Dimethylamine → Gsk-1070916

HRID 1180872Notes

Reaction equation

HRID 1180872 reaction equation
[CH2:1]([N:3]1[CH:7]=[C:6]([C:8]2[CH:13]=[CH:12][N:11]=[C:10]3[NH:14][C:15]([C:17]4[CH:22]=[CH:21][CH:20]=[C:19]([CH:23]=O)[CH:18]=4)=[CH:16][C:9]=23)[CH:5]([C:25]2[CH:30]=[CH:29][C:28]([NH:31][C:32](=[O:36])[N:33]([CH3:35])[CH3:34])=[CH:27][CH:26]=2)[NH:4]1)[CH3:2].[CH3:37][NH:38][CH3:39].C1COCC1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>>[CH3:37][N:38]([CH2:23][C:19]1[CH:18]=[C:17]([C:15]2[NH:14][C:10]3=[N:11][CH:12]=[CH:13][C:8]([C:6]4[C:5]([C:25]5[CH:30]=[CH:29][C:28]([NH:31][C:32](=[O:36])[N:33]([CH3:35])[CH3:34])=[CH:27][CH:26]=5)=[N:4][N:3]([CH2:1][CH3:2])[CH:7]=4)=[C:9]3[CH:16]=2)[CH:22]=[CH:21][CH:20]=1)[CH3:39]

Participants

5

Reactant 4

HCID 674DimethylamineHCID 8028TetrahydrofuranHCID 5049666Sodium triacetoxyborohydrideHCID 86760558HCID 86760558, compound

Product 1

HCID 46885626Gsk-1070916

Procedure

To N′-(4-{1-ethyl-4-[2-(3-formylphenyl)-1H-pyrrolo[2,3-b]pyridin-4-yl]-2H-pyrazol-3-yl}phenyl)-N,N-dimethylurea (11.45 g, 23.9 mMol) was added a solution of 2 M dimethylamine in THF (24 mL, 48 mMol). The slurry was rinsed down with THF (150 mL) and treated with NaBH(OAc)3 (8.6 g, 40.6 mMol). (Gentle gas evolution was seen and the reaction got slightly warm to the touch.) The reaction was stirred at RT for 1 h (started out as a thick suspension that slowly became a homogeneous fine suspension) and concentrated to dryness under vacuum. The residue that remained was basified with aq. 1 N Na2CO3, (200 mL) and aq. 1 N NaOH (25 mL), extracted with CHCl3 (300 mL) washed with brine, dried (Na2SO4), filtered, and evaporated to dryness under vacuum. Trituration with (1:1) Et2O/pet. ether, filtration, and drying under vacuum gave the title compound (11.20 g, 92%) as a yellow solid (>95% pure by HPLC): MS (ES) m/e 508.2 (M+H)+; 1H NMR (400 MHz, DMSO-d6)12.14 (d, J=1.8 Hz, 1H), 8.31 (s, 1H), 8.27 (s, 1H), 8.07 (d, J=4.8 Hz, 1H), 7.78 (d, J=8.1 Hz, 1H), 7.77 (s, 1H), 7.43 (d, J=8.6 Hz, 2H), 7.39 (d, J=8.1 Hz, 1H), 7.27 (d, J=8.6 Hz, 2H), 7.27 (dd, 1H), 6.79 (d, J=5.1 Hz, 1H), 6.76 (d, J=2.0 Hz, 1H), 4.27 (q, J=7.3 Hz, 2H), 3.43 (s, 2H), 2.18 (s, 6H), 1.51 (t, J=7.2 Hz, 3H).

Workup

  1. washThe slurry was rinsed down with THF (150 mL)
  2. temperaturethe reaction got slightly warm to the touch
  3. concentrationconcentrated to dryness under vacuum
  4. extractionextracted with CHCl3 (300 mL)
  5. washwashed with brine
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. customevaporated to dryness under vacuum
  9. filtrationTrituration with (1:1) Et2O/pet. ether, filtration
  10. customdrying under vacuum

Sources & evidence

ORD record
ord-490903385e944e1ea03f4874a8f46bf7
Source dataset
uspto-grants-2007_10
Patent number
US07282588B2

Reaction notes

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