Synthesis of (
<i>Z</i>
)‐β‐(Carbonylamino)alkenylindium through Regioselective
<i>anti</i>
‐Carboindation of Ynamides and Its Transformation to Multisubstituted Enamides
作者:Kyoungmin Kang、Kosuke Sakamoto、Yoshihiro Nishimoto、Makoto Yasuda
DOI:10.1002/chem.201905175
日期:2020.4.16
an anti-addition, which was supported by DFT calculations. The scope of substrates included various ynamides and silylated nucleophiles, such as silyl ketene acetals and silyl ketene imines. The transformation of synthesized alkenylindiums by iodination, radical coupling, and Pd-catalyzed cross-coupling successfully afforded trisubstituted enamines with high regio- and stereoselectivities.
通过使用InBr3和甲硅烷基化的亲核试剂,对酰胺类进行了区域选择性的抗碳氢化作用,从而合成了(Z)-β-(羰基氨基)烯基铟。烯基铟的X射线晶体分析表明该反应以抗加成方式进行。与报道的通过使用有机金属进行的酰胺酰胺的碳-羰基金属化相反,InBr3和甲硅烷基化的亲核试剂与酰胺的协同作用实现了抗加成反应,这得到了DFT计算的支持。底物的范围包括各种乙酰胺和甲硅烷基化的亲核试剂,例如甲硅烷基烯酮缩醛和甲硅烷基烯酮亚胺。通过碘化,自由基偶联和Pd催化的交叉偶联对合成的烯基铟进行的转化成功地提供了具有高区域选择性和立体选择性的三取代烯胺。