A facile five step synthesis ofN-benzyl-2,3-substituted morpholines (i-iii) was performed. The key steps were microwave assisted Friedel-crafts acylation and diol cyclization carried out via an ultra sonication of Mitsunobu reaction using DEAD (diethylazodicarboxylate), TPP in THF for 1 h. The morpholine products were generated as diasteriomers (iiandiii) which has been separated by the column chromatography to good yield. The structure of compounds (i-iii) has been characterized by the spectral and chemical studies.
进行了一种简单的五步合成N-苄基-2,3-取代吗啡啶(i-iii)。关键步骤是利用微波辅助的Friedel-crafts酰化和二醇环化,通过超声Mitsunobu反应(使用DEAD(二乙基叠氮二甲酸酯),TPP在THF中反应1小时)。吗啡啶产物生成为二对映异构体(ii和iii),通过色谱柱分离获得良好收率。这些化合物(i-iii)的结构已通过光谱和化学研究进行了表征。