128683-43-2

Basic information

• Product Name: 2-methyl-6-(5-acetamido-3,5-dideoxy-alpha-glycero-galacto-nonulopyranosylonic acid)xanthene-9-spiro-1'-isobenzofuran-3'-one
• Synonyms: 2-methyl-6-(5-acetamido-3,5-dideoxy-alpha-glycero-galacto-nonulopyranosylonic acid)xanthene-9-spiro-1'-isobenzofuran-3'-one
• CAS NO: 128683-43-2
• Molecular Formula: C₃₂H₃₁NO₁₂
• Molecular Weight: 621.58804
• Mol File: 128683-43-2.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 1029.1°Cat760mmHg
• Flash Point: 576.2°C
• Appearance: /
• Density: 1.59g/cm³
• CAS DataBase Reference: 2-methyl-6-(5-acetamido-3,5-dideoxy-alpha-glycero-galacto-nonulopyranosylonic acid)xanthene-9-spiro-1'-isobenzofuran-3'-one(CAS DataBase Reference)
• NIST Chemistry Reference: 2-methyl-6-(5-acetamido-3,5-dideoxy-alpha-glycero-galacto-nonulopyranosylonic acid)xanthene-9-spiro-1'-isobenzofuran-3'-one(128683-43-2)
• EPA Substance Registry System: 2-methyl-6-(5-acetamido-3,5-dideoxy-alpha-glycero-galacto-nonulopyranosylonic acid)xanthene-9-spiro-1'-isobenzofuran-3'-one(128683-43-2)

Safety Data

• Hazardous Substances Data: 128683-43-2(Hazardous Substances Data)

Upstream product

• 83469-76-5 6-Hydroxy-2-methylxanthen-9-spiro-1'-isobenzofuran-3'-one 
• 128678-39-7 2-Methyl-6-xanthene-9-spiro-1'-isobenzofuran-3'-one 
• 5493-87-8 2-(2-hydroxy-5-methyl-benzoyl)-benzoic acid 
• 106-44-5 p-cresol 
• 85-44-9 phthalic anhydride 

Relevant articles and documents

PHASE-TRANSFER-CATALYZED SYNTHESIS OF ARYL α-KETOSIDES OF N-ACETYLNEURAMINIC ACID. A 2-METHYLFLUORAN-6-YL GLYCOSIDE OF N-ACETYLNEURAMINIC ACID, 2-METHYL-6-(5-ACETAMIDO-3,5-DIDEOXY-α-D-glycero-D-galacto-NONULOPYRANOSYLONIC ACID)XANTHENE-9-SPIRO-1'-ISOBENZOFURAN-3'-ONE, A NEW SUBSTRATE..

Glycosidation of N-acetylneuraminic acid by phase-transfer catalysis in chloroform-aqueous alkali gave several known and some new aryl α-ketosides in a short reaction time and in good yields.The 4-methylumbelliferyl α-ketoside, the standard substrate for neuraminidase, was prepared in a yield of up to 70percent.New Neu5Ac ketosides were prepared with fluorescein and the fluorescein analog, 2-methyl-6-hydroxyfluoran (2-methyl-6-hydroxyxanthene-9-spiro-1'-isobenzofuran-3'-one) as aglycons, the latter being synthesized from 2-(2-hydroxy-5-methylbenzoyl) benzoic acid and 3-fluorophenol.The α configuration was ascertained by 400-MHz 1H-NMR spectroscopy and by cleavage of the ketosides with neuraminidases from Vibrio cholerae and Clostridium perfringens.The enzymic hydrolysis of the 2-methylfluoran-6-yl ketoside gave Km values of 82 μM (V. cholerae) and 96 μM (C. perfringens).