Hydrochloric Acid → HCID 58392958, compound

HRID 2194973Notes

Reaction equation

HRID 2194973 reaction equation
C(OC([NH:8][C@H:9]([CH3:40])[C:10]([O:12][C@@H:13]1[CH2:29][C@@H:28]2[C@@:16]([CH3:39])([C@@H:17]3[C@@H:25]([CH2:26][CH2:27]2)[C@:24]2([OH:30])[C@@:20]([CH3:38])([C@@H:21]([C:31]4[CH:32]=[CH:33][C:34](=[O:37])[O:35][CH:36]=4)[CH2:22][CH2:23]2)[CH2:19][CH2:18]3)[CH2:15][CH2:14]1)=[O:11])=O)(C)(C)C.Cl>CCOC(C)=O>[NH2:8][C@H:9]([CH3:40])[C:10]([O:12][C@@H:13]1[CH2:29][C@@H:28]2[C@@:16]([CH3:39])([C@@H:17]3[C@@H:25]([CH2:26][CH2:27]2)[C@:24]2([OH:30])[C@@:20]([CH3:38])([C@@H:21]([C:31]4[CH:32]=[CH:33][C:34](=[O:37])[O:35][CH:36]=4)[CH2:22][CH2:23]2)[CH2:19][CH2:18]3)[CH2:15][CH2:14]1)=[O:11]

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 66635630HCID 66635630, compound

Product 1

HCID 58392958HCID 58392958, compoundYield 43%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (R)-(3S,5R,8R,9S,10S,13R,14S,17R)-14-hydroxy-10,13-dimethyl-17-(2-oxo-2H-pyran-5-yl)hexadecahydro-1H-cyclopenta[a]phenanthren-3-yl 2-((tert-butoxycarbonyl)amino)propanoate in EtOAc (3 mL) was added HCl (4 M in EtOAc, 3 mL) in drops at 0° C. The resulting mixture was warmed to rt after 30 min and stirred for 2 h. The mixture was quenched with saturated NaHCO3 solution and extracted with EtOAc (20 mL×3). The organic layer was washed with H2O (10 mL×4) and then dried over anhydrous Na2SO4, concentrated under reduced pressure. The crude product was then purified via Prep-TLC (CH2Cl2: MeOH=10:1) to afford the (R)-(3S,5R,8R,9S,10S,13R,14S,17R)-14-hydroxy-10,13-dimethyl-17-(2-oxo-2H-pyran-5-yl)hexadecahydro-1H-cyclopenta[a]phenanthren-3-yl 2-aminopropanoate (8 mg, 43% yield) as a white solid. LRMS (M+H+) m/z 458.5. 1H NMR (CD3OD, 400 MHz) δ 7.89 (dd, J=9.6, 2.4 Hz, 1H), 7.33 (m, 1H), 6.17 (d, J=9.6 Hz, 1H), 5.02 (m, 1H), 3.54 (m, 1H), 2.43-2.48 (m, 1H), 1.08-2.15 (m, 24H), 0.88 (s, 3H), 0.62 (s, 3H).

Workup

  1. customThe mixture was quenched with saturated NaHCO3 solution
  2. extractionextracted with EtOAc (20 mL×3)
  3. washThe organic layer was washed with H2O (10 mL×4)
  4. dry with materialdried over anhydrous Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customThe crude product was then purified via Prep-TLC (CH2Cl2: MeOH=10:1)

Sources & evidence

ORD record
ord-ba4da07baf8b4222b7b5c5810a422c53
Source dataset
uspto-grants-2012_12
Patent number
US08334376B2

Reaction notes

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