作者:Elise Romain、Carolin Fopp、Fabrice Chemla、Franck Ferreira、Olivier Jackowski、Martin Oestreich、Alejandro Perez-Luna
DOI:10.1002/anie.201407002
日期:2014.10.13
The silylzincation of terminal ynamides is achieved through a radical‐chain process involving (Me3Si)3SiH and R2Zn. A potentially competing polar mechanism is excluded on the basis of diagnostic control experiments. The unique feature of this addition across the CC bond is its trans selectivity. One‐pot electrophilic substitution of the CZn bond by CuI‐mediated CC bond formation and subsequent manipulation
通过涉及(Me 3 Si)3 SiH和R 2 Zn的自由基链过程可实现末端乙酰胺的甲硅烷基锌化。在诊断控制实验的基础上,排除了潜在竞争的极性机制。跨CC键的这种添加的独特特征是其反式选择性。通过Cu I介导的CC键的形成对CZn键进行一锅亲电取代,以及随后对CSi键的操作,为Z-α,β-二取代的酰胺提供了模块化的途径。