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1H-Indole-7-carboxylic acid → 1H-Indole-7-carboxylic acid (4-tert-butyl-benzyl)-[2-(3,5-difluoro-phenyl)-ethyl]-amide

HRID 855361
Notes
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Reaction equation

HRID 855361 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][C:8]=2[C:10]([OH:12])=O)[CH:3]=[CH:2]1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.[B-](F)(F)(F)F.C(N(CC)C(C)C)(C)C.[C:44]([C:48]1[CH:65]=[CH:64][C:51]([CH2:52][NH:53][CH2:54][CH2:55][C:56]2[CH:61]=[C:60]([F:62])[CH:59]=[C:58]([F:63])[CH:57]=2)=[CH:50][CH:49]=1)([CH3:47])([CH3:46])[CH3:45]>CN(C=O)C.O>[C:44]([C:48]1[CH:49]=[CH:50][C:51]([CH2:52][N:53]([CH2:54][CH2:55][C:56]2[CH:57]=[C:58]([F:63])[CH:59]=[C:60]([F:62])[CH:61]=2)[C:10]([C:8]2[CH:7]=[CH:6][CH:5]=[C:4]3[C:9]=2[NH:1][CH:2]=[CH:3]3)=[O:12])=[CH:64][CH:65]=1)([CH3:47])([CH3:45])[CH3:46]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 742811H-Indole-7-carboxylic acidHCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 69342901(4-Tert-butyl-benzyl)-[2-(3,5-difluoro-phenyl)-ethyl]-amine

Product 1

HCID 866030651H-Indole-7-carboxylic acid (4-tert-butyl-benzyl)-[2-(3,5-difluoro-phenyl)-ethyl]-amide
Yield 72.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a solution of 48 mg (0.3 mmol) of 1H-indole-7-carboxylic acid and 96 mg of TBTU (0.3 mmol) in 4 ml DMF, were added 0.26 ml (1.5 mmol) of N,N-diisopropylethyl amine. After stirring for 5 min at rt, 91 mg (0.3 mmol) (4-tert-butyl-benzyl)-[2-(3,5-difluoro-phenyl)-ethyl]-amine in 1 ml DMF was added. After stirring for 4 h at rt, the reaction mixture was diluted with 50 ml water and extracted with 2×50 ml EtOAc. The combined organic phases were washed with water and brine, dried with magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography (8 g silica gel; EtOAc/heptane 1:6) to give 97 mg off-white solid (71%). MS (ISP) 447.3 (M+H)+.

Workup

  1. stirringAfter stirring for 4 h at rt
  2. extractionextracted with 2×50 ml EtOAc
  3. washThe combined organic phases were washed with water and brine
  4. dry with materialdried with magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by column chromatography (8 g silica gel; EtOAc/heptane 1:6)

Sources & evidence

ORD record
ord-7e0325db4d20447a86b6aa9289dd91ff
Source dataset
uspto-grants-2007_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07259183B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes