4666. d-manno-Heptulose

Nomenclature

CAS number: 3615-44-9
d-manno-Ketoheptose.
C7H14O7; mol wt 210.18.
C 40.00%, H 6.71%, O 53.29%.

Description and references

Isoln from the wet pulp of the fruit of the avocado tree, Persea gratissima Gaertn. f. (P. americana Mill.), Lauraceae: LaForge, J. Biol. Chem. 28, 511 (1917); Montgomery, Hudson, J. Am. Chem. Soc. 61, 1654 (1939); Richtmyer in Methods in Carbohydrate Chemistry R. L. Whistler et al., Eds. vol. 1, 173 (1962).

Chemical structure

Properties

Large, transparent prisms from methanol, mp 151-152°. [α]D20 +29° (c = 2 in H2O). Sol in water. Usually accompanied by perseitol. Although perseitol is much more insol in water and methanol than d-manno-heptulose, clean separation of the two substances is not always easy and may require patient fractional crystn.