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Trifluoroacetic acid → 4-(6-(2H-1,2,3-triazol-2-yl)pyridin-2-ylamino)-6-((1R,2S)-2-aminocyclohexylamino)pyridazine-3-carboxamide

HRID 1396412
Notes
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Reaction equation

HRID 1396412 reaction equation
[N:1]1[N:2]([C:6]2[N:11]=[C:10]([NH:12][C:13]3[CH:14]=[C:15]([NH:22][C@@H:23]4[CH2:28][CH2:27][CH2:26][CH2:25][C@@H:24]4[NH:29]C(=O)OC(C)(C)C)[N:16]=[N:17][C:18]=3[C:19](=[O:21])[NH2:20])[CH:9]=[CH:8][CH:7]=2)[N:3]=[CH:4][CH:5]=1.FC(F)(F)C(O)=O>ClCCl.[OH-].[Na+]>[N:1]1[N:2]([C:6]2[N:11]=[C:10]([NH:12][C:13]3[CH:14]=[C:15]([NH:22][C@@H:23]4[CH2:28][CH2:27][CH2:26][CH2:25][C@@H:24]4[NH2:29])[N:16]=[N:17][C:18]=3[C:19]([NH2:20])=[O:21])[CH:9]=[CH:8][CH:7]=2)[N:3]=[CH:4][CH:5]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 6422Trifluoroacetic acidHCID 86689762tert-butyl (1S,2R)-2-(5-(6-(2H-1,2,3-triazol-2-yl)pyridin-2-ylamino)-6-carbamoylpyridazin-3-ylamino)cyclohexylcarbamate

Product 1

HCID 716269734-(6-(2H-1,2,3-triazol-2-yl)pyridin-2-ylamino)-6-((1R,2S)-2-aminocyclohexylamino)pyridazine-3-carboxamideYield 7%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×
HCID 14798Sodium HydroxideSolvent

Procedure

To a solution of tert-butyl (1S,2R)-2-(5-(6-(2H-1,2,3-triazol-2-yl)pyridin-2-ylamino)-6-carbamoylpyridazin-3-ylamino)cyclohexylcarbamate (79 mg, 160 μmol) in dichloromethane (2.5 mL) was added trifluoroacetic acid (364 mg, 246 μL, 3.19 mmol) and the mixture stirred at room temperature for 16 h. The mixture was diluted with dichloromethane and 1 N NaOH (2 mL), and then washed with NaHCO3 and brine. The organic layer was dried over MgSO4, then filtered and concentrated in vacuo. The mixture was dissolved in ethanol and concentrated (3×). The residue obtained was triturated with ether and finally filtered to give 4-(6-(2H-1,2,3-triazol-2-yl)pyridin-2-ylamino)-6-((1R,2S)-2-aminocyclohexylamino)pyridazine-3-carboxamide (5 mg, 10.8 μmol, 7%) as a light brown solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 12.12 (s, 1H), 8.46 (s, 1H), 8.38 (s, 2H), 7.99 (t, J=8.1 Hz, 1H), 7.80 (s, 1H), 7.62 (d, J=8.1 Hz, 1H), 7.11 (d, J=8.2 Hz, 1H), 6.94 (s., 1H), 1.35-1.85 (m, 8H), 1.46 (m, 2H); MS (EI/CI) m/z: 395.1 [M+H].

Workup

  1. washwashed with NaHCO3 and brine
  2. dry with materialThe organic layer was dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. dissolutionThe mixture was dissolved in ethanol
  6. concentrationconcentrated (3×)
  7. customThe residue obtained
  8. customwas triturated with ether
  9. filtrationfinally filtered

Sources & evidence

ORD record
ord-8a87bdf42dd34ccaa9a94293ecb1884c
Source dataset
uspto-grants-2014_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08901124B2

Reaction notes

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