Pyrrole-2-carboxaldehyde → 2-Oxo-3-(1h-pyrrol-2-ylmethylene)-2,3-dihydro-1h-indole-6-carboxylic acid (3-benzoylamino-phenyl)-amide

HRID 422014Notes

Reaction equation

HRID 422014 reaction equation
[C:1]([NH:9][C:10]1[CH:11]=[C:12]([NH:16][C:17]([C:19]2[CH:27]=[C:26]3[C:22]([CH2:23][C:24](=[O:28])[NH:25]3)=[CH:21][CH:20]=2)=[O:18])[CH:13]=[CH:14][CH:15]=1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH:29]1[CH:33]=[CH:32][CH:31]=[C:30]1[CH:34]=O>C(O)C.N1CCCCC1>[C:1]([NH:9][C:10]1[CH:11]=[C:12]([NH:16][C:17]([C:19]2[CH:27]=[C:26]3[C:22]([C:23](=[CH:34][C:30]4[NH:29][CH:33]=[CH:32][CH:31]=4)[C:24](=[O:28])[NH:25]3)=[CH:21][CH:20]=2)=[O:18])[CH:13]=[CH:14][CH:15]=1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 2

HCID 13854Pyrrole-2-carboxaldehydeHCID 666754952-oxo-2,3-dihydro-1H-indole-6-carboxylic acid (3-benzoylamino-phenyl)-amide

Product 1

HCID 666747902-Oxo-3-(1h-pyrrol-2-ylmethylene)-2,3-dihydro-1h-indole-6-carboxylic acid (3-benzoylamino-phenyl)-amide

Reagents, catalysts & solvents 2

HCID 8082PiperidineCatalystHCID 702EthanolSolvent

Procedure

To a solution of 2-oxo-2,3-dihydro-1H-indole-6-carboxylic acid (0.20 g, 1.1 mmol) in DMF (1 ml) is added N-(3-amino-phenyl)-benzamide (0.26 g, 1.2 mmol), N,N-diisopropylethylamine (0.44 g, 3.4 mmol) and HATU (0.47 g, 1.24 mmol). The reaction is stirred for 20 hours and concentrated. The residue is purified by HPLC (C18 column, eluted with CH3CN—H2O containing 0.05% TFA) to give 2-oxo-2,3-dihydro-1H-indole-6-carboxylic acid (3-benzoylamino-phenyl)-amide as off-white solid. This amide (15 mg, 0.04 mmol) is then heated with 1H-pyrrole-2-carbaldehyde (6.0 mg, 0.06 mmol) in ethanol (2 ml) in the presence of 2 drops of piperidine at 80° C. for 20 hours. The mixture is concentrated and the desired compound is obtained after HPLC purification: 1H NMR (DMSO-d6) δ 6.41 (s, 1H), 6.93 (s, 1H), 7.31 (t, 1H, J=7.8 Hz), 7.44 (s, 1H), 7.48-7.51 (m, 3H), 7.54 (t, 2H, J=7.2 Hz), 7.59 (d, 1H, J=6.6 Hz), 7.70 (d, 1H, J=8.4 Hz), 7.78 (d, 1H, J=8.4 Hz), 7.92 (s, 1H), 7.98 (d, 2H, J=7.2 Hz), 8.33 (s, 1H), 10.27 (s, 1H), 10.31 (s, 1H), 11.13 (s, 1H), 13.38 (s, 1H); LC-MS: 449.1 (MH+).

Workup

  1. concentrationThe mixture is concentrated

Sources & evidence

ORD record
ord-50bffd2ee01841a18210610b8347474a
Source dataset
uspto-grants-2012_01
Patent number
US08101608B2

Reaction notes

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