1-Hydroxybenzotriazole → Biphenyl-4-carboxylicacid {2-[4-(2-chloro-pyridine-3-carbonyl)-piperazin-1-yl]-2-oxo-ethyl}-amide

HRID 1178096Notes

Reaction equation

HRID 1178096 reaction equation
CCN(C(C)C)C(C)C.[Cl:10][C:11]1[N:19]=[CH:18][CH:17]=[CH:16][C:12]=1[C:13]([OH:15])=O.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.Cl.[O:42]=[C:43]([N:60]1[CH2:65][CH2:64][NH:63][CH2:62][CH2:61]1)[CH2:44][NH:45][C:46]([C:48]1[CH:53]=[CH:52][C:51]([C:54]2[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=2)=[CH:50][CH:49]=1)=[O:47]>CN(C=O)C.O>[Cl:10][C:11]1[C:12]([C:13]([N:63]2[CH2:62][CH2:61][N:60]([C:43](=[O:42])[CH2:44][NH:45][C:46]([C:48]3[CH:53]=[CH:52][C:51]([C:54]4[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=4)=[CH:50][CH:49]=3)=[O:47])[CH2:65][CH2:64]2)=[O:15])=[CH:16][CH:17]=[CH:18][N:19]=1

Participants

8

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 762582-Chloronicotinic acidHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 57855677Biphenyl-4-carboxylicacid (2-oxo-2-piperazin-1-yl-ethyl)-amide

Product 1

HCID 59559610Biphenyl-4-carboxylicacid {2-[4-(2-chloro-pyridine-3-carbonyl)-piperazin-1-yl]-2-oxo-ethyl}-amideYield 32.8%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

DIPEA (149.8 mg, 1.15 mmol) was added to a stirred solution of 2-chloro-nicotinic acid (40.5 mg, 0.26 mmol) in DMF (3 mL), HOBt (38.2 mg, 0.28 mmol) and EDCI.HCl (123.4 mg, 0.64 mmol) at room temperature. After 2 minutes biphenyl-4-carboxylicacid (2-oxo-2-piperazin-1-yl-ethyl)-amide (100 mg, 0.31 mmol) was added and the resulting mixture was stirred at room temperature overnight. Cold water was then added, and the resulting precipitate was filtered. The residue was purified by column chromatography (using 60-120 mesh silica gel and 90% EtOAc in hexane as eluent) to afford 39 mg (32.8% yield) of biphenyl-4-carboxylicacid {2-[4-(2-chloro-pyridine-3-carbonyl)-piperazin-1-yl]-2-oxo-ethyl}-amide, LC-MS purity: 89.81%, 1H NMR: (DMSO) δ 8.74-8.62 (bs, 1H), 8.56-8.46 (bs, 1H), 8.06-7.92 (d, 3H), 7.84-7.7 (q, 4H), 7.6-7.38 (m, 4H), 4.28-4.12 (d, 2H), 3.78-3.46 (bt, 6H), 3.28-3.18 (bs, 2H).

Workup

  1. filtrationthe resulting precipitate was filtered
  2. customThe residue was purified by column chromatography (using 60-120 mesh silica gel and 90% EtOAc in hexane as eluent)

Sources & evidence

ORD record
ord-a1631367b2b3478984adf3098881a9ff
Source dataset
uspto-grants-2010_11
Patent number
US07842696B2

Reaction notes

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