Regioselective synthesis of substituted piperidine-2,4-diones and their derivatives via Dieckmann cyclisations
作者:Charles M. Marson、Kin Cheung Yau
DOI:10.1016/j.tet.2015.06.052
日期:2015.9
A flexible route to piperidine-2,4-diones variously substituted at the 6-, 5,6- and 2,6-positions, both with and without 1-substitution, is described; no N-protective group is required. A related regioselective Dieckmann cyclisation is also described that uses Davies' α-methylbenzylamine auxiliary and affords 6-substituted piperidine-2,4-diones enantioselectively.
描述了一种柔性路线,该路线可得到在6-,5,6-和2,6-位被1和2取代的哌啶-2,4-二酮,无论有无取代。不需要氮保护基。还描述了相关的区域选择性Dieckmann环化反应,该环化反应使用戴维斯的α-甲基苄胺助剂,并选择性地提供6-取代的哌啶-2,4-二酮。