Tetrahydrofuran → HCID 66936733, compound

HRID 1943740Notes

Reaction equation

O1CCCC1.Br[C:7]1[CH:16]=[N:15][C:10]2[O:11][CH2:12][CH2:13][NH:14][C:9]=2[CH:8]=1.CC1(C)C(C)(C)OB([C:25]2[CH:33]=[CH:32][CH:31]=[C:30]3[C:26]=2[CH:27]=[CH:28][NH:29]3)O1.C(=O)([O-])[O-].[K+].[K+]>O>[NH:29]1[C:30]2[C:26](=[C:25]([C:7]3[CH:16]=[N:15][C:10]4[O:11][CH2:12][CH2:13][NH:14][C:9]=4[CH:8]=3)[CH:33]=[CH:32][CH:31]=2)[CH:27]=[CH:28]1

Participants

Conditions

Temperature: 80 °C

Procedure

To 3 ml of tetrahydrofuran (THF)/0.5 ml of distilled water, 7-bromo-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazine (80.0 mg, 0.37 mmol), 4-(4,4,5,5,-tetramethyl-[1,3,2]dioxaborolane-2-yl)-1H-indole (109 mg, 0.45 mmol), potassium carbonate (103 mg, 0.74 mmol) and tetrakis triphenylphosphine palladium (172 mg, 0.15 mmol) were added and stirred at 80° C. for 4 hours. After completion of the reaction, the mixture was extracted with ethyl acetate, and the combined organic layer was dried over anhydrous sodium sulfate (Na2SO4), filtered and evaporated under reduced pressure. The residue was purified by column chromatography on amine silica eluting with a solvent of dichloromethane:methanol=40:1. The fractions containing the product were collected and evaporated to obtain 7-(1H-indol-4-yl)-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazine as white solid (130 mg).

Workup

customAfter completion of the reaction
extractionthe mixture was extracted with ethyl acetate
dry with materialthe combined organic layer was dried over anhydrous sodium sulfate (Na2SO4)
filtrationfiltered
customevaporated under reduced pressure
customThe residue was purified by column chromatography on amine silica eluting with a solvent of dichloromethane
additionThe fractions containing the product
customwere collected
customevaporated

Sources & evidence

ORD record: ord-05a591a6f3ba4285915111af68f57a83
Source dataset: uspto-grants-2013_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08394792B2

Reaction notes

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