2,6-Piperidinediones, I. Synthesis of the Racemates and the Enantiomers of 3,3-Disubstituted 2,6-Piperidinediones
作者:Joachim Knabe、Dirk Reischig
DOI:10.1002/ardp.19843170413
日期:——
The synthesis of the racemates and the enantiomers of the 3,3‐disubstituted 2,6‐piperidinediones 3a–3g is performed in three ways, depending on the C‐3 substituents. The 3‐cyclohexylpiperidinedione 3h is obtained as racemic and optically active compound by hydrogenation of the cyclohexenyl compound 3e with Pd/C. The N‐methylpiperidinediones 7a and 7b are obtained by methylation of 3a and 3b with CH2N2
根据 C-3 取代基的不同,3,3-二取代的 2,6-哌啶二酮 3a-3g 的外消旋体和对映体的合成以三种方式进行。3-环己基哌啶二酮 3h 是通过用 Pd/C 氢化环己烯基化合物 3e 得到的外消旋和旋光化合物。N-甲基哌啶二酮 7a 和 7b 是通过用 CH2N2 对 3a 和 3b 进行甲基化得到的。