作者:Yuanchao Li、Bing Zhou、Zhi Luo、Sui Lin
DOI:10.1055/s-0031-1290614
日期:2012.4
starting from Garner’s aldehyde in ten steps and 23% overall yield. A unique feature of the synthetic route is that an acyclic precursor was constructed, using diastereoselective antireductive coupling reaction of alkyne and Garner’s aldehyde as the key step, which was then cyclized in an intramolecular aldol reaction to form the valienamine skeleton. (+)-valienamine - Garner’s aldehyde - diastereoselective
从加纳醛开始,以十个步骤合成(+)-缬氨酸胺,总产率为23%。合成路线的独特之处在于,以炔烃和加纳醛的非对映选择性抗还原偶联反应为关键步骤,构建了无环前体,然后在分子内羟醛反应中环化形成缬氨酸胺骨架。 (+)-缬氨酸胺-加纳醛-非对映选择性-加氢锆-重金属化-分子内羟醛反应