Chemoenzymatic Asymmetric Synthesis of Optically Active Pentane-1,5-diamine Fragments by Means of Lipase-Catalyzed Desymmetrization Transformations
作者:Nicolás Ríos-Lombardía、Eduardo Busto、Vicente Gotor-Fernández、Vicente Gotor
DOI:10.1021/jo2007972
日期:2011.7.15
Reaction parameters such as type and loading of enzyme, temperature, solvent, and acyl donor have been exhaustively analyzed, searching for optimal conditions for the production of interesting optically active nitrogenated compounds. Thus, acylation and alkoxycarbonylation processes have been compared in terms of conversion and enantiomeric excess values. The best results were found in the reaction
已经有效地合成了新颖的前手性戊烷-1,5-二胺家族,其稳定性明显高于相应的丙烷-1,3-二胺类似物。后来已使用洋葱假单胞菌(Pseudomonas cepacia)对二胺进行去对称脂肪酶是一种有效的生物催化剂,可对其氨基之一进行单-立体保护。已经详尽地分析了反应参数,例如酶的类型和负载,温度,溶剂和酰基供体,以寻找生产有趣的旋光氮化化合物的最佳条件。因此,已经根据转化率和对映体过量值比较了酰化和烷氧基羰基化过程。在前手性二胺与甲氧基乙酸乙酯作为酰基供体和1,4-二恶烷作为溶剂的反应中发现了最佳结果,生成的(S)-单酰胺的分离产率为33-59%,ee为54-99%,具体取决于芳族化合物模式替换。