were shown to be stable unlike their counterpart the chloroacroleins and their efficacy as 1,3-dielectrophilic properties have now been examined successfully in this work. They are shown to react with ethyl thioglycolate in the presence of anhydrous potassium carbonate in boiling ethanol to yield the corresponding 5-substituted/4,5-annulated-2-carbethoxy thiophenes in 70–80% overall high yields.
已证明(甲
硫基)
丙烯醛1a - m是稳定的,不同于其对应的
氯丙烯醛,并且已成功地检测了它们作为1,3-二亲电子性质的功效。它们在无
水碳酸钾存在下于沸腾的
乙醇中与
硫代
乙醇酸乙酯反应,可产生相应的5-取代/ 4,5-环化-2-羰基乙氧基
噻吩,总产率为70-80%。