Sodium Bicarbonate → [(3S,8R,9S,10R,13S,14S)-7-methoxy-10,13-dimethyl-17-oxo-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-yl] acetate

HRID 551836Notes

Reaction equation

HRID 551836 reaction equation
[C:1]([O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C:7](=[CH:8][C@@H:9](Br)[C@@H:10]3[C@@H:19]2[CH2:18][CH2:17][C@@:15]2([CH3:16])[C@H:11]3[CH2:12][CH2:13][C:14]2=[O:24])[CH2:6]1)(=[O:3])[CH3:2].[C:26](=O)(O)[O-:27].[Na+]>CO>[C:1]([O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C:7](=[CH:8][CH:9]([O:27][CH3:26])[C@@H:10]3[C@@H:19]2[CH2:18][CH2:17][C@@:15]2([CH3:16])[C@H:11]3[CH2:12][CH2:13][C:14]2=[O:24])[CH2:6]1)(=[O:3])[CH3:2]

Participants

4

Reactant 2

HCID 516892Sodium BicarbonateHCID 11811651HCID 11811651, compound

Product 1

HCID 45092570[(3S,8R,9S,10R,13S,14S)-7-methoxy-10,13-dimethyl-17-oxo-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-yl] acetate

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a clear solution of 3β-acetoxy-7α-bromoandrost-5-ene-17-one, 25, (0.5 g) in methanol (20 mL) was added silica gel (2.0 g, 70-230 mesh) and the mixture was stirred for 2 h at room temperature. The methanolic solution was cooled, neutralized with saturated sodium bicarbonate solution, and filtered on a thin bed of celite. The clear filtrate was cooled at 0° C. to obtain the white crystalline 7-methoxy derivative 26. Yield 0.32 g (72.7%), m.p. 175-78° C. The NMR spectrum of the white solid showed 55% 7β-methoxy- and 45% 7α-methoxy-compound. Spectral data described below were deduced from the spectrum of the mixture. The biological activity was assayed as the mixture (Table I).

Workup

  1. temperatureThe methanolic solution was cooled
  2. filtrationfiltered on a thin bed of celite
  3. temperatureThe clear filtrate was cooled at 0° C.

Sources & evidence

ORD record
ord-659e759f54d944f7bcdb3865f3b9d107
Source dataset
uspto-grants-2011_05
Patent number
US07947846B2

Reaction notes

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