18668-00-3Relevant articles and documents
Vancomycin binding to low-affinity ligands: Delineating a minimum set of interactions necessary for high-affinity binding
Loll, Patrick J.,Kaplan, Jeffrey,Selinsky, Barry S.,Axelsen, Paul H.
, p. 4714 - 4719 (1999)
Bacterial resistance to vancomycin has been attributed to the loss of an intermolecular hydrogen bond between vancomycin and its peptidoglycan target when cell wall biosynthesis proceeds via depsipeptide intermediates rather than the usual polypeptide int
Stereoisomeric lactoyl β methylcholine iodides. Interaction with cholinesterase and acetylcholinesterase
Chan,Robinson
, p. 1057 - 1060 (1974)
The preparation and absolute configuration of the stereoisomeric forms of lactoyl β methylcholine iodide with the 2 racemic forms of the molecule are reported. None of the stereoisomers were substrates for the enzyme acetylcholinesterase, whereas two stereoisomers (L lactoyl β methylcholine and D lactoyl L β methylcholine iodide) were poor substrates for cholinesterase. Results are analyzed in the light of previous studies of the chiral requirements of these 2 enzymes and an attempt is made to define the rate limiting or prohibited step in the enzyme catalyzed reaction with these compounds.
A simple procedure for the synthesis of enantiopure α-acetoxy ketones
Babudri, Francesco,Fiandanese, Vito,Marchese, Giuseppe,Punzi, Angela
, p. 2431 - 2440 (1999)
Cross-coupling reactions of α-acetoxy carboxylic acid chlorides with organocopper reagents, derived from Grignard reagents, cuprous bromide and lithium bromide, provide a simple and straightforward method for the synthesis of enantiopure α-acetoxy ketones.
Total Synthesis of (+)-Prunustatin A: Utility of Organotrifluoroborate-Mediated Prenylation and Shiina MNBA Esterification and Macrolactonization to Avoid a Competing Thorpe-Ingold Effect Accelerated Transesterification
Chojnacka, Maja W.,Batey, Robert A.
supporting information, p. 5671 - 5675 (2018/09/13)
A convergent total synthesis of (+)-prunustatin A is described through the assembly of two key fragments and a macrolactonization. Shiina MNBA couplings were used for the formation of each of the four ester bonds in the tetralactone ring, including the key macrocyclization which was essential to minimize competing Thorpe-Ingold accelerated transesterification. Other key steps included an organoboron-based prenylation using potassium prenyltrifluoroborate and a carbonyldiimidazole-mediated coupling to form the salicylamide.
Preparation method and application of 2-lactoyl aminobenzoic acid
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Paragraph 0037; 0038, (2017/08/30)
The invention relates to a new medicinal application of a chiral compound. The chiral compound is chemically named as R-/S-2-lactoyl aminobenzoic acid and has a structural formula as follows: formula (shown in the description). The compound is initially extracted and separated from secondary metabolite of microorganisms and can be obtained by virtue of a chemical synthetic method. An initial pharmacology experiment shows that the compound has good pain-easing and anti-inflammation activities and relatively low stimulation to gastrointestinal tracts. Recent researches prove that the compound has relatively good anti-platelet aggregation and anti-thrombus activities and is expected to be a novel non-steroidal anti-platelet aggregation and anti-thrombus drug.