Tetrahydrofuran → HCID 50924390, compound

HRID 2179814Notes

Reaction equation

HRID 2179814 reaction equation
C([O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C@@H:7]([CH2:8][CH2:9][C@:10]3([CH3:46])[C@@H:19]2[CH2:18][CH2:17][C@H:16]2[C@@:11]3([CH3:45])[CH2:12][CH2:13][C@@:14]3([C:30]([N:32]4[CH2:37][CH2:36][C:35]([CH2:43][CH3:44])([C:38]([O:40][CH2:41][CH3:42])=[O:39])[CH2:34][CH2:33]4)=[O:31])[CH2:26][CH2:25][C@@H:24]([C:27]([CH3:29])=[CH2:28])[C@@H:15]32)[C:6]1([CH3:48])[CH3:47])(=O)C.C1COCC1.[OH-].[Na+]>CO>[CH2:43]([C:35]1([C:38]([O:40][CH2:41][CH3:42])=[O:39])[CH2:34][CH2:33][N:32]([C:30]([C@:14]23[CH2:26][CH2:25][C@@H:24]([C:27]([CH3:29])=[CH2:28])[C@@H:15]2[C@@H:16]2[C@@:11]([CH3:45])([CH2:12][CH2:13]3)[C@@:10]3([CH3:46])[C@@H:19]([C@:20]4([CH3:23])[C@@H:7]([CH2:8][CH2:9]3)[C:6]([CH3:48])([CH3:47])[C@@H:5]([OH:4])[CH2:22][CH2:21]4)[CH2:18][CH2:17]2)=[O:31])[CH2:37][CH2:36]1)[CH3:44]

Participants

5

Reactant 3

HCID 8028TetrahydrofuranHCID 14798Sodium HydroxideHCID 50924389HCID 50924389, compound

Product 1

HCID 50924390HCID 50924390, compoundYield 77.4%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Ethyl 1-((1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-acetoxy-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)icosahydro-1H-cyclopenta[a]chrysene-3a-carbonyl)-4-ethylpiperidine-4-carboxylate (Example 72, 2.0 g) was taken in MeOH:THF (8:8 ml) and cooled the contents to 0° C. then sodium hydroxide (1.5 g in 4 ml water) was added and the contents were stirred for about 6 hours at room temperature. After completion of the reaction (monitored by TLC), the reaction mixture was evaporated under reduced pressure. The residue was taken in water and extracted with DCM; the organic layer was dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by silica gel column chromatography using 5% methanol in DCM as eluent to furnish the title compound (1.45 g) as a white solid. 1H NMR (300 MHz, CDCl3): 0.57-0.97 (m, 19H); 1.18-1.21 (m, 8H); 1.25-1.41 (m, 12H); 1.49-1.62 (m, 10H); 1.65-1.82 (m, 10H); 1.85-1.98 (m, 4H); 2.56-2.69 (m, 2H); 3.29-3.38 (m, 1H); 3.89-3.90 (m, 1H); 4.15-4.18 (m, 2H); 4.56 (s, 1H); 4.71 (s, 1H); MASS: 624 (100%).

Workup

  1. customAfter completion of the reaction (monitored by TLC)
  2. customthe reaction mixture was evaporated under reduced pressure
  3. extractionextracted with DCM
  4. dry with materialthe organic layer was dried over Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-4d9be28f0c3947d7be3ce961f08f2b43
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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