Hydrochloric Acid → 2-(1-aminocyclopropyl)-5-(3-(tert-butylamino)-6-fluoro-2-methylquinoxalin-5-yl)-1H-pyrrole-3-carboxylic acid hydrochloride

HRID 1056149Notes

Reaction equation

HRID 1056149 reaction equation
C(OC([NH:8][C:9]1([C:12]2[NH:13][C:14]([C:22]3[C:31]([F:32])=[CH:30][CH:29]=[C:28]4[C:23]=3[N:24]=[C:25]([NH:34][C:35]([CH3:38])([CH3:37])[CH3:36])[C:26]([CH3:33])=[N:27]4)=[CH:15][C:16]=2[C:17]([O:19]CC)=[O:18])[CH2:11][CH2:10]1)=O)(C)(C)C.[ClH:39]>O1CCOCC1.O.CCOCC>[ClH:39].[NH2:8][C:9]1([C:12]2[NH:13][C:14]([C:22]3[C:31]([F:32])=[CH:30][CH:29]=[C:28]4[C:23]=3[N:24]=[C:25]([NH:34][C:35]([CH3:38])([CH3:37])[CH3:36])[C:26]([CH3:33])=[N:27]4)=[CH:15][C:16]=2[C:17]([OH:19])=[O:18])[CH2:10][CH2:11]1

Participants

6

Reactant 2

HCID 313Hydrochloric AcidHCID 89783968ethyl 2-(1-((tert-butoxycarbonyl)amino)cyclopropyl)-5-(3-(tert-butylamino)-6-fluoro-2-methylquinoxalin-5-yl)-1H-pyrrole-3-carboxylate

Product 1

HCID 897832122-(1-aminocyclopropyl)-5-(3-(tert-butylamino)-6-fluoro-2-methylquinoxalin-5-yl)-1H-pyrrole-3-carboxylic acid hydrochlorideYield 95%

Reagents, catalysts & solvents 3

HCID 962WaterSolvent2×HCID 3283Diethyl EtherSolventHCID 312751,4-DioxaneSolvent3×

Conditions

Temperature
110 °C

Procedure

A glass microwave reaction vessel was charged with ethyl 2-(1-((tert-butoxycarbonyl)amino)cyclopropyl)-5-(3-(tert-butylamino)-6-fluoro-2-methylquinoxalin-5-yl)-1H-pyrrole-3-carboxylate (295b) (230 mg, 0.44 mmol) and LiOH monohydrate (Sigma-Aldrich) (184 mg, 4.38 mmol) in dioxane (1.5 mL) and water (0.75 mL). The reaction mixture was heated at 110° C. for 17 h. After cooling to RT, the reaction mixture was diluted with Et2O and water and the layers were separated. The Et2O layer was discarded. The aq. layer was acidified with 2 M HCl and extracted with EtOAc (3×). The combined EtOAc layers were dried over anhydrous Na2SO4, filtered and concentrated to give a light yellow solid. m/z (ESI, +ve) 498.2 (M+H)+. The light yellow solid was dissolved in 1 mL of dioxane and treated with 4.0 M HCl in 1,4-dioxane (Sigma-Aldrich) (5 mL, 20.00 mmol) at RT. After 24 h, the reaction mixture was concentrated and the orange solid was collected by filtration to give 2-(1-aminocyclopropyl)-5-(3-(tert-butylamino)-6-fluoro-2-methylquinoxalin-5-yl)-1H-pyrrole-3-carboxylic acid hydrochloride (295c) (180 mg, 0.42 mmol, 95% yield). m/z (ESI, +ve) 381.1 (M−NH2)+.

Workup

  1. customA glass microwave reaction vessel
  2. temperatureAfter cooling to RT
  3. customthe layers were separated
  4. extractionextracted with EtOAc (3×)
  5. dry with materialThe combined EtOAc layers were dried over anhydrous Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customto give a light yellow solid
  9. concentrationthe reaction mixture was concentrated
  10. filtrationthe orange solid was collected by filtration

Sources & evidence

ORD record
ord-7afe19e5983742aeb1ccba963cc98680
Source dataset
uspto-grants-2016_07
Patent number
US09394297B2

Reaction notes

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