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HOAt → {(S)-1-[4-fluoro-2-(pyridin-3-ylamino)phenylcarbamoyl]propyl}carbamic acid tert-butyl ester

HRID 242969
Notes
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Reaction equation

HRID 242969 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([NH:9][C:10]2[CH:11]=[N:12][CH:13]=[CH:14][CH:15]=2)[C:5]([NH2:8])=[CH:6][CH:7]=1.[C:16]([O:20][C:21]([NH:23][C@@H:24]([CH2:28][CH3:29])[C:25](O)=[O:26])=[O:22])([CH3:19])([CH3:18])[CH3:17].C1C=NC2N(O)N=NC=2C=1.Cl.CN(C)CCCN=C=NCC>C(Cl)Cl>[C:16]([O:20][C:21](=[O:22])[NH:23][C@H:24]([C:25](=[O:26])[NH:8][C:5]1[CH:6]=[CH:7][C:2]([F:1])=[CH:3][C:4]=1[NH:9][C:10]1[CH:11]=[N:12][CH:13]=[CH:14][CH:15]=1)[CH2:28][CH3:29])([CH3:17])([CH3:18])[CH3:19]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 181649HOAtHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 2755934(S)-2-((tert)-Butoxycarbonyl)amino)butanoic acidHCID 584592164-Fluoro-N2-pyridin-3-ylbenzene-1,2-diamine

Product 1

HCID 68157109{(S)-1-[4-fluoro-2-(pyridin-3-ylamino)phenylcarbamoyl]propyl}carbamic acid tert-butyl ester
Yield 75%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 4-fluoro-N2-pyridin-3-ylbenzene-1,2-diamine (0.594 g, 2.9 mmol) in DCM (18 mL) at 0° C. were added (S)-2-tertbutoxycarbonylaminobutyric acid (650 mg, 3.2 mmol), HOAt (440 mg, 3.2 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (610 mg, 3.2 mmol) and the reaction mixture stirred at 0° C. for 2 h. The crude mixture was partitioned between DCM and a saturated aqueous solution of NaHCO3. The organic phase was washed with brine, dried (MgSO4), concentrated in vacuo and the resulting residue purified by column chromatography (Si—PCC, gradient 0-60% EtOAc in cyclohexane) to afford {(S)-1-[4-fluoro-2-(pyridin-3-ylamino)phenylcarbamoyl]propyl}carbamic acid tert-butyl ester (839 mg, 75%). LCMS (Method J): RT 0.69 min [M+H]+ 389.2.

Workup

  1. customThe crude mixture was partitioned between DCM
  2. washThe organic phase was washed with brine
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated in vacuo
  5. customthe resulting residue purified by column chromatography (Si—PCC, gradient 0-60% EtOAc in cyclohexane)

Sources & evidence

ORD record
ord-8aa39074392a4974b5e288b1405134ea
Source dataset
uspto-grants-2014_02
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08653089B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes