficiently converted to their t-butyl esters under very mild reaction conditions by employing activated alumina as a catalyst.
