Potassium Hydroxide → Galeterone

HRID 254185Notes

Reaction equation

HRID 254185 reaction equation
C([O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C:7](=[CH:8][CH2:9][C@@H:10]3[C@@H:19]2[CH2:18][CH2:17][C@@:15]2([CH3:16])[C@H:11]3[CH2:12][CH:13]=[C:14]2[N:24]2[C:28]3[CH:29]=[CH:30][CH:31]=[CH:32][C:27]=3[N:26]=[CH:25]2)[CH2:6]1)(=O)C.[OH-].[K+]>CO>[OH:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C:7](=[CH:8][CH2:9][C@@H:10]3[C@@H:19]2[CH2:18][CH2:17][C@@:15]2([CH3:16])[C@H:11]3[CH2:12][CH:13]=[C:14]2[N:24]2[C:28]3[CH:29]=[CH:30][CH:31]=[CH:32][C:27]=3[N:26]=[CH:25]2)[CH2:6]1

Participants

4

Reactant 2

HCID 14797Potassium HydroxideHCID 11464592(3S,8R,9S,10R,13S,14S)-17-(1H-Benzo[D]imidazol-1-YL)-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[A]phenanthren-3-YL acetate

Product 1

HCID 11188409GaleteroneYield 94%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

The acetate 4 (1.3 g 3.02 mmol) was dissolved in methanol (20 mL) under an inert Ar atmosphere, and the resulting solution treated with 10% methanolic KOH (8 mL). The mixture was stirred at room temperature for 1.5 h, and then concentrated under reduced pressure at approx. 40° C. to a volume of 10 mL. This solution was poured into ice water (300 mL), and the resulting white precipitate was filtered, washed with water and dried. Crystallization from EtOAc/MeOH gave 5 (1.10 g, 94%), mp 189-190° C.; IR(CHCl3) 2934, 2339, 1609, 1490, 1453, 1291, 1040, 837, 808, 705, 663, 608, 578, 550, 517 cm−1; 1H NMR (300 MHz, CDCl3) δ 1.02 (s, 3H, 18-CH3), 1.07 (s, 3H, 19-CH3), 3.55 (m, 1H, 3α-H), 5.41 (br s, 1H, 6-H), 5.99 (s, 1H, 16-H), 7.30 (m, 2H, aromatic-Hs), 7.54 (s, 1H, aromatic-H), 7.80 (s, 1H, aromatic-H), and 7.96 (s, 1H, 21-H). HRMS calcd 411.2407 (C26H32ON2.Na+). found 411.2396.

Workup

  1. concentrationconcentrated under reduced pressure at approx. 40° C. to a volume of 10 mL
  2. additionThis solution was poured into ice water (300 mL)
  3. filtrationthe resulting white precipitate was filtered
  4. washwashed with water
  5. customdried
  6. customCrystallization from EtOAc/MeOH

Sources & evidence

ORD record
ord-28794f7a4fbb400890dda0a9a37e9953
Source dataset
uspto-grants-2011_01
Patent number
US07875599B2

Reaction notes

Loading…