Sodium Hydroxide → HCID 50923798, compound

HRID 2179764Notes

Reaction equation

HRID 2179764 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([CH3:50])[C@@H:19]2[CH2:18][CH2:17][C@H:16]2[C@@:11]3([CH3:49])[CH2:12][CH2:13][C@@:14]3([C:30]([NH:32][C@@H:33]4[CH2:36][C@H:35]([C:37]([O:39]CC5C=CC=CC=5)=[O:38])[C:34]4([CH3:48])[CH3:47])=[O:31])[CH2:26][CH2:25][C@@H:24]([C:27]([CH3:29])=[CH2:28])[C@@H:15]32)[C:6]1([CH3:52])[CH3:51])(=O)C.[OH-].[Na+]>CO.C1COCC1>[OH:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C@@H:7]([CH2:8][CH2:9][C@:10]3([CH3:50])[C@@H:19]2[CH2:18][CH2:17][C@H:16]2[C@@:11]3([CH3:49])[CH2:12][CH2:13][C@@:14]3([C:30]([NH:32][C@@H:33]4[CH2:36][C@H:35]([C:37]([OH:39])=[O:38])[C:34]4([CH3:48])[CH3:47])=[O:31])[CH2:26][CH2:25][C@@H:24]([C:27]([CH3:29])=[CH2:28])[C@@H:15]32)[C:6]1([CH3:52])[CH3:51]

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 50923795HCID 50923795, compound

Product 1

HCID 50923798HCID 50923798, compoundYield 92%

Reagents, catalysts & solvents 1

HCID 21899815MeOH tetrahydrofuranSolvent

Procedure

To a solution of (1S,3R)-benzyl 3-((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-carboxamido)-2,2-dimethylcyclobutanecarboxylate (Example 2, about 0.140 g, 0.196 mmol) in MeOH:THF (2:1) (6 ml) at 0° C., 2N NaOH (2 ml) was added and allowed to stir at room temperature for about 6 hours. After completion of the reaction (monitored by TLC), the solvent was evaporated and acidified with 2N HCl, the aqueous layer was extracted with ethyl acetate and dried with Na2SO4. The solvent was evaporated and purified by silica gel column (100-200 mesh, elution 50% EtOAc in hexane) to afford the title compound as an off white solid. Wt: 0.105 g: Yield: 92%. 1H NMR (300 MHZ, CDCl3): δ 5.64 (d, 1H, J=7.8 Hz), 4.72 (s, 1H), 4.58 (s, 1H), 4.15 (q, 1H, J=9.3 Hz), 3.18 (dd, 1H, J=5.1, 10.8 Hz), 3.14-3.08 (m, 1H), 2.71-2.64 (m, 1H), 2.52-2.41 (m, 1H), 2.40-2.28 (m, 1H), 2.10-1.88 (m, 4H), 1.78-1.64 (m, 9H), 1.62-1.51 (m, 3H), 1.49-1.41 (m, 4H), 1.39-1.32 (m, 7H), 1.28-1.22 (m, 4H), 0.98 (s, 3H), 0.97 (s, 3H), 0.96 (s, 3H), 0.93 (s, 3H), 0.81 (s, 3H), 0.75 (s, 3H); Mass: [M+1]+ 582 (10%), [M+Na]+ 604 (100%); IR (KBr, cm−1): 3454, 3407, 2949, 2869, 1716, 1709, 1642, 1459, 1243, 1191, 1009, 885, 787; M.R: 174.6° C.-187.0° C.; HPLC: 90.33%.

Workup

  1. customAfter completion of the reaction (monitored by TLC)
  2. customthe solvent was evaporated
  3. extractionthe aqueous layer was extracted with ethyl acetate
  4. dry with materialdried with Na2SO4
  5. customThe solvent was evaporated
  6. custompurified by silica gel column (100-200 mesh, elution 50% EtOAc in hexane)

Sources & evidence

ORD record
ord-3afd1c2b885e4ed0ac497e4e1912f689
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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