2,2-Dimethylsuccinic anhydride → HCID 50924072, compound

HRID 2179767Notes

Reaction equation

HRID 2179767 reaction equation
[CH3:1][C:2]1([CH3:47])[C@H:5]([C:6]([N:8]2[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)=[O:7])[CH2:4][C@@H:3]1[NH:14][C:15]([C@:17]12[CH2:43][CH2:42][C@@H:41]([C:44]([CH3:46])=[CH2:45])[C@@H:18]1[C@@H:19]1[C@@:32]([CH3:35])([CH2:33][CH2:34]2)[C@@:31]2([CH3:36])[C@@H:22]([C@:23]3([CH3:40])[C@@H:28]([CH2:29][CH2:30]2)[C:27]([CH3:38])([CH3:37])[C@@H:26]([OH:39])[CH2:25][CH2:24]3)[CH2:21][CH2:20]1)=[O:16].[CH3:48][C:49]1([CH3:56])[CH2:54][C:53](=[O:55])[O:52][C:50]1=[O:51]>CN(C1C=CN=CC=1)C.N1C=CC=CC=1.CCOC(C)=O>[CH3:1][C:2]1([CH3:47])[C@H:5]([C:6]([N:8]2[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)=[O:7])[CH2:4][C@@H:3]1[NH:14][C:15]([C@:17]12[CH2:43][CH2:42][C@@H:41]([C:44]([CH3:46])=[CH2:45])[C@@H:18]1[C@@H:19]1[C@@:32]([CH3:35])([CH2:33][CH2:34]2)[C@@:31]2([CH3:36])[C@@H:22]([C@:23]3([CH3:40])[C@@H:28]([CH2:29][CH2:30]2)[C:27]([CH3:37])([CH3:38])[C@@H:26]([O:39][C:53](=[O:55])[CH2:54][C:49]([CH3:56])([CH3:48])[C:50]([OH:52])=[O:51])[CH2:25][CH2:24]3)[CH2:21][CH2:20]1)=[O:16]

Participants

6

Reactant 2

HCID 870672,2-Dimethylsuccinic anhydrideHCID 50923931HCID 50923931, compound

Product 1

HCID 50924072HCID 50924072, compoundYield 46.8%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 1049PyridineSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-N-((1S,3R)-2,2-dimethyl-3-(morpholine-4-carbonyl)cyclobutyl)-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)icosahydro-1H-cyclopenta[a]chrysene-3a-carboxamide (Example 8, 0.250 g, 0.385 mmol) 2,2-Dimethylsuccinic anhydride (0.26 ml, 2.31 mmol) and DMAP (0.094 g, 0.77 mmol) in pyridine (10 ml) were added at room temperature then the reaction mixture was refluxed for about 16 hours. After completion of the reaction (monitored by TLC) the reaction mixture was diluted with EtOAc, the organic layer was washed with water, 1N HCl, water, brine and dried with Na2SO4, the solvent was evaporated and purified by silica gel column (100-200, elution 35% EtOAc in hexane) to afford the title compound as a off white solid. Wt: 0.140 g: Yield: 46.8%; 1H NMR. (300 MHz, CDCl3): δ 5.95 (d, 1H), 4.73 (s, 1H), 4.58 (s, 1H), 4.52-4.43 (m, 1H), 4.19-4.09 (m, 1H), 3.82-3.40 (m, 8H), 3.17-3.04 (m, 1H), 2.92-1.82 (m, 1H), 2.71-2.29 (m, 6H), 2.00-1.91 (m, 3H), 1.80-1.09 (m, 28H), 1.00-0.77 (m, 21H); Mass: [M+1]+ 779 (100%), [M+Na]+ 801 (15%); IR (KBr, cm−1): 3419, 2952, 2867, 1757, 1733, 1729, 1638, 1631, 1460, 1452, 1376, 1243, 1180, 1117, 1067, 978, 879, 775; M.R: 248.7° C.-252.6° C.; HPLC: 87.7%

Workup

  1. temperaturethe reaction mixture was refluxed for about 16 hours
  2. customAfter completion of the reaction (monitored by TLC) the reaction mixture
  3. washthe organic layer was washed with water, 1N HCl, water, brine
  4. dry with materialdried with Na2SO4
  5. customthe solvent was evaporated
  6. custompurified by silica gel column (100-200, elution 35% EtOAc in hexane)

Sources & evidence

ORD record
ord-24dfc44e8310495780bd6e4f85c9968c
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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