A Flexible Strategy Based on a <i>C</i><sub>2</sub>-Symmetric Pool of Chiral Substrates: Concise Synthesis of (+)-Valienamine, Key Intermediate of (+)- Pancratistatin, and Conduramines A-1 and E
作者:Yuan-Kang Chang、Hong-Jay Lo、Tu-Hsin Yan
DOI:10.1021/ol9016194
日期:2009.10.1
A new strategy invoking a new application of the [3,3] sigmatropic rearrangement of allylic azides and the presence of a C2 symmetry element within a pool of chiral substrates was evolved. Not only does this simple flexible strategy provide a concise approach to (+)-valienamine, but it also can readily be adopted for the synthesis of conduramines A-1 and E and the enantiopure azido carbonate 4, a key
进化出了一种新策略,该策略调用了烯丙基叠氮化物的[3,3]σ重排的新应用以及手性底物池中C 2对称元素的存在。这种简单灵活的策略不仅为(+)-缬氨酸提供了一种简明的方法,而且还可以很容易地用于合成conduramines A-1和E和对映纯的叠氮基碳酸4,这是(+)-的关键中间体潘克拉斯汀。