α-羰基烯酮式环二硫代缩醛类化合物的制备

Preparation of α-Oxo Ketene Cyclic Dithioacetals

从具有α-亚甲基的酮出发,利用溶液稀释的方法,提高了用Dieter法合成α-羰基烯酮式环二硫代缩醛类化合物的产率,并用改进方法合成了4个该类化合物。

Three compounds of a-oxo ketene dithioacetals were prepared by Dieter' s method. When 1,2- and 1,3-diiodoalkane in the form of diluted solution were added into the reaction system , four analogues of a-oxo ketene cyclic dithioacetals were obtained in high yields by starting from appropriate a-methylene ketones.