Water → HCID 86638786, compound

Participants

Reaction Steps

(RS01039) Potassium) fluoride (260 mg, 4.5 mmol) was added to a solution of 2-dicyanomethylene-3-cyano-5,5-dimethyl-4-(4′-trimethylsilylethynylphenyl)-2,5-dihydrofuran (500 mg, 1.4 mmol) in degassed THF/methanol (1.5:1, 40 mL). The reaction mixture was stirred for 24 h at room temperature, poured into water, stirred for 1 hr, kept in the refrigerator overnight, filtered and air-dried. The product was recrystallized from dichloromethanel/1-propanol, Yield: 330 mg. (90%), mp: 225° C., 1H NMR (400 MHz, CDCl3) δ 7.72 (d, J=8.8 Hz, 2H), 7.67 (d, J=8.8 Hz, 2H), 3.36 (s, 1H), 1.81 (s, 6H). 13C NMR (100 MHz, CDCl3) 176.24, 174.31, 133.32, 128.00, 126.93, 110.98, 110.06, 109.97, 102.50, 99.08, 82.29, 81.71, 26.13. IR (neat, cm−1 2965, 2226, 1623, 1614, 1534.

Provenance & Evidence