作者:Tobias Stopka、Meike Niggemann、Nuno Maulide
DOI:10.1002/anie.201705964
日期:2017.10.16
The selective, metal‐free generation of α‐carbonyl cations from simple internal alkynes was accomplished by the addition of a sulfoxide to a densely substituted vinyl cation. The high reactivity of the α‐carbonyl cations was found to efficiently induce hydrogen and even carbon shift reactions with unusual selecivities. Complex compounds with highly congested tertiary and all‐carbon‐substituted quartenary
通过在稠密取代的乙烯基阳离子中添加亚砜,可以从简单的内部炔烃中选择性无金属地生成α-羰基阳离子。发现α-羰基阳离子的高反应活性可以有效地引发氢,甚至以异常的选择性进行碳转移反应。因此,可以简单地从简单的前体中一步获得具有高度拥挤的叔碳原子和全碳取代的四碳原子中心的复杂化合物。机理分析强烈支持标题化合物的中间体,并为不同取代基的迁移能力提供了简单的预测方案。