Synthesis of Polyhydroxylated Quinolizidine and Indolizidine Scaffolds from Sugar-Derived Lactams via a One-Pot Reduction/Mannich/Michael Sequence
作者:Piotr Szcześniak、Sebastian Stecko、Elżbieta Maziarz、Olga Staszewska-Krajewska、Bartłomiej Furman
DOI:10.1021/jo502146z
日期:2014.11.7
A direct approach to the synthesis of indolizidine and quinolizidine scaffolds of iminosugars is described. The presented strategy is based on a one-pot sugar lactam reduction with Schwartz’s reagent followed by a diastereoselective Mannich/Michael tandem reaction of the resulting sugar imine with Danishefsky’s diene. The stereochemical course of the investigated reaction has been explained in detail
描述了一种直接合成亚氨基糖的吲哚并立定和喹喔嗪骨架的方法。提出的策略是基于先用Schwartz试剂还原一锅糖内酰胺,然后再将得到的糖亚胺与Danishefsky的二烯进行非对映选择性的Mannich / Michael串联反应。已详细解释了所研究反应的立体化学过程。所获得的双环产物是用于合成各种天然存在的多羟基化生物碱及其衍生物的有吸引力的结构单元。