9004. Suprasterol II

Nomenclature

CAS number: 562-71-0
(2α,7α,8R,19α,22E)-7,19:8,19-Dicyclo-9,10-secoergosta-5(10),22-dien-2-ol.
C28H44O; mol wt 396.65.
C 84.78%, H 11.18%, O 4.03%.

Description and references

Ultraviolet irradiation product of vitamin D2. Isoln: Windaus et al., Ann. 483, 17 (1930). Structure and stereochemistry: Dauben, Baumann, Tetrahedron Lett. 1961, 565. Crystal structure: C. P. Saunderson et al., ibid. 573. Improved isoln and spectral data: T. Kobayashi et al., J. Nutr. Sci. Vitaminol. 23, 291 (1977).

Chemical structure

Properties

Rough prisms from acetone or methanol, mp 110°. bp0.005 190°. [α]D19 +62.9° (methanol); [α]D22 +47.8° (methanol). Sol in all organic solvents.