The Preparation of (−)-Grandisine B from (+)-Grandisine D; A Biomimetic Total Synthesis or Formation of an Isolation Artefact?
作者:James D. Cuthbertson、Andrew A. Godfrey、Richard J. K. Taylor
DOI:10.1021/ol2014939
日期:2011.8.5
has been developed to prepare enantiopure indolizidine building blocks from l-proline and then applied to prepare the Elaeocarpus-derived alkaloids grandisine B and grandisine D in an efficient manner. However, evidence is presented which indicates that grandisine B does not occur naturally but is formed by reaction of grandisine D with ammonia during the extraction/purification process.
一种有效的新炔缩醛环化方法已经被开发,以制备对映体纯吲哚里建立从块升-脯氨酸,然后施加到制备杜英衍生生物碱grandisine B和grandisine d以有效的方式。但是,提供的证据表明,金刚烷胺B不是天然存在的,而是由金刚烷胺D在萃取/纯化过程中与氨反应形成的。