Synthesis of novel bis(β-aminocarbonyl) compounds and some β-aminocarbonyls by catalyst-free multicomponent Mannich reactions
作者:H. Eshghi、M. Rahimizadeh、F. Eshkil、M. Hosseini、M. Bakavoli、M. Sanei-Ahmadabad
DOI:10.1007/s13738-013-0340-3
日期:2014.6
AbstractA highly diastereoselective catalyst-free multicomponent Mannich reaction between cyclohexanone, aromatic aldehydes and amines in cyclohexane is described. The double Mannich reaction of diamines and two equivalents of aldehydes and cyclohexanone gave the novel bis(β-aminocarbonyl) compounds. Reactions proceeded in good to high yields with an excellent diastereoselectivity. The best selectivity
摘要描述了环己酮,芳族醛和胺在环己烷中的高度非对映选择性的无催化剂多组分曼尼希反应。二胺和两个当量的醛和环己酮的双重曼尼希反应产生了新型的双(β-氨基羰基)化合物。反应以良好的非对映选择性高收率地进行。当醛上的供电子基团和吸电子基团较弱时,可获得最佳的选择性。当醛上存在强吸电子基团和/或释放电子基团时,曼尼希产物的形成速率降低。在这些情况下,仅以中等至高收率获得相应的亚胺。在该反应中,芳族二胺比脂族二胺更合适。通常, 图形概要 。