3,3-Dimethylglutaric anhydride → HCID 66858755, compound

HRID 2179821Notes

Reaction equation

HRID 2179821 reaction equation
[CH2:1]([CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][C@H:15]2[CH2:19][CH2:18][C@@H:17]([NH:20][C:21]([C@:23]34[CH2:49][CH2:48][C@@H:47]([C:50]([CH3:52])=[CH2:51])[C@@H:24]3[C@@H:25]3[C@@:38]([CH3:41])([CH2:39][CH2:40]4)[C@@:37]4([CH3:42])[C@@H:28]([C@:29]5([CH3:46])[C@@H:34]([CH2:35][CH2:36]4)[C:33]([CH3:44])([CH3:43])[C@@H:32]([OH:45])[CH2:31][CH2:30]5)[CH2:27][CH2:26]3)=[O:22])[CH2:16]2)[CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CC1C=CN=C(N)C=1C.[CH3:62][C:63]1([CH3:71])[CH2:68][C:67](=[O:69])[O:66][C:65](=[O:70])[CH2:64]1>N1C=CC=CC=1.C(OCC)(=O)C>[CH2:1]([CH:8]1[CH2:13][CH2:12][N:11]([CH2:14][C@H:15]2[CH2:19][CH2:18][C@@H:17]([NH:20][C:21]([C@:23]34[CH2:49][CH2:48][C@@H:47]([C:50]([CH3:52])=[CH2:51])[C@@H:24]3[C@@H:25]3[C@@:38]([CH3:41])([CH2:39][CH2:40]4)[C@@:37]4([CH3:42])[C@@H:28]([C@:29]5([CH3:46])[C@@H:34]([CH2:35][CH2:36]4)[C:33]([CH3:44])([CH3:43])[C@@H:32]([O:45][C:67](=[O:69])[CH2:68][C:63]([CH3:71])([CH3:62])[CH2:64][C:65]([OH:70])=[O:66])[CH2:31][CH2:30]5)[CH2:27][CH2:26]3)=[O:22])[CH2:16]2)[CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 778133,3-Dimethylglutaric anhydrideHCID 110078842-Amino-3,4-dimethylpyridineHCID 50925136HCID 50925136, compound

Product 1

HCID 66858755HCID 66858755, compound

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-N-((1R,3S)-3-((4-benzylpiperidin-1-yl)methyl)cyclopentyl)-9-hydroxy-5a,5b,8,8,11a-pentamethyl-1-(prop-1-en-2-yl)icosahydro-1H-cyclopenta[a]chrysene-3a-carboxamide (Example 32, 0.5 g, 0.80 mmol) in pyridine (5 ml), dimethyl amino pyridine (0.2 g, 1.6 mmol) was added, followed by 4,4-dimethyldihydro-2H-pyran-2,6(3H)-dione (0.82 ml) was added. The contents were refluxed for 16 hours. After completion of the reaction (monitored by TLC), the reaction mixture was diluted with ethyl acetate (30 ml). The organic layer was washed with 5% aqueous HCl, water followed by brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by silica gel column chromatography using 5% MeOH in DCM as eluent to furnish the title compound (0.25 g) as a white solid. 1H NMR (300 MHz, CDCl3): 0.80-0.95 (m, 17H); 1.14-1.67 (m, 23H); 1.82-2.02 (m, 15H); 2.23-3.50 (m, 15H); 4.21-4.45 (m, 2H); 4.57 (s, 1H); 4.72 (s, 1H); 6.28-6.30 (m, 1H); 7.11-7.13 (m, 2H); 7.14-7.22 (m, 1H); 7.24-7.29 (m, 2H); ES Mass: 841 (100%), [M+1].

Workup

  1. additionwas added
  2. temperatureThe contents were refluxed for 16 hours
  3. customAfter completion of the reaction (monitored by TLC)
  4. washThe organic layer was washed with 5% aqueous HCl, water
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-9daa353809d64f3097a1ce93b8967e40
Source dataset
uspto-grants-2015_06
Patent number
US09067966B2

Reaction notes

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