been prepared. By use of so-called ion-pair extraction technique a general method has been found for the preparation of β-hydroxydithiocinnamic esters in high yields. From these esters both symmetrical and unsymmetrical ketene mercaptals have been synthesized, and in some cases thio-Claisen rearrangement and subsequent ring-closure reactions have been observed.
已经制备了许多取代的β-羟基二
硫代
肉桂酸。通过使用所谓的离子对提取技术,已经发现了以高收率制备β-羟基二
硫代
肉桂酸酯的通用方法。由这些酯合成了对称和不对称的烯酮
硫醇,并且在某些情况下,已经观察到
硫代-克莱森重排和随后的闭环反应。