Formal Total Synthesis of (+)-Salicylihalamides A and B: A Combined Chiral Pool and RCM Strategy
作者:KyoungLang Yang、Burchelle Blackman、Wibke Diederich、Patrick T. Flaherty、Craig J. Mossman、Subho Roy、Yu Mi Ahn、Gunda I. Georg
DOI:10.1021/jo0301550
日期:2003.12.1
The formal total synthesis of the (+)-salicylihalamides A and B is detailed, utilizing a chiral pool approach to generate the three stereogenic centers and a ring-closing metathesis (RCM) for the formation of the macrocyclic ring structure. Starting from a known glucose-derived alcohol, the formal total synthesis was achieved in an efficient 13-step protocol in 26% overall yield. It was found that
详细介绍了(+)-水杨酰卤酰胺A和B的正式总合成,利用手性库方法生成了三个立体异构中心和一个用于大环结构形成的闭环复分解(RCM)。从已知的葡萄糖衍生的醇开始,以有效的13步操作方案以26%的总收率实现了正式的全合成。发现在RCM步骤中,在远端酚基处的取代显着影响E-和Z-双键产物的比率。苯酚保护基的引入优先提供了E-异构体,并且还提高了RCM反应的速率。