Allopregnane-3beta,17alpha,21-triol-11,20-dione

Title: Allopregnane-3b,17a,21-triol-11,20-dione
CAS Registry Number: 516-45-0
CAS Name: 3b,17,21-Trihydroxy-5a-pregnane-11,20-dione
Additional Names: 3b,17,21-trihydroxy-11,20-dioxo-5a-pregnane; 17-(1-keto-2-hydroxyethyl)androstane-3,17-diol-11-one; Kendall's compound G; Reichstein's substance D; Wintersteiner's compound B
Molecular Formula: C21H32O5
Molecular Weight: 364.48
Percent Composition: C 69.20%, H 8.85%, O 21.95%
Literature References: Occurs in adrenal cortex: Kuizenga, Cartland, Endocrinology 24, 526 (1939); von Euw, Reichstein, Helv. Chim. Acta 25, 988 (1942); 41, 1516 (1958). Prepn by reduction of allopregnane-17a,21-diol-3,11,20-trione: Kaufmann, Pataki, Experientia 7, 260 (1951); from 5a-pregnan-3b-ol-11,20-dione: Chamberlin, Chemerda, J. Am. Chem. Soc. 77, 1221 (1955).
Properties: Crystals from abs alc, mp 238-242°. [a]D20 +61.8° (c = 1.07 in dioxane).
Melting point: mp 238-242°
Optical Rotation: [a]D20 +61.8° (c = 1.07 in dioxane)
Derivative Type: 3,21-Diacetate
Molecular Formula: C25H36O7
Molecular Weight: 448.55
Percent Composition: C 66.94%, H 8.09%, O 24.97%
Properties: Crystals, mp 223-224°. [a]D20 +72.3° (dioxane).
Melting point: mp 223-224°
Optical Rotation: [a]D20 +72.3° (dioxane)
Status: This monograph has been retired and is no longer subject to revision or update.
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