Ring Expansion of 3-Oxetanone-Derived Spirocycles: Facile Synthesis of Saturated Nitrogen Heterocycles
作者:Stefan A. Ruider、Steffen Müller、Erick M. Carreira
DOI:10.1002/anie.201306563
日期:2013.11.4
all: 4,5‐Spirocycles derived from 3‐oxetanone and β‐heteroatom‐substituted amino compounds undergo a Lewis acid mediated reaction cascade to form saturated nitrogen heterocycles. The unique reactivity of 3‐oxetanone facilitates access to biologically important morpholines, piperazines, and thiomorpholines with an otherwise difficult‐to‐access substitution pattern from readily available starting materials
一环将它们全部带走:衍生自3-氧杂环丁酮和β-杂原子取代的氨基化合物的4,5-螺环经历路易斯酸介导的反应级联反应,形成饱和氮杂环。3-氧杂环丁酮具有独特的反应性,可方便地从重要的吗啉,哌嗪和硫代吗啉中获得,否则很难从容易获得的起始原料中获得取代模式。