N-bromobutanimide → HCID 71730635, compound

HRID 1056227Notes

Reaction equation

HRID 1056227 reaction equation
[C:1]([NH:5][C:6]1[C:7]([CH3:26])=[N:8][C:9]2[C:14]([N:15]=1)=[C:13]([C:16]1[NH:24][C:23]3[CH2:22][CH2:21][NH:20][C:19](=[O:25])[C:18]=3[CH:17]=1)[CH:12]=[CH:11][CH:10]=2)([CH3:4])([CH3:3])[CH3:2].[Br:27]N1C(=O)CCC1=O>C(Cl)(Cl)Cl.C(Cl)Cl>[Br:27][C:17]1[C:18]2[C:19](=[O:25])[NH:20][CH2:21][CH2:22][C:23]=2[NH:24][C:16]=1[C:13]1[CH:12]=[CH:11][CH:10]=[C:9]2[C:14]=1[N:15]=[C:6]([NH:5][C:1]([CH3:4])([CH3:3])[CH3:2])[C:7]([CH3:26])=[N:8]2

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 71731146HCID 71731146, compound

Product 1

HCID 71730635HCID 71730635, compoundYield 62%

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 6344DichloromethaneSolvent

Procedure

A solution of 2-(3-(tert-butylamino)-2-methylquinoxalin-5-yl)-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-one (193) (0.30 g, 0.86 mmol) and 1-bromopyrrolidine-2,5-dione (0.23 g, 1.28 mmol) in CHCl3 (8.6 mL) was stirred at RT for 3 h. The reaction mixture was diluted with DCM (150 mL), added to a separatory funnel, and washed with saturated aq. NaHCO3 (3×150 mL); the organic layer was separated, dried over Na2SO4, and concentrated. The crude product was directly injected onto the column and was purified via automated flash chromatography (silica gel) with 1-4% of 2 M NH3 in MeOH/DCM to give 3-bromo-2-(3-(tert-butylamino)-2-methylquinoxalin-5-yl)-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-one (349) (228 mg, 0.53 mmol, 62% yield) as a yellow solid. 1H NMR (400 MHz, CDCl3) δ ppm 1.60 (s, 9H) 2.55 (s, 3H) 2.97 (t, J=6.85 Hz, 2H) 3.61 (td, J=6.85, 2.74 Hz, 2H) 4.85 (s, 1H) 5.51 (br. s., 1H) 7.44 (t, J=7.92 Hz, 1H) 7.74 (dd, J=8.02, 1.37 Hz, 1H) 8.71 (dd, J=7.63, 1.37 Hz, 1H) 12.28 (br. s., 1H). MS (ESI, pos. ion) m/z: 428.0/430.1 (M+1).

Workup

  1. additionadded to a separatory funnel
  2. washwashed with saturated aq. NaHCO3 (3×150 mL)
  3. customthe organic layer was separated
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated
  6. customwas purified

Sources & evidence

ORD record
ord-783e64e9855448419825c75dc5dda1d1
Source dataset
uspto-grants-2016_07
Patent number
US09394297B2

Reaction notes

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