1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (S)-N-(1-(3-(3-Chloro-4-cyano-5-fluorophenyl)-1H-pyrazol-1-yl)propan-2-yl)-3-isopropyl-1,2,4-oxadiazole-5-carboxamide

HRID 1409318Notes

Reaction equation

HRID 1409318 reaction equation
[CH:1]([C:4]1[N:8]=[C:7]([C:9]([OH:11])=O)[O:6][N:5]=1)([CH3:3])[CH3:2].CCN=C=NCCCN(C)C.CCN(C(C)C)C(C)C.C1C=CC2N(O)N=NC=2C=1.[NH2:42][C@@H:43]([CH3:60])[CH2:44][N:45]1[CH:49]=[CH:48][C:47]([C:50]2[CH:57]=[C:56]([F:58])[C:53]([C:54]#[N:55])=[C:52]([Cl:59])[CH:51]=2)=[N:46]1>CN(C=O)C.O.CCOC(C)=O>[Cl:59][C:52]1[CH:51]=[C:50]([C:47]2[CH:48]=[CH:49][N:45]([CH2:44][C@@H:43]([NH:42][C:9]([C:7]3[O:6][N:5]=[C:4]([CH:1]([CH3:2])[CH3:3])[N:8]=3)=[O:11])[CH3:60])[N:46]=2)[CH:57]=[C:56]([F:58])[C:53]=1[C:54]#[N:55]

Participants

9

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 232010263-Isopropyl-1,2,4-oxadiazole-5-carboxylic acidHCID 67170587(S)-4-(1-(2-aminopropyl)-1H-pyrazol-3-yl)-2-chloro-6-fluorobenzonitrile

Product 1

HCID 66576599(S)-N-(1-(3-(3-Chloro-4-cyano-5-fluorophenyl)-1H-pyrazol-1-yl)propan-2-yl)-3-isopropyl-1,2,4-oxadiazole-5-carboxamideYield 1.3%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

3-Isopropyl-1,2,4-oxadiazole-5-carboxylic acid (1.281 mmol, 0.2 g) was dissolved in DMF (5 ml) under nitrogen atmosphere. EDCI (1.601 mmol, 0.307 g), DIPEA (3.20 mmol, 0.414 g) and HOBt (1.601 mmol, 0.216 g) were added and the resulting mixture was stirred for 20 min at RT. (S)-4-(1-(2-Aminopropyl)-1H-pyrazol-3-yl)-2-chloro-6-fluorobenzonitrile (1.067 mmol, 0.298 g) dissolved in DMF (5 ml) was added and the resulting mixture was stirred at RT for 2 days. The mixture was diluted with water and EtOAc, washed with 2 M Na2CO3, water and brine. The combined organics were dried, filtered and evaporated. The crude product was purified by preparative HPLC. 0.0056 g of the title compound was obtained. 1H-NMR (400 MHz, CDCl3): δ 1.25 (d, 3H), 1.38 (d, 6H), 3.11-3.26 (m, 1H), 4.26-4.35 (m, 1H), 4.41-4.50 (m, 1H), 4.55-4.67 (m, 1H), 6.65-6.69 (m, 1H), 7.54-7.57 (m, 1H), 7.64-7.69 (m, 1H), 7.74-7.77 (m, 1H), 8.39 (d, 1H).

Workup

  1. additionwas added
  2. stirringthe resulting mixture was stirred at RT for 2 days
  3. washwashed with 2 M Na2CO3, water and brine
  4. customThe combined organics were dried
  5. filtrationfiltered
  6. customevaporated
  7. customThe crude product was purified by preparative HPLC

Sources & evidence

ORD record
ord-d1312f49bafd4715a6c1be4ec79d2ae0
Source dataset
uspto-grants-2014_12
Patent number
US08921378B2

Reaction notes

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