Potassium Phosphate, Tribasic → (E)-8-chloro-2,3-dimethyl-5-(2-(pyridin-4-yl)prop-1-enyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

HRID 1400482Notes

Reaction equation

HRID 1400482 reaction equation
[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[NH:7][C:6]3[CH2:11][CH:12]([CH3:16])[N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].Br[CH:26]=[C:27]([C:29]1[CH:34]=[CH:33][N:32]=[CH:31][CH:30]=1)[CH3:28].N1CCC[C@H]1C(O)=O>CN(C=O)C.[Cu]I.O>[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[N:7](/[CH:26]=[C:27](/[C:29]3[CH:34]=[CH:33][N:32]=[CH:31][CH:30]=3)\[CH3:28])[C:6]3[CH2:11][CH:12]([CH3:16])[N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1

Participants

8

Reactant 4

HCID 62657Potassium Phosphate, TribasicHCID 145742L-ProlineHCID 673096348-Chloro-2,3-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indoleHCID 86642478(E)-4-(1-bromoprop-1-en-2-yl)pyridine

Product 1

HCID 59454990(E)-8-chloro-2,3-dimethyl-5-(2-(pyridin-4-yl)prop-1-enyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Conditions

Temperature
140 °C

Procedure

8-Chloro-2,3-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (117 mg, 0.5 mmol) and potassium phosphate (212 mg, 1 mmol) were mixed in DMF and the suspension was purged with nitrogen. The suspension was heated at 140° C. for 10 min. In a separate round bottomed flask, 4-(1-bromoprop-1-en-2-yl)pyridine (107.83 mg, 0.55 mmol), L-proline (11.5 mg, 0.1 mmol) and Copper (I) iodide (9.5 mg, 0.05 mmol) were mixed in DMF, the suspension was purged with nitrogen, and heated at 90° C. for 5 min. at which point it became a clear solution. The contents in the two reaction flasks were mixed and the reaction mixture was heated overnight at 90° C. The contents were cooled to RT and poured into water. The precipitate obtained was filtered, dried and purified by silica gel chromatography (100-200 mesh, neutralized with aqueous ammonia) eluting with 0-10% MeOH-DCM as eluent. Compound was further purified by HPLC. 1H NMR (CD3OD, freebase) δ (ppm): 8.60 (d, 2H), 7.70 (d, 2H), 7.45 (s, 1H), 7.30 (s, 1H), 7.10 (s, 2H), 4.05 (d, 1H), 3.80 (d, 1H), 3.10 (m, 1H), 2.95 (m, 1H), 2.65 (m, 1H), 2.60 (s, 3H), 2.0 (s, 3H), 1.30 (d, 3H).

Workup

  1. customthe suspension was purged with nitrogen
  2. customthe suspension was purged with nitrogen
  3. temperatureheated at 90° C. for 5 min. at which point it
  4. customThe contents in the two reaction flasks
  5. additionwere mixed
  6. temperaturethe reaction mixture was heated overnight at 90° C
  7. temperatureThe contents were cooled to RT
  8. customThe precipitate obtained
  9. filtrationwas filtered
  10. customdried
  11. custompurified by silica gel chromatography (100-200 mesh, neutralized with aqueous ammonia)
  12. washeluting with 0-10% MeOH-DCM as eluent
  13. customCompound was further purified by HPLC

Sources & evidence

ORD record
ord-0e6ca95f87b54ab097e6d0797b7c0d76
Source dataset
uspto-grants-2014_12
Patent number
US08906925B2

Reaction notes

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