HCID 23156952, compound → HCID 23156957, compound

HRID 2110107Notes

Reaction equation

Br[C:2]1[O:6][C:5]([C:7]2[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][CH:8]=2)=[CH:4][CH:3]=1>O1CCOCC1.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[O:6]1[C:5]([C:7]2[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][CH:8]=2)=[CH:4][CH:3]=[C:2]1[C:5]1[O:6][CH:2]=[CH:3][CH:4]=1

Participants

Conditions

Temperature: 105 °C

Procedure

A mixture of 2 (2.48 g, 10 mmol), 2-tributyltin furan (3.58 g, 10 mmol), and tetrakis(triphenylphosphine) palladium (200 mg) in dry dioxane (60 mL) was heated under nitrogen at reflux (100-110° C.) for 24 h. The solvent was evaporated under reduced pressure and the resulting solid was dissolved in ethyl acetate. This solution was passed through celite to remove Pd. The solution was evaporated, and the solid was collected via filtration and washed with hexanes to furnish compound 3 in 79.5% yield, mp 104-105° C. 1H NMR (CDCl3); δ 6.51 (dd, J=3.6 Hz, J=1.8 Hz, 1H), 6.68 (m, 2H), 6.87 (d, J=3.6 Hz, 1H), 7.46 (d, J=1.8 Hz, 1H), 7.66 (d, J=8.4 Hz, 2H), 7.77 (d, J=8.4 Hz, 2H). 13C NMR (CDCl3); δ 150.9, 147.5, 145.8, 142.4, 134.1, 132.5, 123.7, 118.9, 111.6, 110.1, 107.5, 106.3. EIMS (m/z, rel.int.); 235 (M+, 100), 206 (10), 178 (15). Calcd for C15H9NO2: C, 76.59; H, 3.86; N, 5.95. Found. C, 76.35; H, 3.88; N, 5.92.

Workup

temperaturewas heated under nitrogen
customThe solvent was evaporated under reduced pressure
dissolutionthe resulting solid was dissolved in ethyl acetate
customto remove Pd
customThe solution was evaporated
filtrationthe solid was collected via filtration
washwashed with hexanes

Sources & evidence

ORD record: ord-2fcd6310cbd94eacadbc155e3d3744ec
Source dataset: uspto-grants-2009_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07517893B2

Reaction notes

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