Diisopropylethylamine → tert-butyl 3-({3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]benzoyl}amino)-1H-pyrazole-1-carboxylate

HRID 20502Notes

Reaction equation

HRID 20502 reaction equation
CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.[CH3:25][O:26][CH2:27][C@@H:28]([O:30][C:31]1[CH:32]=[C:33]([CH:37]=[C:38]([O:40][C:41]2[CH:46]=[CH:45][C:44]([S:47]([CH3:50])(=[O:49])=[O:48])=[CH:43][CH:42]=2)[CH:39]=1)[C:34](O)=[O:35])[CH3:29].CCN(C(C)C)C(C)C.[NH2:60][C:61]1[CH:65]=[CH:64][N:63]([C:66]([O:68][C:69]([CH3:72])([CH3:71])[CH3:70])=[O:67])[N:62]=1>CN(C=O)C>[CH3:25][O:26][CH2:27][C@H:28]([CH3:29])[O:30][C:31]1[CH:32]=[C:33]([CH:37]=[C:38]([O:40][C:41]2[CH:46]=[CH:45][C:44]([S:47]([CH3:50])(=[O:49])=[O:48])=[CH:43][CH:42]=2)[CH:39]=1)[C:34]([NH:60][C:61]1[CH:65]=[CH:64][N:63]([C:66]([O:68][C:69]([CH3:72])([CH3:71])[CH3:70])=[O:67])[N:62]=1)=[O:35]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 51358380tert-Butyl 3-amino-1H-pyrazole-1-carboxylateHCID 59263311(S)-3-(1-methoxypropan-2-yloxy)-5-(4-(methylsulfonyl)phenoxy)benzoic acid

Product 1

HCID 59346881tert-butyl 3-({3-[(1S)-2-methoxy-1-methylethoxy]-5-[4-(methylsulfonyl)phenoxy]benzoyl}amino)-1H-pyrazole-1-carboxylateYield 43%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

HATU (375 mg, 1.17 mmol) was added to 3-{(1S)-2-methoxy-(1-methylethyl)oxy}-5-{[4-(methylsulfonyl)phenyl]oxy}benzoic acid (300 mg, 0.79 mmol) followed by addition of DMF (5 mL), DIPEA (0.35 mL) and tert-butyl 3-amino-1H-pyrazole-1-carboxylate (155 mg, 0.85 mmol) and the reaction was stirred under argon for 4 h. The solvent was evaporated and the residue was dissolved in saturated aqueous sodium hydrogencarbonate (30 mL) and ethyl acetate (50 mL). The organic layer was separated, washed with saturated aqueous ammonium chloride (30 mL) then dried (MgSO4), filtered and evaporated. Purification by column chromatography, eluting with 50% ethyl acetate in hexanes, afforded the title compound as a colourless oil (185 mg, 43%).

Workup

  1. customThe solvent was evaporated
  2. dissolutionthe residue was dissolved in saturated aqueous sodium hydrogencarbonate (30 mL)
  3. customThe organic layer was separated
  4. washwashed with saturated aqueous ammonium chloride (30 mL)
  5. dry with materialthen dried (MgSO4)
  6. filtrationfiltered
  7. customevaporated
  8. customPurification by column chromatography
  9. washeluting with 50% ethyl acetate in hexanes

Sources & evidence

ORD record
ord-9d95d28151b146eb89a4ef05e0f4d10b
Source dataset
uspto-grants-2010_06
Patent number
US07745475B2

Reaction notes

Loading…