“…The title compound was isolated by silica gel column chromatography (petroleum ether) as a light yellow oil in 76% yield (134.4 mg). 1 H NMR (400 MHz, chloroform-d) δ 7.25 (d,J = 7.5 Hz,2H),7.07 (d,J = 7.7 Hz,2H),5.90 (s,1H),5.58 (s,1H), 2.45 (t, J = 7.6 Hz, 2H), 1.45 (t, J = 7.4 Hz, 2H), 1.17 (s, 4H), 0.73 (t, J = 5.8 Hz, 3H). 13 C{ 1 H} NMR (101 MHz,141.6,130.2,129.4,125.8,119.4,35.8,31.6,30.9,22.6,14.1.…”