Diisopropylethylamine → t-Butyl 4-(3-(1-(3,5-dimethoxyphenyl)ethylamino)-4-(2,2,2-trifluoroacetyl)phenyl)piperazine-1-carboxylate

HRID 2425986Notes

Reaction equation

HRID 2425986 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]([NH:13][C:14]2[CH:19]=[C:18](F)[CH:17]=[CH:16][C:15]=2[C:21](=[O:26])[C:22]([F:25])([F:24])[F:23])[CH3:12])[CH:6]=[C:7]([O:9][CH3:10])[CH:8]=1.[N:27]1([C:33]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])[CH2:32][CH2:31][NH:30][CH2:29][CH2:28]1.C(N(CC)C(C)C)(C)C>C(#N)C>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:11]([NH:13][C:14]2[CH:19]=[C:18]([N:30]3[CH2:29][CH2:28][N:27]([C:33]([O:35][C:36]([CH3:39])([CH3:38])[CH3:37])=[O:34])[CH2:32][CH2:31]3)[CH:17]=[CH:16][C:15]=2[C:21](=[O:26])[C:22]([F:25])([F:24])[F:23])[CH3:12])[CH:6]=[C:7]([O:9][CH3:10])[CH:8]=1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 143452tert-Butyl piperazine-1-carboxylateHCID 587072861-(2-(1-(3,5-Dimethoxyphenyl)ethylamino)-4-fluorophenyl)-2,2,2-trifluoroethanone

Product 1

HCID 58707263t-Butyl 4-(3-(1-(3,5-dimethoxyphenyl)ethylamino)-4-(2,2,2-trifluoroacetyl)phenyl)piperazine-1-carboxylateYield 27%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

1-(2-(1-(3,5-Dimethoxyphenyl)ethylamino)-4-fluorophenyl)-2,2,2-trifluoroethanone (600 mg, 1.62 mmol), t-butyl piperazine-1-carboxylate (300 mg, 1.62 mmol), N,N-diisopropylethylamine (418 mg, 3.24 mmol) were stirred at 80° C. in dry acetonitrile (25 mL) for 21 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 20% ethyl acetate in hexanes to afford the title compound (231 mg, 27% yield). 1H NMR (400 MHz, CDCl3): δ 9.30 (d, 1H), 7.59 (d, 1H), 6.48 (s, 2H), 6.33 (s, 1H), 6.13 (d, 1H), 5.68 (s, 1H), 4.44 (m, 1H), 3.43 (m, 4H), 3.25 (m, 2H), 3.20 (m, 2H), 1.59 (d, 3H), 1.46 (s, 9H); MS (ESI) m/z: Calculated for C27H34F3N3O5: 537.25; Observed: 560.3 (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-d84ec81760c94bd9ab632ed8d11ca0df
Source dataset
uspto-grants-2011_06
Patent number
US07968538B2

Reaction notes

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