Diasteroselective Synthesis of New Spiropiperidine Scaffolds from the CN(<i>R</i>,<i>S</i>) Building Block
作者:Emmanuel Roulland、Fabrice Cecchin、Henri-Philippe Husson
DOI:10.1021/jo050258d
日期:2005.5.1
A methodology allowing the construction of spiropiperidine scaffolds similar to those found in naturally occurring alkaloids has been developed. This approach begins with the well-established CN(R,S) strategy, the spiro-center being built by way of an intramolecular attack of a nitrile function by an organolithium species obtained by a halogen/lithium exchange reaction mediated by either t-BuLi or lithium naphthalenide.