Epicholesterol

Title: Epicholesterol
CAS Registry Number: 474-77-1
CAS Name: (3a)-Cholest-5-en-3-ol
Molecular Formula: C27H46O
Molecular Weight: 386.65
Percent Composition: C 83.87%, H 11.99%, O 4.14%
Literature References: The 3a-hydroxy epimer of cholesterol. Prepd from 8-oxocholesteryl chloride or from cholest-5-en-3-one or by passing O2 into a soln of cholesteryl Mg chloride: Ruzicka, Goldberg, Helv. Chim. Acta 19, 1407 (1936); Marker, et al., J. Am. Chem. Soc. 58, 481 (1936); Marker, US 2117355 (1938); Barnett et al., J. Chem. Soc. 1940, 1390.
Properties: Crystals from alcohol, mp 141.5°. [a]D30 -35° (c = 1 in alcohol). Not precipited by digitonin.
Melting point: mp 141.5°
Optical Rotation: [a]D30 -35° (c = 1 in alcohol)
Derivative Type: Acetate
Molecular Formula: C29H48O2
Molecular Weight: 428.69
Percent Composition: C 81.25%, H 11.29%, O 7.46%
Properties: Crystals from methanol, mp 85°.
Melting point: mp 85°
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