2,2-Dimethylsuccinic anhydride → HCID 50923524, compound

HRID 2179804Notes

Reaction equation

HRID 2179804 reaction equation
[CH3:1][C:2]1([CH3:47])[C@@H:5]([C:6]([N:8]2[CH2:13][CH2:12][CH2:11][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[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13]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 50923385HCID 50923385, compound

Product 1

HCID 50923524HCID 50923524, compoundYield 39.6%

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-((1R,3S)-2,2-dimethyl-3-(piperidine-1-carbonyl)cyclobutyl)-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)icosahydro-1H-cyclopenta[a]chrysene-3a-carboxamide (Example 47, 0.190 g, 0.293 mmol) 2,2-Dimethylsuccinic anhydride (0.375 g, 2.932 mmol) and DMAP (0.071 g, 0.586 mmol) in pyridine (10 ml) were added at room temperature and refluxed for about 24 hours. After completion of the reaction (monitored by TLC), the reaction mixture was diluted with EtOAc, washed with aqueous 1N HCl, then water and brine, and dried over Na2SO4 then the solvent was evaporated and purified by silica gel column (100-200 mesh, elution 20% EtOAc in hexane) to afford the title compound as an off white solid. Wt: 0.090 g; Yield: 39.6%; 1H NMR (300 MHz, CDCl3): δ 5.96 (d, 111, J=8.1 Hz), 4.72 (s, 1H), 4.58 (s, 1H), 4.52-4.44 (m, 1H), 4.16-4.07 (m, 1H), 3.79-3.58 (m, 1H), 3.50-3.31 (m, 3H), 3.18-3.07 (m, 1H), 2.91-2.87 (m, 1H), 2.71-2.56 (m, 2H), 2.56-2.37 (m, 2H), 2.30-2.19 (m, 1H), 2.01-1.81 (m, 3H), 1.80-1.10 (m, 35H), 0.95, 0.93, 0.88, 0.87 (s, 21H); Mass: [M+1]+ 777 (30%), [M+Na]+ 799 (100%); IR (KBr, cm−1): 3400, 2947, 2868, 1733, 1622, 1456, 1390, 1369, 1320, 1252, 1231, 1192, 1150, 1021, 978, 881; HPLC: 97.37%; M.R: 168.5° C.-176.9° C.

Workup

  1. temperaturerefluxed for about 24 hours
  2. customAfter completion of the reaction (monitored by TLC)
  3. washwashed with aqueous 1N HCl
  4. dry with materialwater and brine, and dried over Na2SO4
  5. customthe solvent was evaporated
  6. custompurified by silica gel column (100-200 mesh, elution 20% EtOAc in hexane)

Sources & evidence

ORD record
ord-3da175c1ad864619a23611e373e1d9f4
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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