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

HRID 855363Notes

Reaction equation

HRID 855363 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]=[CH:60][C:59]([F:62])=[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:65]=[CH:64][C:51]([CH2:52][N:53]([CH2:54][CH2:55][C:56]2[CH:61]=[CH:60][C:59]([F:62])=[C:58]([F:63])[CH:57]=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:50][CH:49]=1)([CH3:47])([CH3:45])[CH3:46]

Participants

7

Reactant 4

HCID 742811H-Indole-7-carboxylic acidHCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 68882968(4-Tert-butyl-benzyl)-[2-(3,4-difluoro-phenyl)-ethyl]-amine

Product 1

HCID 866030671H-Indole-7-carboxylic acid (4-tert-butyl-benzyl)-[2-(3,4-difluoro-phenyl)-ethyl]-amideYield 66%

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-(3,4-difluoro-phenyl)-ethyl]-amine in 2 ml DMF was added. After stirring for 18 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 95 mg light yellow viscous oil (66%). MS (ISP) 447.2 (M+H)+.

Workup

  1. stirringAfter stirring for 18 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-fee193f46bb54a6b8490603904a8800c
Source dataset
uspto-grants-2007_08
Patent number
US07259183B2

Reaction notes

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