β-thiolactams led essentially to stereoselective synthesis of the high energy electron-rich Z-alkenes. Extension of this methodology to the pyrolysis of 3-allyloxy derivatives gave a simple direct route to the synthetically important 4-pentenal. These pyrolytic transformations convert aldehydes to aryloxyalkenes (a protected homologation) and 4-pentenal (a C-1 allylation and homologation). The starting
β-内酰胺和β-
硫代内酰胺的热解基本上导致了高能富电子的Z-烯烃的立体选择性合成。将该方法扩展至3-烯丙氧基衍
生物的热解,给出了一条通往合成重要的
4-戊烯醛的简单直接途径。这些热解转化将醛转化为芳氧基烯烃(受保护的同系物)和
4-戊烯醛(C-1烯丙基化和同系物)。起始的3-芳氧基和3-烯丙氧基-β-内酰胺是通过标准的Staudinger
乙烯酮-
亚胺[2 + 2]环加成反应合成的。通过用Lawesson试剂对β-内酰胺进行
硫杂化,可以容易地以高收率获得相应的β-
硫内酰胺。