作者:James C. Anderson、Eva Bouvier-Israel、Christopher D. Rundell、Xiangyu Zhang
DOI:10.1016/j.tet.2020.131821
日期:2021.1
A method for the synthesis of functionalized piperidines containing 3 contiguous stereocentres in the 2-,3- and 4- positions uses a diastereoselective nitro-Mannich to control stereochemistry. The nitro-Mannich reaction between a β-aryl/heteroaryl substituted nitroalkanes and glyoxylate imine provides β-nitro-amines with good selectivity (70:30 to >95:5) for the syn, anti-diastereoisomers. Reductive
合成在2-,3-和4-位含有3个连续立体中心的官能化哌啶的方法是使用非对映选择性硝基曼尼希来控制立体化学。一个之间的硝基-曼尼希反应β -芳基/杂芳基取代的硝基烷烃和乙醛酸亚胺提供具有良好的选择性β硝基胺(70:30至> 95:5)为顺式,反-diastereoisomers。纯化后,用BF 3 .OEt 2和Et 3 SiH进行的还原环化反应制得的十个具有不同4-芳基/杂芳基取代基的立体化学纯哌啶类化合物的收率为19-57%。