Ethyl 4-bromobutyrate → HCID 67142904, compound

HRID 574257Notes

Reaction equation

HRID 574257 reaction equation
[NH2:1][C@H:2]([C:41]1[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1)[CH2:3][N:4]1[C:9](=[O:10])[C:8]([N:11]2[CH2:16][CH2:15][N:14]([CH2:17][C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([N+:24]([O-:26])=[O:25])[CH:19]=3)[CH2:13][CH2:12]2)=[C:7]([CH3:27])[N:6]([CH2:28][C:29]2[C:34]([C:35]([F:38])([F:37])[F:36])=[CH:33][CH:32]=[CH:31][C:30]=2[F:39])[C:5]1=[O:40].C(N(CC)C(C)C)(C)C.[CH2:56]([O:58][C:59](=[O:64])[CH2:60][CH2:61][CH2:62]Br)[CH3:57]>C(#N)C.ClCCl>[CH2:56]([O:58][C:59](=[O:64])[CH2:60][CH2:61][CH2:62][NH:1][C@H:2]([C:41]1[CH:42]=[CH:43][CH:44]=[CH:45][CH:46]=1)[CH2:3][N:4]1[C:9](=[O:10])[C:8]([N:11]2[CH2:12][CH2:13][N:14]([CH2:17][C:18]3[CH:23]=[CH:22][CH:21]=[C:20]([N+:24]([O-:26])=[O:25])[CH:19]=3)[CH2:15][CH2:16]2)=[C:7]([CH3:27])[N:6]([CH2:28][C:29]2[C:34]([C:35]([F:38])([F:36])[F:37])=[CH:33][CH:32]=[CH:31][C:30]=2[F:39])[C:5]1=[O:40])[CH3:57]

Participants

6

Reactant 3

HCID 76300Ethyl 4-bromobutyrateHCID 81531DiisopropylethylamineHCID 67142732HCID 67142732, compound

Product 1

HCID 67142904HCID 67142904, compoundYield 33%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
95 °C

Procedure

To a solution of 3-((R)-2-amino-2-phenyl-ethyl)-1-(2-fluoro-6-trifluoromethyl-benzyl)-6-methyl-5-[4-(3-nitro-benzyl)-piperazin-1-yl]-1H-pyrimidine-2,4-dione (3-58) (55 mg, 0.086 mmol) in acetonitrile (2 mL) were added N,N-diisopropylethylamine (37 μl, 0.271 mmol) and 4-bromo-butyric acid ethyl ester (15 μl, 0.086 mmol) in the order, followed by stirring at 95° C. for 12 hrs. The solution was cooled to room temperature, diluted with dichloromethane and washed with an aqueous saturated sodium bicarbonate solution. The organic layer thus formed was separated and concentrated. The residue was purified using silica gel chromatography (eluent: dichloromethane/methanol, 30/1) and dried in a vacuum to afford 21 mg of the compound as a colorless oil (yield 33%). 1H NMR (300 MHz, CDCl3) δ 1.19 (3H, t), 1.65 (2H, m), 2.24 (4H, m), 2.33 (3H, s), 2.37-2.50 (4H, m), 2.74 (2H, m), 3.60 (4H, m), 4.02-4.09 (4H, m), 4.16 (1H, m), 5.40 (2H, dd), 7.20-7.40 (7H, m), 7.49 (1H, t), 7.53 (1H, d), 7.76 (1H, d), 8.10 (1H, dd), 8.18 (1H, s)

Workup

  1. temperatureThe solution was cooled to room temperature
  2. washwashed with an aqueous saturated sodium bicarbonate solution
  3. customThe organic layer thus formed
  4. customwas separated
  5. concentrationconcentrated
  6. customThe residue was purified
  7. customdried in a vacuum

Sources & evidence

ORD record
ord-49cc44dd809c4bb2a5e93ece508fb020
Source dataset
uspto-grants-2015_05
Patent number
US09034850B2

Reaction notes

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