Expanding the Scope of Arylsulfonylacetylenes as Alkynylating Reagents and Mechanistic Insights in the Formation of Csp<sup>2</sup>Csp and Csp<sup>3</sup>Csp Bonds from Organolithiums
作者:José Luis García Ruano、José Alemán、Leyre Marzo、Cuauhtémoc Alvarado、Mariola Tortosa、Sergio Díaz‐Tendero、Alberto Fraile
DOI:10.1002/chem.201200939
日期:2012.7.2
We describe the unexpected behavior of the arylsulfonylacetylenes, which suffer an “anti‐Michael” addition of organolithiums producing their alkynylation under very mild conditions. The broad scope, excellent yields, and simplicity of the experimental procedure are the main features of this methodology. A rational explanation of all these results can be achieved by theoretical calculations, which suggest
我们描述了芳基磺酰基乙炔的出乎意料的行为,芳基磺酰基乙炔在非常温和的条件下会遭受“反迈克尔”加成的有机锂的作用,从而产生炔基化反应。这种方法的主要特点是范围广,产率高,实验步骤简单。所有这些结果的合理解释可以通过理论计算来实现,这表明有机锂与亲电试剂的缔合是其分子内攻击的前一步,并且是观察到的对取代的磺酰基乙炔的意外“反迈克尔”反应的原因。