Highly Regio- and Enantioselective Nitroso Diels−Alder Reaction of 1,3-Diene-1-carbamates Catalyzed by Chiral <i>N,N′</i>
-Dioxide/Copper(II) Complex
作者:Yan Lu、Yuhang Zhou、Jingchuan Zhang、Lili Lin、Xiaohua Liu、Xiaoming Feng
DOI:10.1002/adsc.201701155
日期:2018.1.4
A chiral N,N′‐dioxide/Copper(II) complex‐catalyzed highly regio‐ and enantioselective nitroso Diels−Alder (NDA) reaction of 2‐nitrosopyridines with 1,3‐diene‐1‐carbamates was described. A series of 3,6‐dihydro‐1,2‐oxazines were obtained in good to excellent yields and ee values. On the basis of the control experiments, ESI‐MS analysis and the absolute configuration of the product, a possible transition
描述了一种手性N,N'-二氧化物/铜(II)络合物催化2-亚硝基吡啶与1,3-二烯-1-氨基甲酸酯的高度区域和对映选择性亚硝基Diels-Alder(NDA)反应。获得了一系列3,6-二氢-1,2-恶嗪,收率和ee值都非常好。在控制实验,ESI-MS分析和产品的绝对配置的基础上,提出了可能的过渡状态模型来解释立体控制。