2,5-Dihydrofuran → N-(4-(3-(2,3-Dihydrofuran-2-YL)pyridin-2-yloxy)phenyl)pyridin-2-amine

HRID 473661Notes

Reaction equation

Cl.Br[C:3]1[C:4]([O:9][C:10]2[CH:15]=[CH:14][C:13]([NH:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=3)=[CH:12][CH:11]=2)=[N:5][CH:6]=[CH:7][CH:8]=1.C1(N(C)C2CCCCC2)CCCCC1.[O:37]1[CH2:41][CH:40]=[CH:39][CH2:38]1>[Pd].C(P(C(C)(C)C)C(C)(C)C)(C)(C)C.C(P(C(C)(C)C)C(C)(C)C)(C)(C)C.O1CCOCC1>[O:37]1[CH:38]=[CH:39][CH2:40][CH:41]1[C:3]1[C:4]([O:9][C:10]2[CH:15]=[CH:14][C:13]([NH:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=3)=[CH:12][CH:11]=2)=[N:5][CH:6]=[CH:7][CH:8]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a 25 mL microwave vial was added Bis(tri-tert-butylphosphine) palladium (0) (121 mg, 0.238 mmol) and N-(4-(3-bromopyridin-2-yloxy)phenyl)pyridin-2-amine hydrochloride (900 mg, 2.377 mmol) before sealing and evacuating and backfilling with nitrogen (2×). After addition of dioxane (11.900 ml), N-cyclohexyl-N-methylcyclohexanamine (1.008 ml, 4.75 mmol), and 2,5-dihydrofuran (0.701 ml, 9.51 mmol), the black suspension was heated to 80° C. for 5 h. The reaction mixture was cooled to room temperature, transferred to a 100 mL round bottom flask, and concentrated under reduced pressure. The material was taken up in DCM and adsorbed onto silica before purifying by flash chromatography (0 to 75% ethyl acetate/hexanes), affording a mixture of 2- and 3-dihydrofuranyl products that was used in subsequent reactions.

Workup

customevacuating
temperatureThe reaction mixture was cooled to room temperature
customtransferred to a 100 mL round bottom flask
concentrationconcentrated under reduced pressure
custombefore purifying by flash chromatography (0 to 75% ethyl acetate/hexanes)
customaffording

Sources & evidence

ORD record: ord-705209111c234a03a4925a7d528962ba
Source dataset: uspto-grants-2014_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08637500B2

Reaction notes

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