Potassium Carbonate → 7,8-bis(4-cyanophenyl)-2-isobutyl-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one

HRID 2101356Notes

Reaction equation

Br[C:2]1[CH:7]=[CH:6][N:5]2[C:8](=[O:15])[N:9]([CH2:11][CH:12]([CH3:14])[CH3:13])[N:10]=[C:4]2[C:3]=1I.[C:17]([C:19]1[CH:24]=[CH:23][C:22](B(O)O)=[CH:21][CH:20]=1)#[N:18].C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:17]([C:19]1[CH:24]=[CH:23][C:22]([C:2]2[CH:7]=[CH:6][N:5]3[C:8](=[O:15])[N:9]([CH2:11][CH:12]([CH3:14])[CH3:13])[N:10]=[C:4]3[C:3]=2[C:22]2[CH:23]=[CH:24][C:19]([C:17]#[N:18])=[CH:20][CH:21]=2)=[CH:21][CH:20]=1)#[N:18]

Participants

Conditions

Temperature: 200 °C

Procedure

To a stirring, degassed mixture of 7-bromo-8-iodo-2-isobutyl-[1,2,4]triazolo[4,3-a]pyridin-3(2H)-one (50 mg, 0.13 mmol), 4-cyanophenylboronic acid (40 mg, 0.28 mmol), and tetrakis(triphenylphosphine)palladium (7 mg, 0.006 mmol) in dioxane (1.0 mL) at 20° C. was added K2CO3 (40 mg, 0.25 mmol) in water (0.3 mL). The resulting reaction mixture was heated in a microwave reactor at 200° C. for 10 min under argon. Analysis by HPLC/MS indicated that starting material had been consumed. The reaction mixture was brought to room temperature and was concentrated under reduced pressure. The crude product was purified by reverse phase preparative HPLC (acetonitrile-water-TFA) to isolate the title compound (15 mg, 0.038 mmol) as a yellow solid. MS: [M+H]+=394.

Workup

customTo a stirring, degassed
customThe resulting reaction mixture
customhad been consumed
customwas brought to room temperature
concentrationwas concentrated under reduced pressure
customThe crude product was purified by reverse phase preparative HPLC (acetonitrile-water-TFA)

Sources & evidence

ORD record: ord-76f4792070e240598587097a8a89b687
Source dataset: uspto-grants-2009_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07572808B2

Reaction notes

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