Enantioselective Aza-Henry Reaction of Seven-Membered Cyclic Imines, Dibenzo[<i>b</i>,<i>f</i>][1,4]oxazepines, by Bifunctional Organocatalysis
作者:You-Dong Shao、Dan-Dan Han、Xin-Yuan Yang、Di-Di Zhou、Tao Wang、Dao-Juan Cheng
DOI:10.1002/ejoc.201900151
日期:2019.3.7
The first organocatalytic asymmetric aza‐Henry reaction of unactivated seven‐membered cyclic imines, dibenzo[b,f][1,4]oxazepines, with nitroalkanes has been achieved. In the presence of 10 mol‐% quinine‐derived thiourea, a range of chiral 11‐(nitromethyl)‐10,11‐dihydrodibenzo[b,f][1,4]oxazepine derivatives were produced in good to excellent yields (up to 97 %) and enantioselectivities (up to 98 % ee)
已实现了未活化的七元环亚胺,二苯并[ b,f ] [1,4]氧氮杂与硝基烷烃的第一个有机催化不对称氮杂-亨利反应。在存在10 mol%奎宁衍生的硫脲的情况下,生产了一系列手性良好的11-(硝基甲基)-10,11-二氢二苯并[ b,f ] [1,4]氧杂pine庚因衍生物(最高97%)和对映选择性(最高98%ee)。