Pyridine → tert-butyl 2-((R)-2-(4-chloro-1H-pyrazol-1-yl)propanamido)-6-((R)-3-(pyrrolidine-1-carbonyl)piperidin-1-yl)pyridin-3-ylcarbamate

HRID 931285Notes

Reaction equation

HRID 931285 reaction equation
[Cl:1][C:2]1[CH:3]=[N:4][N:5]([C@H:7]([CH3:11])[C:8]([OH:10])=O)[CH:6]=1.[NH2:12][C:13]1[C:18]([NH:19][C:20](=[O:26])[O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[CH:17][CH:16]=[C:15]([N:27]2[CH2:32][CH2:31][CH2:30][C@@H:29]([C:33]([N:35]3[CH2:39][CH2:38][CH2:37][CH2:36]3)=[O:34])[CH2:28]2)[N:14]=1.N1C=CC=CC=1.CCCP1(OP(CCC)(=O)OP(CCC)(=O)O1)=O>C(OCC)(=O)C>[Cl:1][C:2]1[CH:3]=[N:4][N:5]([C@H:7]([CH3:11])[C:8]([NH:12][C:13]2[C:18]([NH:19][C:20](=[O:26])[O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[CH:17][CH:16]=[C:15]([N:27]3[CH2:32][CH2:31][CH2:30][C@@H:29]([C:33]([N:35]4[CH2:39][CH2:38][CH2:37][CH2:36]4)=[O:34])[CH2:28]3)[N:14]=2)=[O:10])[CH:6]=1

Participants

6

Reactant 4

HCID 1049PyridineHCID 111923Propylphosphonic anhydrideHCID 7017611(2R)-2-(4-chloropyrazol-1-yl)propanoic acidHCID 89857073(R)-tert-Butyl 2-amino-6-(3-(pyrrolidine-1-carbonyl)piperidin-1-yl)pyridin-3-ylcarbamate

Product 1

HCID 117966285tert-butyl 2-((R)-2-(4-chloro-1H-pyrazol-1-yl)propanamido)-6-((R)-3-(pyrrolidine-1-carbonyl)piperidin-1-yl)pyridin-3-ylcarbamateYield 98.2%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

(R)-2-(4-Chloro-1H-pyrazol-1-yl)propanoic acid (105 mg, 0.60 mmol) and (R)-tert-butyl 2-amino-6-(3-(pyrrolidine-1-carbonyl)piperidin-1-yl)pyridin-3-ylcarbamate (195 mg, 0.50 mmol) were dissolved in ethyl acetate (0.5 mL) with pyridine (0.20 mL, 2.5 mmol) at room temperature. The mixture was cooled to 0° C. 1-Propanephosphonic acid cyclic anhydride (0.375 mL, 50% solution in ethyl acetate, 1.25 mmol) was added while stirring at 0° C. The resulting mixture was stirred for 15 min, and then warmed to room temperature. After stirring for 1.5 h at room temperature, the mixture was quenched with an aqueous solution of hydrochloric acid (0.5 M, 1 mL). The mixture was partitioned between ethyl acetate (10 mL) and water (5 mL). The organic layer was washed sequentially with water (5 mL), a saturated aqueous solution of sodium bicarbonate (5 mL), and brine (5 mL). The organics were dried over magnesium sulfate, filtered, and concentrated. The residue was dried under reduced pressure to afford tert-butyl 2-((R)-2-(4-chloro-1H-pyrazol-1-yl)propanamido)-6-((R)-3-(pyrrolidine-1-carbonyl)piperidin-1-yl)pyridin-3-ylcarbamate (268 mg, 98% yield). 1H NMR (500 MHz, CDCl3) δ 1.48 (s, 9H), 1.48-1.55 (m, 1H), 1.73-1.76 (m, 1H), 1.80-2.05 (m, 6H), 1.86 (d, 3H), 2.53-2.59 (m, 1H), 2.84-2.90 (m, 1H), 2.96-3.01 (m, 1H), 3.43-3.51 (m, 3H), 3.55-3.60 (m, 1H), 4.12 (br d, 1H), 4.33 (br d, 1H), 5.10 (br s, 1H), 6.56 (d, 1H), 7.30 (br s, 1H), 7.57 (s, 1H), 7.61 (s, 1H), 7.76 (br s, 1H), 8.58 (br s, 1H); MS (ES+) (M+H) 546.3; Chiral HPLC retention time 4.61 min (Method: Chiralpak AS-H 0.46×25 cm; Mobile Phase: CO2/methanol; Flow: 2.5 mL/min); 97.1% de.

Workup

  1. stirringThe resulting mixture was stirred for 15 min
  2. temperaturewarmed to room temperature
  3. stirringAfter stirring for 1.5 h at room temperature
  4. customthe mixture was quenched with an aqueous solution of hydrochloric acid (0.5 M, 1 mL)
  5. customThe mixture was partitioned between ethyl acetate (10 mL) and water (5 mL)
  6. washThe organic layer was washed sequentially with water (5 mL)
  7. dry with materialThe organics were dried over magnesium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe residue was dried under reduced pressure

Sources & evidence

ORD record
ord-0daa8f80620647bb9a5462824c963943
Source dataset
uspto-grants-2016_03
Patent number
US09296745B2

Reaction notes

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