Potassium Phosphate, Tribasic → 5-(4'-fluoro-biphenyl-2-yl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

HRID 715158Notes

Reaction equation

HRID 715158 reaction equation
Br[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[N:8]1[C:16]2[CH:15]=[CH:14][C:13]([CH3:17])=[CH:12][C:11]=2[C:10]2[CH2:18][N:19]([CH3:22])[CH2:20][CH2:21][C:9]1=2.[F:23][C:24]1[CH:29]=[CH:28][C:27](B(O)O)=[CH:26][CH:25]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>CN(C=O)C.O.O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[F:23][C:24]1[CH:29]=[CH:28][C:27]([C:2]2[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=2[N:8]2[C:16]3[CH:15]=[CH:14][C:13]([CH3:17])=[CH:12][C:11]=3[C:10]3[CH2:18][N:19]([CH3:22])[CH2:20][CH2:21][C:9]2=3)=[CH:26][CH:25]=1

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 2856454-Fluorophenylboronic acidHCID 673790385-(2-bromo-phenyl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

Product 1

HCID 673787515-(4'-fluoro-biphenyl-2-yl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indoleYield 18.4%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolventHCID 21962138N,N-Dimethylformamide--water (1/1)Solvent

Conditions

Temperature
95 °C

Procedure

To a de-aerated solution of 5-(2-bromo-phenyl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (100 mg, 0.282 mmol), 4-fluorophenylboronic acid (59 mg, 0.423 mmol) and K3PO4 (149 mg, 0.706 mmol) in DMF-water (4:1 mL) was added PdCl2(PPh3)2 (10 mg, 5 mol %). The reaction mixture was heated at 95° C. for 30 min under nitrogen atmosphere. The reaction mixture was diluted with water and extracted with EtOAc. The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to yield crude, which was purified by reverse phase HPLC to yield 5-(4′-fluorobiphenyl-2-yl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole as semisolid (19.23 mg). 1H NMR (Oxalate salt, CD3OD) d (ppm): 7.65-7.59 (m, 3H), 7.41 (d, 1H), 7.25 (s, 1H), 7.15 (m, 1H), 7.05-6.85 (m, 5H), 4.5-3.39 (m, 2H), 3.6-3.5 (m, 1H), 3.2-3.19 (m, 1H), 2.95 (s, 3H), 2.85-2.8 (m, 1H), 2.59-2.50 (m, 1H), 2.4 (s, 3H).

Workup

  1. extractionextracted with EtOAc
  2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customto yield crude, which
  5. customwas purified by reverse phase HPLC

Sources & evidence

ORD record
ord-40ee86e2491d4a7cbc06bf8ec88ca541
Source dataset
uspto-grants-2015_11
Patent number
US09187471B2

Reaction notes

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