Stereoselective Conjugate Addition-Enamination of α-Linear N-tert-Butanesulfinyl Ketimines with Nitroolefins
作者:Chong-Dao Lu、Nuermaimaiti Yisimayili、Li-Feng Chu、Jie Feng
DOI:10.1055/s-0040-1719925
日期:2022.10
generated by deprotonating α-linear N-tert-butanesulfinyl ketimines, reacted with nitroalkenes via stereoselective conjugate addition to give Michael adducts with opposite stereochemistry to that obtained using α-branched sulfinylketimines. In the presence of excess base (2.5 equiv t-BuOK), the adducts derived from α-linear ketimines were further stereoselectively deprotonated to afford the corresponding
N-亚磺酰基金属烯胺是通过对 α-线性N-叔丁亚磺酰基酮亚胺进行去质子化生成的,通过立体选择性共轭加成与硝基烯烃反应,得到具有与使用 α-支链亚磺酰基酮亚胺相反的立体化学的迈克尔加合物。在过量碱(2.5 equiv t -BuOK)存在下,衍生自 α-线性酮亚胺的加合物进一步立体选择性去质子化,以良好的收率和良好的立体选择性提供相应的动力学有利的N-亚磺酰基 ( Z )-烯胺衍生物。提出了一种反应模型来合理化观察到的立体化学。