Two-Dimensional NMR Analysis of Acetonide Derivatives in the Stereochemical Assignment of Polyol Chains: The Absolute Configurations of Dermostatins A and B
作者:Scott D. Rychnovsky、Timothy I. Richardson、Bruce N. Rogers
DOI:10.1021/jo970213f
日期:1997.5.1
assigning the configuration of 1,3-skipped polyol chains and illustrate the approach with the configurationalassignments of both dermostatins A and B. The method is designed around the (13)C acetonideanalysis, which allows one to reliably determine the relative stereochemistry of an isolated 1,3-diol and is extended using DQF-COSY, HMQC, and ROESY experiments that allow each acetonide of a polyacetonide
我们报告了一种分配1,3,3烷基多元醇链构型的新的集成策略,并说明了具有两种方法的真皮抑素A和B的构型分配方法。该方法是围绕(13)C丙酮化物分析设计的,该方法可以实现为了可靠地确定分离的1,3-二醇的相对立体化学,并使用DQF-COSY,HMQC和ROESY实验进行了扩展,这些实验允许将聚丙酮化物衍生物的每个丙酮化物明确地指定为syn或anti。使用这种策略,仅使用两种聚丙酮化物衍生物即可确定derostatin A C13-C32多元醇链的相对构型。derostatin A的绝对构型为15S,16S,17R,19R,21R,23S,25S,27R,29R,31R,34S,35S,dermostatin B的构型为15S,16S,17R,19R,21R,23S, 25S,27R,29R,31R,34S,35S,36S。