The description provides processes for the regio and stereospecific synthesis of polyprenylatedquinone derivatives, such as Vitamin K1, K2 and Ubiquinone, exploiting dithioacetals, especially 1,3-dithiane, mediated Umpolung chemistry which works along a new concept “Inhibiting resonance delocalization (IRD)” to overcome isomerization generated due to delocalization of allyliccarbanion on the π-electron cloud of an allylic systems by the conventional synthesis.
该描述提供了多种聚
戊二烯醌衍
生物的区域和立体特异性合成过程,例如
维生素K1、K2和
辅酶Q,利用二
硫代
缩醛,特别是1,3-二
硫代
环戊烷,介导的Umpolung
化学,该
化学沿着一个新概念“抑制共振离域化(IRD)”工作,以克服由于烯丙基碳负离子在烯丙基体系的π电子云上的离域化而产生的异构化,这是传统合成无法解决的。