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Design and synthesis of substrate-mimic inhibitors of mycothiol-S-conjugate amidase from Mycobacterium tuberculosis
Metaferia, Belhu B.,Ray, Satyajit,Smith, Jeremy A.,Bewley, Carole A.
, p. 444 - 447 (2007)
The Staudinger reaction between a polymer-supported triphenylphosphine reagent and pseudo-disaccharide azides is successfully applied to synthesize a variety of substrate-mimic mycothiol analogs. Screening of this new group of analogs against the mycobacterial detoxification enzyme mycothiol-S-conjugate amidase (MCA) yielded several modest inhibitors (IC50 values around 50 μM) and provided additional structure-activity relationships for future optimization of inhibitors of MCA and its homologs.
3,4,6-Tri-O-acetyl-1,2-O-[1-(exo-ethoxy)ethyl-idene]-Β-d-manno- pyranose 0.11-hydrate
Liu, Ya-Ling,Zou, Pei,Wu, Hao,Xie, Min-Hao,Luo, Shi-Neng
, p. o338-o340 (2012/11/13)
The title compound, C16H24O10·0. 11H2O, is a key inter-mediate in the synthesis of 2-de-oxy-2-[ 18F]fluoro-d-glucose (18F-FDG), which is the most widely used mol-ecular-imaging probe for positron emission tomography (PET). The crystal structure has two independent mol-ecules (A and B) in the asymmetric unit, with closely comparable geometries. The pyran-ose ring adopts a 4 C 1 conformation [Cremer-Pople puckering parameters: Q = 0.553 (2) A?, = 16.2 (2)° and = 290.4 (8)° for mol-ecule A, and Q = 0.529 (2) A?, =15.3 (3)° and = 268.2 (9)° for mol-ecule B], and the dioxolane ring adopts an envelope conformation. The chiral centre in the dioxolane ring, introduced during the synthesis of the compound, has an R configuration, with the eth-oxy group exo to the manno-pyran-ose ring. The asymmetric unit also contains one water mol-ecule with a refined site-occupancy factor of 0.222 (8), which bridges between mol-ecules A and B via O - H?O hydrogen bonds.
Synthesis of the positron-emitting radiotracer [18F]-2-fluoro-2- deoxy-d-glucose from resin-bound perfluoroalkylsulfonates
Brown, Lynda J.,Ma, Nianchun,Bouvet, Denis R.,Champion, Sue,Gibson, Alex M.,Hu, Yulai,Jackson, Alex,Khan, Imtiaz,Millot, Nicolas,Topley, Amy C.,Wadsworth, Harry,Wynn, Duncan,Brown, Richard C. D.
scheme or table, p. 564 - 575 (2009/07/18)
A new approach to the synthesis of 2-fluoro-2-deoxy-d-glucose (FDG, [ 19/18F]-3) is described, which employs supported perfluoroalkylsulfonate precursors 33-36, where the support consists of insoluble polystyrene resin beads. Treatment of these resins with [ 19F]fluoride ion afforded protected FDG [19F]-18 as the major product, and the identities of the main byproducts were determined. Acidic removal of the acetal protecting groups from [19F]-18 was shown to produce [19F]FDG. The method has been applied to the efficient radiosynthesis of the imaging agent [18F]FDG, and was shown to produce the radiochemical tracer in good radiochemical yield (average 73%, decay corrected). The Royal Society of Chemistry 2009.