New insights into synthesis and oligomerization of ε-lactams derived from the terpenoid ketone (−)-menthone
作者:Malte Winnacker、Andreas Tischner、Michael Neumeier、Bernhard Rieger
DOI:10.1039/c5ra15656d
日期:——
which are derived from terpenoid ketone (−)-menthone in two steps, are oligomerized in an easy acid-induced procedure to obtain oligoamides that contain alkyl groups and stereocenters; for this, a nucleophilic oligomerization via a non-ionic propagating site (neutral conditions) and a polycondensation are also possible. Furthermore, a regioselective synthesis is demonstrated where (−)-menthone is transformed
分两步衍生自萜类酮(-)-薄荷酮的两种区域异构内酰胺,通过简单的酸诱导方法进行低聚反应,得到含有烷基和立构中心的低酰胺。为此,经由非离子的传播位点(中性条件)的亲核低聚和缩聚也是可能的。此外,证明了区域选择性合成,其中通过贝克曼重排以一步步骤将(-)-薄荷酮转化为这些内酰胺之一,而无需使用试剂羟胺-O-磺酸(HOSA)分离任何肟中间体。这些简洁的低聚酰胺合成物为具有高度有趣结构的新型可持续长链聚酰胺铺平了道路。