Triethylamine → 4-oxo-8-pyridin-2-ylethynyl-4,5-dihydro-3H-pyrrolo[2,3-c]quinoline 1-ethyl carboxylate

HRID 1970048Notes

Reaction equation

C(N(CC)CC)C.I[C:9]1[CH:18]=[CH:17][C:16]2[NH:15][C:14](=[O:19])[C:13]3[NH:20][CH:21]=[CH:22][C:12]=3[C:11]=2[CH:10]=1.[CH2:23]([C:25]([O-:27])=[O:26])[CH3:24].[C:28]([C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][N:31]=1)#[CH:29]>O1CCOCC1.[Cu](I)I.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>[O:19]=[C:14]1[C:13]2[NH:20][CH:21]=[CH:22][C:12]=2[C:11]2[CH:10]=[C:9]([C:29]#[C:28][C:30]3[CH:35]=[CH:34][CH:33]=[CH:32][N:31]=3)[CH:18]=[CH:17][C:16]=2[NH:15]1.[CH2:23]([C:25]([O-:27])=[O:26])[CH3:24]

Participants

Conditions

Temperature: 100 °C

Procedure

20 mg (0.11 mmol) of copper iodide, 28 mg (0.27 mmol) of triethylamine and 14 mg (0.02 mmol) of dichlorobis(triphenylphosphine)-palladium (II) are added to a suspension of 80 mg (0.21 mmol) of 8-iodo-4-oxo-4,5-dihydro-3H-pyrrolo[2,3-c]quinoline-1-ethyl carboxylate in 2.4 ml of anhydrous dioxan, then this mixture is degassed under argon. After 15 minutes, 32 mg (0.31 mmol) of 2-ethynyl-pyridine are added, then the mixture is heated at 100° C. for 3 hours. The raw reaction product is then filtered on celite, the filtrate is evaporated to dryness and the residue is purified by chromatography on silica (eluent ethyl acetate) to give 34 mg (46%) of 4-oxo-8-pyridin-2-ylethynyl-4,5-dihydro-3H-pyrrolo[2,3-c]quinoline-1-ethyl carboxylate in the form of a brown solid.

Workup

customthis mixture is degassed under argon
customThe raw reaction product
filtrationis then filtered on celite
customthe filtrate is evaporated to dryness
customthe residue is purified by chromatography on silica (eluent ethyl acetate)

Sources & evidence

ORD record: ord-0bbfe3886f5b4b8fad682616a34abf52
Source dataset: uspto-grants-2013_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08426437B2

Reaction notes

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