1,10-Phenanthroline → 8-chloro-2-methyl-5-((6-methylpyridin-3-yl)ethynyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

HRID 1400630Notes

Reaction equation

[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[NH:7][C:6]3[CH2:11][CH2:12][N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1.N1C2C(=CC=C3C=2N=CC=C3)C=CC=1.C(=O)([O-])[O-].[K+].[K+].Br[C:37]#[C:38][C:39]1[CH:40]=[CH:41][C:42]([CH3:45])=[N:43][CH:44]=1>C1(C)C=CC=CC=1.S([O-])([O-])(=O)=O.[Cu+2]>[Cl:1][C:2]1[CH:10]=[CH:9][C:8]2[N:7]([C:37]#[C:38][C:39]3[CH:44]=[N:43][C:42]([CH3:45])=[CH:41][CH:40]=3)[C:6]3[CH2:11][CH2:12][N:13]([CH3:15])[CH2:14][C:5]=3[C:4]=2[CH:3]=1

Participants

Conditions

Temperature: 85 °C

Procedure

8-Chloro-2-methyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (56 mg, 0.255 mmol) was dissolved in toluene and copper sulfate (6.3 mg. 0.0255 mmol) was added, followed by 1,10-phenanthroline (9.18 mg, 0.051 mmol) and potassium carbonate (70.38 mg, 0.51 mmol). 5-(Bromoethynyl)-2-methylpyridine (50 mg, 0.255 mmol) dissolved in toluene was added and the mixture purged with nitrogen in it. The reaction mixture was heated at 85° C. overnight. The reaction was monitored by TLC and LCMS. Toluene was concentrated under vacuum and the residue washed with water. The crude product was purified by column chromatography using 0-3% MeOH:DCM as eluent, to give the product as a yellow solid. 1H NMR (CDCl3, freebase) δ (ppm): 8.65 (s, 1H), 7.70 (d, 1H), 7.48 (d, 1H), 7.38 (s, 1H), 7.25 (d, 1H), 7.16 (d, 1H), 3.60 (s, 2H), 2.96 (m, 2H), 2.80 (m, 2H), 2.60 (s, 3H), 2.56 (s, 3H).

Workup

additionwas added
customthe mixture purged with nitrogen in it
concentrationToluene was concentrated under vacuum
washthe residue washed with water
customThe crude product was purified by column chromatography

Sources & evidence

ORD record: ord-f51233a1f7664254aad05a487f73569f
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08906925B2

Reaction notes

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