title: [Structure of chromogen I of the Morgan-Elson reaction].
abstract: Alkaline treatment of 2-acetamido-2-deoxy-3,4:5,6-di-O-isopropylidene-aldehydo-D-glucose, or of the analogous D-mannose derivative, gave the same crystalline material, unambiguously identified as 2-acetamido-2,3-dideoxy-alpha-D-erythro-hex-2-enofuranose (3) by n.m.r. and mass spectrometry, and crystallography. Treatment of 3 with methanol in acidic medium gave methyl 2-acetamido-2,3-dideoxy-alpha,beta-D-erythro-hex-2-enofuranoside (11). The identical compound was obtained from Chromogen I under identical conditions.
mesh_terms: D003124:Colorimetry / Q000379:methods; D006595:Hexosamines / Q000032:analysis*; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry
chemical_list: D006595:Hexosamines; D007202:Indicators and Reagents
vernacular_title: Structure du chromogène I de la réaction de Morgan-Elson