Diisopropylethylamine → t-Butyl 4-(3-(1-(3-chlorophenyl)ethylamino)-4-nitrophenyl)piperazine-1-carboxylate

HRID 2425976Notes

Reaction equation

HRID 2425976 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH:8]([NH:10][C:11]2[CH:16]=[C:15](F)[CH:14]=[CH:13][C:12]=2[N+:18]([O-:20])=[O:19])[CH3:9])[CH:5]=[CH:6][CH:7]=1.[N:21]1([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:26][CH2:25][NH:24][CH2:23][CH2:22]1.C(N(CC)C(C)C)(C)C>C(#N)C>[Cl:1][C:2]1[CH:3]=[C:4]([CH:8]([NH:10][C:11]2[CH:16]=[C:15]([N:24]3[CH2:23][CH2:22][N:21]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:26][CH2:25]3)[CH:14]=[CH:13][C:12]=2[N+:18]([O-:20])=[O:19])[CH3:9])[CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 58707308N-(1-(3-Chlorophenyl)ethyl)-5-fluoro-2-nitrobenzenamine

Product 1

HCID 58707320t-Butyl 4-(3-(1-(3-chlorophenyl)ethylamino)-4-nitrophenyl)piperazine-1-carboxylateYield 12%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

N-(1-(3-Chlorophenyl)ethyl)-5-fluoro-2-nitrobenzenamine (522 mg, 1.8 mmol), t-butyl piperazine-1-carboxylate (329 mg, 1.8 mmol), N,N-diisopropylethylamine (457 mg, 3.5 mmol) were stirred at 90° C. in dry acetonitrile (50 mL) for 24 h. The solvent was evaporated and the residue was dissolved in dichloromethane and washed with water. The dichloromethane was evaporated and the crude compound was purified by silica chromatography using 25% ethyl acetate in hexanes to afford the title compound (95 mg, 12% yield). 1H NMR (400 MHz, CDCl3): δ 8.70 (s, 1H), 8.06 (d, 1H), 7.33-7.21 (m, 4H), 6.15 (d, 1H), 5.58 (s, 1H), 4.53 (m, 1H), 3.43 (m, 4H), 3.21 (m, 2H), 3.13 (m, 2H), 1.63 (d, 3H), 1.46 (s, 9H); MS (ESI) m/z: Calculated for C23H29ClN4O4: 460.19; Observed: 483.3 (M++Na).

Workup

  1. customThe solvent was evaporated
  2. dissolutionthe residue was dissolved in dichloromethane
  3. washwashed with water
  4. customThe dichloromethane was evaporated
  5. customthe crude compound was purified by silica chromatography

Sources & evidence

ORD record
ord-fbbffda20f1443fd9548f70f087fa306
Source dataset
uspto-grants-2011_06
Patent number
US07968538B2

Reaction notes

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