Sodium Hydroxide → (S)-2-(tert-butoxy)-2-(2-((3,3-dimethylbutyl)carbamoyl)-7-(4,4-dimethylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)acetic acid

HRID 1630331Notes

Reaction equation

HRID 1630331 reaction equation
[C:1]([O:5][C@@H:6]([C:12]1[C:13]([CH3:32])=[N:14][C:15]2[N:16]([N:26]=[C:27]([C:29]([OH:31])=O)[CH:28]=2)[C:17]=1[N:18]1[CH2:23][CH2:22][C:21]([CH3:25])([CH3:24])[CH2:20][CH2:19]1)[C:7]([O:9]CC)=[O:8])([CH3:4])([CH3:3])[CH3:2].[CH3:33][C:34]([CH3:39])([CH3:38])[CH2:35][CH2:36][NH2:37].CCN(C(C)C)C(C)C.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[OH-].[Na+]>CN(C=O)C.CN(C1C=CN=CC=1)C.CO.O>[C:1]([O:5][C@@H:6]([C:12]1[C:13]([CH3:32])=[N:14][C:15]2[N:16]([N:26]=[C:27]([C:29](=[O:31])[NH:37][CH2:36][CH2:35][C:34]([CH3:39])([CH3:38])[CH3:33])[CH:28]=2)[C:17]=1[N:18]1[CH2:23][CH2:22][C:21]([CH3:25])([CH3:24])[CH2:20][CH2:19]1)[C:7]([OH:9])=[O:8])([CH3:4])([CH3:2])[CH3:3]

Participants

10

Reactant 5

HCID 14798Sodium HydroxideHCID 197093,3-DimethylbutylamineHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 71259137(S)-6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4,4-dimethylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxylic acid

Product 1

HCID 71259138(S)-2-(tert-butoxy)-2-(2-((3,3-dimethylbutyl)carbamoyl)-7-(4,4-dimethylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)acetic acidYield 70.5%

Reagents, catalysts & solvents 4

HCID 142844-(Dimethylamino)pyridineCatalystHCID 887MethanolSolventHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a mixture of (S)-6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4,4-dimethylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxylic acid (50 mg, 0.112 mmol) and 3,3-dimethylbutan-1-amine (22.66 mg, 0.224 mmol) in DMF (2 mL) was added DIEA (0.098 mL, 0.560 mmol), HATU (85 mg, 0.224 mmol) and DMAP (2.74 mg, 0.022 mmol) and the resulting mixture was stirred at room temp for 16 h. At this point LCMS indicated completion of reaction. Water was then added and the mixture was extracted with ethyl acetate (25 mL), washed with brine (15 mL), dried (Na2SO4), filtered and concentrated. Crude was then treated with 1N NaOH (0.336 mL, 0.336 mmol) in MeOH (2.000 mL) at 60° C. for 5 h. Mixture was then cooled and purified by prep-HPLC to afford (S)-2-(tert-butoxy)-2-(2-((3,3-dimethylbutyl)carbamoyl)-7-(4,4-dimethylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)acetic acid (41.6 mg, 0.079 mmol, 70.4% yield). 1H NMR (500 MHz, DMSO-d6) δ 8.13 (t, J=5.6 Hz, 1H), 6.77 (s, 1H), 5.46 (s, 1H), 3.37-3.28 (m, 6H), 1.92 (s, 3H), 1.67-1.55 (m, 2H), 1.54-1.40 (m, 4H), 1.14 (s, 9H), 1.08 (br. s., 6H), 0.96 (s, 9H). LCMS (M+H)=502.5.

Workup

  1. customcompletion of reaction
  2. extractionthe mixture was extracted with ethyl acetate (25 mL)
  3. washwashed with brine (15 mL)
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. temperatureMixture was then cooled
  8. custompurified by prep-HPLC

Sources & evidence

ORD record
ord-13b5cab2425842e4b24a5bcaaa610b39
Source dataset
uspto-grants-2014_07
Patent number
US08791108B2

Reaction notes

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