Title: Allopregnan-20b-ol-3-one
CAS Registry Number: 516-58-5
CAS Name: (5a,20R)-20-Hydroxypregnan-3-one
Additional Names: 20b-hydroxy-5a-pregnan-3-one; 20b-hydroxy-3-oxo-5a-pregnane
Molecular Formula: C21H34O2
Molecular Weight: 318.49
Percent Composition: C 79.19%, H 10.76%, O 10.05%
Literature References: Prepn from allopregnane-3b,20b-diol-3-acetate: Rubin et al., J. Am. Chem. Soc. 73, 2338 (1951); from isofuntumidine: Janot et al., Bull. Soc. Chim. Fr. 1960, 1669.
Properties: Crystals from heptane, mp 185°. [a]D +20° (c = 1.2 in chloroform).
Melting point: mp 185°
Optical Rotation: [a]D +20° (c = 1.2 in chloroform)
Derivative Type: Acetate
Molecular Formula: C23H36O3
Molecular Weight: 360.53
Percent Composition: C 76.62%, H 10.06%, O 13.31%
Properties: Crystals from ethanol, mp 148°. [a]D +57° (c = 1.9 in chloroform).
Melting point: mp 148°
Optical Rotation: [a]D +57° (c = 1.9 in chloroform)