4-Bromobenzoic acid → 4-{4-[4-(3-tert-Butyl-phenylcarbamoyl)-2-fluoro-phenyl]-piperazin-1-yl}-benzoic acid

HRID 2190610Notes

Reaction equation

HRID 2190610 reaction equation
[C:1]([C:5]1[CH:6]=[C:7]([NH:11][C:12](=[O:26])[C:13]2[CH:18]=[CH:17][C:16]([N:19]3[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]3)=[C:15]([F:25])[CH:14]=2)[CH:8]=[CH:9][CH:10]=1)([CH3:4])([CH3:3])[CH3:2].Br[C:28]1[CH:36]=[CH:35][C:31]([C:32]([OH:34])=[O:33])=[CH:30][CH:29]=1.CC([O-])(C)C.[Na+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[C:1]([C:5]1[CH:6]=[C:7]([NH:11][C:12]([C:13]2[CH:18]=[CH:17][C:16]([N:19]3[CH2:20][CH2:21][N:22]([C:28]4[CH:36]=[CH:35][C:31]([C:32]([OH:34])=[O:33])=[CH:30][CH:29]=4)[CH2:23][CH2:24]3)=[C:15]([F:25])[CH:14]=2)=[O:26])[CH:8]=[CH:9][CH:10]=1)([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 114644-Bromobenzoic acidHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 23676156Sodium t-butoxideHCID 59318037N-(3-tert-Butyl-phenyl)-3-fluoro-4-piperazin-1-yl-benzamide

Product 1

HCID 593181934-{4-[4-(3-tert-Butyl-phenylcarbamoyl)-2-fluoro-phenyl]-piperazin-1-yl}-benzoic acid

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
85 °C

Procedure

To a N-(3-tert-butyl-phenyl)-3-fluoro-4-piperazin-1-yl-benzamide (0.15 mmol) solution in dioxane was added 4-bromo-benzoic acid (0.195 mmol), NaOtBu (0.45 mmol), Xantphos (0.03 mmol) and Pd2 dba3 (0.009 mmol). The reaction vial was purged with Ar, sealed, and heated at 85° C. overnight. The reaction was worked up by diluting with methanol adding an excess of NH4Cl, and passing through a plug of silica gel (1 g) and eluting with methanol. The methanol fraction was concentrated. The residue suspended in DMSO, filtered, and purified by reverse phase liquid chromatography with increasing concentrations of CH3CN in water yielding the product 4-{4-[4-(3-tert-butyl-phenylcarbamoyl)-2-fluoro-phenyl]-piperazin-1-yl}-benzoic acid. LCMS calcd for C28H30FN3O3 (m/e) 475, obsd 476 (M+H).

Workup

  1. customThe reaction
  2. customvial was purged with Ar
  3. customsealed
  4. additionby diluting with methanol adding an excess of NH4Cl
  5. washeluting with methanol
  6. concentrationThe methanol fraction was concentrated
  7. filtrationfiltered
  8. custompurified by reverse phase liquid chromatography
  9. temperaturewith increasing concentrations of CH3CN in water yielding the product 4-{4-[4-(3-tert-butyl-phenylcarbamoyl)-2-fluoro-phenyl]-piperazin-1-yl}-benzoic acid

Sources & evidence

ORD record
ord-c63d5a9a45de4564b0cde931eac707e4
Source dataset
uspto-grants-2012_12
Patent number
US08324385B2

Reaction notes

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