Divergent Reactivity of Thioalkynes in Lewis Acid Catalyzed Annulations with Donor-Acceptor Cyclopropanes
作者:Sophie Racine、Bence Hegedüs、Rosario Scopelliti、Jérôme Waser
DOI:10.1002/chem.201602755
日期:2016.8.16
methods for the convergent synthesis of (poly)cyclic scaffolds are urgently needed in synthetic and medicinal chemistry. Herein, we describe new annulation reactions of thioalkynes with phthalimide‐substituted donor–acceptor cyclopropanes, which gave access to highly substituted cyclopentenes and polycyclic ring systems. With silyl‐thioalkynes, the Lewis acid catalyzed [3+2] annulation reaction with
在合成和药物化学中迫切需要有效的方法来收敛合成(多)环骨架。在本文中,我们描述了硫代炔烃与邻苯二甲酰亚胺取代的供体-受体环丙烷的新环化反应,该反应可以使用高度取代的环戊烯和多环系统。对于甲硅烷基硫代炔烃,路易斯酸与供体-受体环丙烷进行了[3 + 2]环化反应,得到了1-硫代-环戊烯-3-胺。另一方面,通过直接涉及邻苯二甲酰亚胺基团的反应途径,与烷基硫代炔烃形成了前所未有的多环化合物。两次转化均以高收率进行,并耐受多种官能团。