Acetic Acid → tert-butyl 4-[(2-{4-[(7-chloro-4-methyl-1H-indol-5-yl)amino]-5-cyanopyridin-3-yl}-1-benzofuran-5-yl)methyl]piperazine-1-carboxylate

HRID 506204Notes

Reaction equation

HRID 506204 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([NH:12][C:13]2[C:18]([C:19]#[N:20])=[CH:17][N:16]=[CH:15][C:14]=2[C:21]2[O:22][C:23]3[CH:29]=[CH:28][C:27]([CH:30]=O)=[CH:26][C:24]=3[CH:25]=2)[C:5]([CH3:11])=[C:6]2[C:10]=1[NH:9][CH:8]=[CH:7]2.[N:32]1([C:38]([O:40][C:41]([CH3:44])([CH3:43])[CH3:42])=[O:39])[CH2:37][CH2:36][NH:35][CH2:34][CH2:33]1.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C1COCC1.CCO>[Cl:1][C:2]1[CH:3]=[C:4]([NH:12][C:13]2[C:18]([C:19]#[N:20])=[CH:17][N:16]=[CH:15][C:14]=2[C:21]2[O:22][C:23]3[CH:29]=[CH:28][C:27]([CH2:30][N:35]4[CH2:36][CH2:37][N:32]([C:38]([O:40][C:41]([CH3:44])([CH3:43])[CH3:42])=[O:39])[CH2:33][CH2:34]4)=[CH:26][C:24]=3[CH:25]=2)[C:5]([CH3:11])=[C:6]2[C:10]=1[NH:9][CH:8]=[CH:7]2

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 143452tert-Butyl piperazine-1-carboxylateHCID 5049666Sodium triacetoxyborohydrideHCID 866168374-[(7-chloro-4-methyl-1H-indol-5-yl)amino]-5-(5-formyl-1-benzofuran-2-yl)nicotinonitrile

Product 1

HCID 68463392tert-butyl 4-[(2-{4-[(7-chloro-4-methyl-1H-indol-5-yl)amino]-5-cyanopyridin-3-yl}-1-benzofuran-5-yl)methyl]piperazine-1-carboxylateYield 73%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of 4-[(7-chloro-4-methyl-1H-indol-5-yl)amino]-5-(5-formyl-1-benzofuran-2-yl)nicotinonitrile (200 mg, 0.47 mmol) in THF (5 mL) and EtOH (2 mL) was added tert-butyl 1-piperazinecarboxylate (262 mg, 1.41 mmol) and acetic acid (54 mg, 0.9 mmol) and the reaction mixture was stirred at room temperature for 1 h. Sodium triacetoxyborohydride (398 mg, 1.88 mmol) was added to the reaction mixture and the resulting solution was stirred at room temperature overnight. After the reaction was concentrated, ethyl acetate was added; and the organic phase was washed with saturated aqueous sodium bicarbonate solution and saturated aqueous sodium chloride solution, dried over magnesium sulfate, and concentrated. The residue was purified by flash column chromatography (ethyl acetate/hexane) to give tert-butyl 4-[(2-{4-[(7-chloro-4-methyl-1H-indol-5-yl)amino]-5-cyanopyridin-3-yl}-1-benzofuran-5-yl)methyl]piperazine-1-carboxylate as a yellow solid (203 mg, 73%). HPLC retention time: 9.5 min.(g); MS: 597.4 (M+H); and HRMS: 597.2378.

Workup

  1. stirringthe resulting solution was stirred at room temperature overnight
  2. concentrationAfter the reaction was concentrated
  3. additionethyl acetate was added
  4. washand the organic phase was washed with saturated aqueous sodium bicarbonate solution and saturated aqueous sodium chloride solution
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated
  7. customThe residue was purified by flash column chromatography (ethyl acetate/hexane)

Sources & evidence

ORD record
ord-5d14978b66a34dd09e1b922cf057c68e
Source dataset
uspto-grants-2010_08
Patent number
US07781591B2

Reaction notes

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