alpha-Ergostenol

Title: a-Ergostenol
CAS Registry Number: 632-32-6
CAS Name: (3b,5a)-Ergost-8(14)-en-3-ol
Molecular Formula: C28H48O
Molecular Weight: 400.68
Percent Composition: C 83.93%, H 12.07%, O 3.99%
Literature References: Prepd by hydrogenation of ergosterol acetate in acetic acid soln: Hart et al., J. Am. Chem. Soc. 52, 2016 (1930); from 22-dihydroergosterol: Windaus, Langer, Ann. 508, 105 (1934).
Properties: Plates from methanol, mp 130-131°. [a]D16 +11° (c = 0.9 in methanol). [a]546 -10.2° (c = 1 in methanol). Precipitated by digitonin.
Melting point: mp 130-131°
Optical Rotation: [a]D16 +11° (c = 0.9 in methanol); [a]546 -10.2° (c = 1 in methanol)
Derivative Type: Acetate
Molecular Formula: C30H50O2
Molecular Weight: 442.72
Percent Composition: C 81.39%, H 11.38%, O 7.23%
Properties: mp 110°.
Melting point: mp 110°
Derivative Type: Benzoate
Molecular Formula: C35H52O2
Molecular Weight: 504.79
Percent Composition: C 83.28%, H 10.38%, O 6.34%
Properties: mp 118-120°.
Melting point: mp 118-120°
Derivative Type: Methyl ether
Molecular Formula: C29H50O
Molecular Weight: 414.71
Percent Composition: C 83.99%, H 12.15%, O 3.86%
Properties: mp 56°. [a]D20 +6.3° (in chloroform).
Melting point: mp 56°
Optical Rotation: [a]D20 +6.3° (in chloroform)
Status: This monograph has been retired and is no longer subject to revision or update.
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