L-Fucose
Title: L-Fucose
CAS Registry Number: 2438-80-4
CAS Name: 6-Deoxy-L-galactose
Additional Names: L-galactomethylose
Molecular Formula: C6H12O5
Molecular Weight: 164.16
Percent Composition: C 43.90%, H 7.37%, O 48.73%
Literature References: Occurs in seaweed: Ascophyllum nodosum (L.) Ledol. (Fucus nodosus L.), Fucus vesiculosus L., F. serratus L., F. virsoides (Don) J. Ag., Fucaceae, and in gum tragacanth. Isoln from seaweed: Clark, J. Biol. Chem. 54, 65 (1922); Hockett et al., J. Am. Chem. Soc. 61, 1658 (1939). Manuf from fucoidan: Schweiger, US 3240775 (1966 to Kelco). Synthesis from D-galactose: Dejterjuszynski, Flowers, Carbohydr. Res. 28, 144 (1973); from D-glucose: T. Chiba, S. Tejima, Chem. Pharm. Bull. 27, 2838 (1979); from D-mannose: J. Defaye et al., Carbohydr. Res. 94, 131 (1981). Review of chemistry and biochemistry: H. M. Flowers, Adv. Carbohydr. Chem. Biochem. 39, 279-345 (1981).
 
Derivative Type: a-Form
Properties: Minute needles from abs alcohol, mp 140°. Shows mutarotation. [a]D20 -124.1° (10 min) ® -108.0° (20 min) ® -91.5° (36 min) ® -78.6° (70 min) ® -75.6° (final value, 24 hrs, c = 9). Soluble in water and alcohol.
Melting point: mp 140°
Optical Rotation: [a]D20 -124.1° (10 min) ® -108.0° (20 min) ® -91.5° (36 min) ® -78.6° (70 min) ® -75.6° (final value, 24 hrs, c = 9)

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