反应详情

The procedure of Example 1 was followed except that 2-acetyl-5-bromothiophene (Aldrich) was used in place of acetophenone to prepare the corresponding 2-(5-bromothiophene-2-carbonyl)acetonitrile (Steps A and B). 2-Butanone (Aldrich), 2-(5-bromothiophene-2-carbonyl)acetonitrile, morpholine, and sulfur were reacted according to the procedure of Step C, Example 1, to afford the desired compound. Yield: 51%; IR (KBr) cm−1: 3348, 1559, 1448, 1413, 1388, 1318, 1263, 974, 769; 1H NMR (CDCl3):δ2.16 (s, 6H), 5.90 (bs, 2H), 7.02 (d, J=4 Hz, 1H), 7.11 (d, 1H, J=4 Hz); orange solid, mp: 128-130° C. (petroleum ether).