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CAS No 651-43-4 , Pregnan-20-one,3,11,17,21-tetrahydroxy-, (3b,5a,11b)-

  • Name: Pregnan-20-one,3,11,17,21-tetrahydroxy-, (3b,5a,11b)-
  • Synonyms: 5a-Pregnan-20-one, 3b,11b,17,21-tetrahydroxy- (8CI); 3b,11b,17,21-Tetrahydroxy-5a-pregnan-20-one;Pregnan-20-one,3,11,17,21-tetrahydroxy-, (3b,5a,11b)-; Reichstein's substance V; 3b,5a-Tetrahydrocortisol; 3b-Allotetrahydrocortisol;
  • CAS Registry Number:
  • Flash Point: 297.6°C
  • Boiling Point: 545.1°C at 760 mmHg
  • Density: 1.253g/cm3
  • Refractive index: 1.579
  • Flash Point: 297.6°C
  • Molecular Weight: 366.49
  • InChI: InChI=1/C21H34O5/c1-19-7-5-13(23)9-12(19)3-4-14-15-6-8-21(26,17(25)11-22)20(15,2)10-16(24)18(14)19/h12-16,18,22-24,26H,3-11H2,1-2H3/t12-,13-,14-,15-,16-,18+,19-,20-,21-/m0/s1
  • Molecular Formula: C21H34 O5
  • Molecular Structure:CAS No:651-43-4 Pregnan-20-one,3,11,17,21-tetrahydroxy-, (3b,5a,11b)-

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651-43-4 Allotetrahydrocortisol

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651-43-4 ALLOTETRAHYDROCORTISOL

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References of Pregnan-20-one,3,11,17,21-tetrahydroxy-, (3b,5a,11b)-
Title: Allopregnane-3b,11b,17a,21-tetrol-20-one
CAS Registry Number: 651-43-4
CAS Name: 3b,11b,17,21-Tetrahydroxy-5a-pregnan-20-one
Synonyms: 3b,11b,17,21-tetrahydroxy-20-oxo-5a-pregnane; Reichstein's substance V
Molecular Formula: C21H34O5
Molecular Weight: 366.49
Percent Composition: C 68.82%, H 9.35%, O 21.83%
Literature References: Isoln from adrenal cortex: von Euw, Reichstein, Helv. Chim. Acta 25, 988 (1942). Prepn from 5a-pregnan-3b-ol-11,20-dione: Chamberlin, Chemerda, J. Am. Chem. Soc. 77, 1221 (1955); by hydrogenation of cortisol with rhodium: Caspi, J. Org. Chem. 24, 669 (1959); from bismethylenedioxyhydrocortisone: Fukushima, Daum, ibid. 26, 520 (1961).
Properties: Needles from dilute methanol, decomp 220-225°. [a]D13 +50.7° (c = 0.8672 in dioxane).
Optical Rotation: [a]D13 +50.7° (c = 0.8672 in dioxane)
 
Derivative Type: 3,21-Diacetate
Molecular Formula: C25H38O7
Molecular Weight: 450.57
Percent Composition: C 66.64%, H 8.50%, O 24.86%
Properties: Flat prisms from acetone-ether, decomp 225-227°. [a]D18 +62.6° (c = 1.101 in dioxane).
Optical Rotation: [a]D18 +62.6° (c = 1.101 in dioxane)
 
 
Status: This monograph has been retired and is no longer subject to revision or update.