“…Concentration in vacuo yielded 7 as a colorless solid (12.0 g, 87%) which was used without further purification: mp 78-80 °C (lit. 50 79-81 °C); 1 H NMR (270 MHz, CDCl3) δ 7.33-7.42 (m, 10 H), 6.60 (d, J ) 2.2 Hz, 2H), 6.54 (t, J ) 2.2 Hz, 1H) , 5.02 (s, 4H), 4.61 (d, J ) 8.8 Hz, 2H), 1.64 (t, J ) 8.8 Hz, 1H).…”