Benzenemethanamine, 3-chloro- → t-Butyl 4-(5-(3-chlorobenzylamino)-2-nitrophenyl)piperazine-1-carboxylate

HRID 2425970Notes

Reaction equation

HRID 2425970 reaction equation
F[C:2]1[CH:3]=[CH:4][C:5]([N+:21]([O-:23])=[O:22])=[C:6]([N:8]2[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH2:9]2)[CH:7]=1.[Cl:24][C:25]1[CH:26]=[C:27]([CH:30]=[CH:31][CH:32]=1)[CH2:28][NH2:29].C(N(CC)C(C)C)(C)C>C(#N)C>[Cl:24][C:25]1[CH:26]=[C:27]([CH:30]=[CH:31][CH:32]=1)[CH2:28][NH:29][C:2]1[CH:3]=[CH:4][C:5]([N+:21]([O-:23])=[O:22])=[C:6]([N:8]2[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH2:9]2)[CH:7]=1

Participants

5

Reactant 3

HCID 77802Benzenemethanamine, 3-chloro-HCID 81531DiisopropylethylamineHCID 22272537tert-Butyl 4-(5-Fluoro-2-nitrophenyl)piperazine-1-carboxylate

Product 1

HCID 58707310t-Butyl 4-(5-(3-chlorobenzylamino)-2-nitrophenyl)piperazine-1-carboxylateYield 48%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

t-Butyl 4-(5-fluoro-2-nitrophenyl)piperazine-1-carboxylate (431 mg, 1.3 mmol), 3-chlorobenzylamine (187 mg, 1.3 mmol), N,N-diisopropylethylamine (342 mg, 1.3 mmol) were stirred at 80° C. in dry acetonitrile (25 mL) for 72 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 (277 mg, 48% yield). 1H NMR (400 MHz, CD3OD): δ 7.96 (d, 1H), 7.37-7.26 (m, 4H), 6.29 (d, 1H), 6.18 (s, 1H), 4.42 (s, 2H), 3.55 (m, 4H), 2.92 (m, 4H), 1.47 (s, 9H); MS (ESI) m/z: Calculated for C22H27ClN4O4: 446.17; Observed: 469.2 (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-90c258ac686f4741b17160deba8f59da
Source dataset
uspto-grants-2011_06
Patent number
US07968538B2

Reaction notes

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