Triethylamine → (S)-2-amino-1-(4-(3-bromopyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)-3-methoxypropan-1-one

HRID 1478285Notes

Reaction equation

HRID 1478285 reaction equation
[Br:1][C:2]1[CH:3]=[N:4][N:5]2[CH:10]=[CH:9][C:8]([N:11]3[CH2:16][CH2:15][NH:14][CH2:13][CH2:12]3)=[N:7][C:6]=12.[NH:17](C(OC(C)(C)C)=O)[C@H:18]([C:22](O)=[O:23])[CH2:19][O:20][CH3:21].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(CC)CC)C>CN(C=O)C.C(Cl)Cl>[NH2:17][C@@H:18]([CH2:19][O:20][CH3:21])[C:22]([N:14]1[CH2:15][CH2:16][N:11]([C:8]2[CH:9]=[CH:10][N:5]3[N:4]=[CH:3][C:2]([Br:1])=[C:6]3[N:7]=2)[CH2:12][CH2:13]1)=[O:23]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 7016354(2S)-2-(((tert-butoxy)carbonyl)amino)-3-methoxypropanoic acidHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 866974343-Bromo-5-(piperazin-1-yl)pyrazolo[1,5-a]pyrimidine

Product 1

HCID 89810859(S)-2-amino-1-(4-(3-bromopyrazolo[1,5-a]pyrimidin-5-yl)piperazin-1-yl)-3-methoxypropan-1-one

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

3-Bromo-5-(piperazin-1-yl)pyrazolo[1,5-a]pyrimidine (300 mg, 1.1 mmol) taken up in 10 mL DMF. Boc-Ser(Me)-OH (280 mg, 1.3 mmol), HATU (368 mg, 1.6 mmol), and triethylamine (590 uL, 4.25 mmol) was added and stirred at room temp overnight. Reaction was diluted with DCM and washed with water. DCM layer was dried over magnesium sulfate reduced in vacuo. This was then taken up in 30% TFA in DCM solution and stirred at room temperature for 2 hours. It was then cooled to 0° C. and conc Aq NaOH added slowly until aqueous layer remains basic. DCM layer extracted dried over magnesium sulfate, reduced in vacuo for 405 mg crude product for further reaction as is. LRMS (ESI) m/z 383/385 [(M+H)]+, calc'd for C14H19BrN6O2: 383.25.

Workup

  1. customReaction
  2. washwashed with water
  3. dry with materialDCM layer was dried over magnesium sulfate
  4. stirringstirred at room temperature for 2 hours
  5. temperatureIt was then cooled to 0° C.
  6. additionconc Aq NaOH added slowly until aqueous layer
  7. extractionDCM layer extracted
  8. dry with materialdried over magnesium sulfate
  9. customreduced in vacuo for 405 mg crude product for further reaction

Sources & evidence

ORD record
ord-c54ed2a45e6b482c89ec2d3b3a2e2e9d
Source dataset
uspto-grants-2016_08
Patent number
US09403832B2

Reaction notes

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