Inexpensive multigram-scale synthesis of cyclic enamines and 3-N spirocyclopropyl systems
作者:Pratik Kumar、Omar Zainul、Scott T. Laughlin
DOI:10.1039/c7ob02659e
日期:——
Cyclic enamines are important synthons for many synthetic and pharmacological targets. Here, we report an inexpensive, catalyst-free, multigram-scale synthesis for cyclic enamines with exocyclic double bonds and four- to seven-membered rings. This strategy is more conducive to scale up, permissive of functionalization around the cyclic system, and less sensitive to the nature of the N-protecting group
环烯胺是许多合成和药理学目标的重要合成子。在这里,我们报道了一种廉价的,无催化剂的,具有外环双键和四至七元环的环状烯胺的多克级合成方法。与先前描述的用于环状烯胺合成的方法相比,该策略更有利于扩大规模,允许在环系统周围进行官能化,并且对N-保护基的性质较不敏感。此外,我们探索这些烯胺在合成高应变螺环3N-环丙基支架中的应用。