1,10-Phenanthroline → 5-((4-fluorophenyl)ethynyl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

HRID 1400624Notes

Reaction equation

[CH3:1][N:2]1[CH2:15][CH2:14][C:5]2[NH:6][C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]=2[CH2:3]1.N1C2C(=CC=C3C=2N=CC=C3)C=CC=1.Br[C:31]#[C:32][C:33]1[CH:38]=[CH:37][C:36]([F:39])=[CH:35][CH:34]=1>C1(C)C=CC=CC=1.S([O-])([O-])(=O)=O.[Cu+2]>[F:39][C:36]1[CH:37]=[CH:38][C:33]([C:32]#[C:31][N:6]2[C:7]3[CH:8]=[CH:9][C:10]([CH3:13])=[CH:11][C:12]=3[C:4]3[CH2:3][N:2]([CH3:1])[CH2:15][CH2:14][C:5]2=3)=[CH:34][CH:35]=1

Participants

Conditions

Temperature: 82.5 °C

Procedure

2,8-Dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (200 mg, 1.00 mmol) was dissolved in toluene (5 mL). The mixture was stirred for 10 min, and copper sulfate (24.9 mg, 0.01 mmol) and 1,10-phenanthroline (36 mg, 0.2 mmol) were added, and the mixture further stirred for min. To this was added 1-(bromoethynyl)-4-fluorobenzene compound (220 mg, 1.1 mmol) dissolved in toluene and the mixture purged with nitrogen. The reaction mixture was heated at 80-85° C. overnight. The progress of reaction was monitored by TLC and LCMS. The toluene was evaporated under reduced pressure and the crude product purified by column chromatography using silica (100-200 mesh) and 0-50% Ethylacetate:hexane as eluent. 1H NMR (DMSO, oxalate salt) δ (ppm): 7.70 (m, 2H), 7.55 (d, 1H), 7.30 (m, 3H), 7.20 (d, 1H), 4.30 (m, 2H), 3.16 (m, 4H), 2.90 (s, 3H), 2.40 (s, 3H).

Workup

stirringthe mixture further stirred for min
customthe mixture purged with nitrogen
customThe progress of reaction
customThe toluene was evaporated under reduced pressure
customthe crude product purified by column chromatography

Sources & evidence

ORD record: ord-eee49fcc96bf4d29818fc8f53e719d66
Source dataset: uspto-grants-2014_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08906925B2

Reaction notes

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