The reductive rearrangement of 2-ethoxy-5-(2-alkenyl)-2H-tetrahydropyrane systems, in the presence of AlBu13, was used as the key-step in the synthesis of Prelog-Djerassi related lactones.
在存在AlBu 1 3的情况下,将2-乙氧基-5-(2-烯基)-2H-
四氢吡喃系统的还原性重排用作合成Prelog-Djerassi相关内酯的关键步骤。