The non-natural enantiomer of polyoxamic acid (1) and 3,4-diepipolyoxamic acid (2) was synthesized in four steps from D-lyxono-1,4-lactone (4). Regioselective bromination of unprotected D-lyxono-1,4-lactone with HBr/AcOH led to 2-bromo-2-deoxy-D-xylono-1,4-lactone (5). This intermediate was treated with NaN3 to give 2-azido-2-deoxy-D-lyxono and xylono-1,4-lactones. Saponification of the obtained 2-azido derivatives gave the corresponding 2-azido-2-deoxyaldonic acids salt which, after neutralization followed by reduction, led to the expected compounds: (-)-polyoxamic acid (3) and 3,4-diepipolyoxamic acid (2) in 38% and 29% overall yields. (C) 2008 Elsevier Ltd. All rights reserved.
BOLS, MIKAEL;LUNDT, INGE, ACTA CHEM. SCAND., 42,(1988) N 2, 67-74
作者:BOLS, MIKAEL、LUNDT, INGE
DOI:——
日期:——
Structural essentials for β-N-acetylhexosaminidase inhibition by amides of prolines, pipecolic and azetidine carboxylic acids
作者:A. F. G. Glawar、R. F. Martínez、B. J. Ayers、M. A. Hollas、N. Ngo、S. Nakagawa、A. Kato、T. D. Butters、G. W. J. Fleet、S. F. Jenkinson
DOI:10.1039/c6ob01549b
日期:——
design and synthesis of β-N-acetylhexosaminidase inhibitors along with their applicability to human disease treatment through biological evaluation in both an enzymatic and cellular setting. We investigated the importance of individual stereocenters, variations in structure–activityrelationships along with factors influencing cell penetration. To achieve these goals we modified nitrogen heterocycles