Diisopropylethylamine → 5,6-Difluoro-1H-indole-7-carboxylic acid (4-tert-butyl-benzyl)-[2-(4-fluoro-3-trifluoromethyl-phenyl)-ethyl]-amide

HRID 855370Notes

Reaction equation

HRID 855370 reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[C:9]([C:12]([OH:14])=O)[C:10]=1[F:11])[NH:7][CH:6]=[CH:5]2.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:46]([C:50]1[CH:70]=[CH:69][C:53]([CH2:54][NH:55][CH2:56][CH2:57][C:58]2[CH:63]=[CH:62][C:61]([F:64])=[C:60]([C:65]([F:68])([F:67])[F:66])[CH:59]=2)=[CH:52][CH:51]=1)([CH3:49])([CH3:48])[CH3:47]>CN(C=O)C.O>[C:46]([C:50]1[CH:70]=[CH:69][C:53]([CH2:54][N:55]([CH2:56][CH2:57][C:58]2[CH:63]=[CH:62][C:61]([F:64])=[C:60]([C:65]([F:67])([F:68])[F:66])[CH:59]=2)[C:12]([C:9]2[C:10]([F:11])=[C:2]([F:1])[CH:3]=[C:4]3[C:8]=2[NH:7][CH:6]=[CH:5]3)=[O:14])=[CH:52][CH:51]=1)([CH3:49])([CH3:47])[CH3:48]

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 2733207O-(Benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborateHCID 68563599(4-Tert-butyl-benzyl)-[2-(4-fluoro-3-trifluoromethyl-phenyl)-ethyl]-amineHCID 693460795,6-difluoro-1H-indole-7-carboxylic acid

Product 1

HCID 866030745,6-Difluoro-1H-indole-7-carboxylic acid (4-tert-butyl-benzyl)-[2-(4-fluoro-3-trifluoromethyl-phenyl)-ethyl]-amideYield 38.8%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a solution of 59 mg (0.3 mmol) of 5,6-difluoro-1H-indole-7-carboxylic acid and 96 mg of TBTU (0.3 mmol) in 3 ml DMF, were added 0.26 ml (1.5 mmol) of N,N-diisopropylethyl amine. After stirring for 5 min at rt, 106 mg (0.3 mmol) of (4-tert-butyl-benzyl)-[2-(4-fluoro-3-trifluoromethyl-phenyl)-ethyl]-amine in 2 ml DMF were added. After stirring for 3 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 two successive column chromatographies (8 g silica gel; EtOAc/heptane 1:4; second column eluted with n-hexane/EtOAc 9:1) to give 62 mg yellow viscous oil (35%). MS (ISP) 533.2 (M+H)+.

Workup

  1. stirringAfter stirring for 3 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 two successive column chromatographies (8 g silica gel; EtOAc/heptane 1:4; second column eluted with n-hexane/EtOAc 9:1)

Sources & evidence

ORD record
ord-bbea25f83d224075a31d1afdede96e20
Source dataset
uspto-grants-2007_08
Patent number
US07259183B2

Reaction notes

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