were obtained as essentially pure E-isomers. Cyclization of the E-isomers of the products derived from the dienyl sulfone 3 and the dienoate ester 6 occurred via intramolecular conjugate addition under base-catalyzed conditions to afford functionalized piperidines 5 and 16, respectively. The aza-Morita−Baylis−Hillman reaction and subsequent cyclization of the imine 2a with 3 were also carried out as
                                    发现在存在3-羟基喹核苷(HQD)的情况下,醛
亚胺2与几种活化的共轭二烯的aza-Morita-Baylis-Hillman反应在
DMF中顺利进行。
亚胺2与1-(对
甲苯磺酰基)-
1,3-丁二烯(3),
2,4-戊二烯酸甲酯(6),六-3,5-二烯-2-酮(7)和1-苯基
戊酸酯反应-2,4-二烯-1-酮(8),得到加合物4,13,14,和15,分别。同时产品4,13,和15分别形成为ë,ž得到的混合物,加合物14为基本纯的E-异构体。所述的环化Ë从二烯基砜衍生产品的异构体3和二烯酸酯酯6通过碱催化条件下,得到官能化的
哌啶下分子内共轭加成发生5和16,分别。一锅反应也进行了aza-Morita-Baylis-Hillman反应以及随后的
亚胺2a与3的环化反应,同时将反应混合物在300 nm处进行辐照,以实现未反应Z的光异构化-相应的4与-反应性更高的E-异构体的-加合物。