1,10-Phenanthroline → 9-((4-chlorophenyl)ethynyl)-1-ethyl-2,6-dimethyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole

HRID 1775984Notes

Reaction equation

HRID 1775984 reaction equation
[CH3:1][N:2]1[CH2:14][CH2:13][C:12]2[C:11]3[C:6](=[CH:7][CH:8]=[C:9]([CH3:15])[CH:10]=3)[NH:5][C:4]=2[CH:3]1[C:16]1C=CC=C[CH:17]=1.N1C2C(=CC=C3C=2N=CC=C3)C=CC=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+].Br[C:45]#[C:46][C:47]1[CH:52]=[CH:51][C:50]([Cl:53])=[CH:49][CH:48]=1>C1(C)C=CC=CC=1>[Cl:53][C:50]1[CH:51]=[CH:52][C:47]([C:46]#[C:45][N:5]2[C:6]3[C:11](=[CH:10][C:9]([CH3:15])=[CH:8][CH:7]=3)[C:12]3[CH2:13][CH2:14][N:2]([CH3:1])[CH:3]([CH2:16][CH3:17])[C:4]2=3)=[CH:48][CH:49]=1

Participants

6

Reactant 4

HCID 13181,10-PhenanthrolineHCID 62657Potassium Phosphate, TribasicHCID 6403901-(Bromoethynyl)-4-chlorobenzeneHCID 66911787HCID 66911787, compound

Product 1

HCID 579304799-((4-chlorophenyl)ethynyl)-1-ethyl-2,6-dimethyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Conditions

Temperature
80 °C

Procedure

2,6-dimethyl-1-phenyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole (276 mg, 1 mmol) was mixed with CuSO4.5H2O (50 mg, 0.2 mmol), 1,10-phenanthroline (72 mg, 0.4 mmol), K3PO4 (425 mg, 2 mmol) and 1-(bromoethynyl)-4-chlorobenzene (237 mg, 1.1 mmol) in toluene (8-10 ml). The reaction mixture was flushed with nitrogen and heated at 80° C. for 16 h. The reaction mixture was filtered through Celite, and the Celite bed was rinsed with dichloromethane. Combined organic layer was concentrated under reduced pressure and the residue was purified by silica gel chromatography (100-200 mesh) eluting with 60-80% ethyl acetate in hexane to obtain 9-((4-chlorophenyl)ethynyl)-1-ethyl-2,6-dimethyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole as brown semi solid (90 mg). The product was dissolved in 50% aqueous TFA:acetonitrile (1:1) and stirred at 50° C. to obtain the title compound as TFA salt (off white solid). 1H NMR (CD300D) TFA SALT 7.65 (d, 1H), 7.45-7.3 (m, 4H), 7.2 (m, 3H), 7.05 (m, 2H), 6.7 (d, 2H), 6.25 (s, 1H), 4.25 (d, 1H), 4.15 (d, 1H), 3.4 (m, 2H), 3.2 (m, 2H), 2.9 (bs, 3), 2.4 (s, 3H).

Workup

  1. customThe reaction mixture was flushed with nitrogen
  2. filtrationThe reaction mixture was filtered through Celite
  3. washthe Celite bed was rinsed with dichloromethane
  4. concentrationCombined organic layer was concentrated under reduced pressure
  5. customthe residue was purified by silica gel chromatography (100-200 mesh)
  6. washeluting with 60-80% ethyl acetate in hexane

Sources & evidence

ORD record
ord-36bfe76ba5b74f6e8e2fa388336f7549
Source dataset
uspto-grants-2016_02
Patent number
US09260429B2

Reaction notes

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