A catalyst generated in situ from PdCl2 (1 mole) and p-CH3C6H4SO2-Na·4H2O (5 mole) promotes the dimerization of butadiene with the incorporation of α-acylamino ketones (1a∼1h) to provide α-acylamino α-(2,7-octadienyl) ketones (2a∼2h) in good yields. This new type of C-C bond forming reaction is not effected by the catalyst of Pd(PPh3)4 except for one example (with 1e).
由PdCl 2(1摩尔)和p-CH 3 C 6 H 4 SO 2 -Na·4H 2 O(5摩尔)原位生成的催化剂通过引入α-酰基
氨基酮(1a〜1h)促进
丁二烯的二聚作用。 )以高收率提供α-酰基
氨基α-(2,7-
辛二烯基)酮(2a〜2h)。除了一个实例(具有1e)之外,这种新型的CC键形成反应不受Pd(PPh 3)4的催化剂的影响。