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 aminocompounds 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