Reaction #86296

ord-0f797ca77f204f539ca8b372cb494e57

Reaction equation

CC(=O)OCC(=O)[C@H]1[C@H](C)CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C
2-oxo-2-((10S,13S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
O=C([O-])[O-].[K+].[K+]
potassium carbonate
Cl
HCl
→
C[C@@H]1CC2C3CCC4=CC(=O)C=C[C@]4(C)C3=CC[C@]2(C)[C@H]1C(=O)CO
product
Yield 37.3%
C[C@@H]1CC2C3CCC4=CC(=O)C=C[C@]4(C)C3=CC[C@]2(C)[C@H]1C(=O)CO
(10S,13S,16R,17S)-17-(2-hydroxyacetyl)-10,13,16-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one
Yield 37.3%

Reactants

CC(=O)OCC(=O)[C@H]1[C@H](C)CC2C3CCC4=CC(=O)CC[C@]4(C)C3=CC[C@@]21C
2-oxo-2-((10S,13S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate
O=C([O-])[O-].[K+].[K+]
potassium carbonate
Cl
HCl

Reagents

None

Solvents

ClCCl
methylene chloride
CO
methanol

Conditions

Temperature
5°CELSIUS
Detailed conditions
See reaction.notes.procedure_details.

Workup

  1. 1
    Temperaturecooled in an ice bath
  2. 2
    Concentrationconcentrated
  3. 3
    OtherAfter partitioning between water and methylene chloride
  4. 4
    Dryingthe product solution was dried over anhydrous magnesium sulfate
  5. 5
    Filtrationfiltered
  6. 6
    Otherevaporated
  7. 7
    OtherCrystallization from ethyl acetate

Procedure

A solution of 2-oxo-2-((10S,13S,16R,17S)-10,13,16-trimethyl-3-oxo-2,3,6,7,8,10,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethyl acetate (1.0 g, 2.6 mM) in methylene chloride (5 mL) and methanol (15 mL) was put under an inert atmosphere and cooled in an ice bath. 1 mL of 1 M aqueous potassium carbonate was added by syringe. The reaction was stirred at 5° C. for 2 h. The reaction was then neutralized with 1N HCl and concentrated. After partitioning between water and methylene chloride, the product solution was dried over anhydrous magnesium sulfate, filtered and evaporated. Crystallization from ethyl acetate yielded a first crop of 0.33 g product. NMR (500 MHz, CDCl3, TMS): δ 0.67 (s, 3H), 1.01 (d, 3H, J=7 Hz), 1.13 (m, 1H), 1.33 (s, 3H), 1.47-1.80 (m, 3, H), 2.00 (m, 1H), 2.06-2.24 (m, 6H), 2.37 (d, 1H), 2.45-2.60 (m, 3H), 2.82 (m, 1H), 3.30 (m, 1H), 4.20 (m, 2H), 5.50 (d, 1H, J=5 Hz), 5.76 (s, 1H).

Source

DOI: 10.6084/m9.figshare.5104873.v1Patent: US09434758B2uspto-grants-2016_09