Structural Formula Vector Image
Title: D-Psicose
CAS Registry Number: 551-68-8
Additional Names: D-ribo-2-Ketohexose; D-ribohexulose; D-allulose; D-erythrohexulose; pseudofructose
Molecular Formula: C6H12O6
Molecular Weight: 180.16
Percent Composition: C 40.00%, H 6.71%, O 53.28%
Literature References: Occurrence and identification as a non-fermentable substance in cane molasses: Zerban, Sattler, Ind. Eng. Chem. 34, 1180 (1942). Structure: Ohle, Just, Ber. 68, 601 (1935). Prepn starting with D-ribono-g-lactone: Wolfrom et al., J. Am. Chem. Soc. 67, 1793 (1945); from D-allose: Steiger, Reichstein, Helv. Chim. Acta 19, 184 (1937); from D-glucose: Hough et al., J. Chem. Soc. 1953, 2005.
Properties: Sweet syrupy liquid. [a]D25 +4.7° (c = 4.3 in water; no detectable mutarotation). Soluble in water, methanol, ethanol. Practically insol in acetone.
Optical Rotation: [a]D25 +4.7° (c = 4.3 in water; no detectable mutarotation)
Derivative Type: Phenylosazone
Molecular Formula: C18H22N4O4
Molecular Weight: 358.39
Percent Composition: C 60.32%, H 6.19%, N 15.63%, O 17.86%
Properties: Yellow crystals from water, mp about 162-163° (dec); also reported mp 178°.
Melting point: mp about 162-163° (dec); mp 178°

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