Novel Approach to 1,5-Benzodiazepine-2-ones Containing Peptoid Backbone via One-Pot Diketene-Based Ugi-4CR
作者:Nasrin Zohreh、Abdolali Alizadeh、Hamid Reza Bijanzadeh、Log-Guan Zhu
DOI:10.1021/cc100037v
日期:2010.7.12
An efficient and simple route for preparation of substituted 1,5-benzodiazepine-2-one containing peptoid backbone is presented. The classical Ugi reaction is considerably extended by application of o-phenylenediamine and diketene as amine and oxo component. 1,3-Dihydro-1,5-benzodiazepine-2-one is generated in situ from these two building blocks combined with isocyanide and aromatic or aliphatic carboxylic
提出了一种有效且简单的方法来制备含取代的1,5-苯并二氮杂-2-酮的类肽骨架。通过使用邻苯二胺和双烯酮作为胺和氧代组分,可大大扩展经典的Ugi反应。由这两个结构单元与异氰化物和芳香族或脂肪族羧酸结合就地生成1,3-二氢-1,5-苯并二氮杂-2-酮,从而以高收率组装了多官能化标题支架。反应在甲苯/ CH 2 Cl 2的混合物中进行在没有催化剂的回流条件下。在溶液相中可以看到构象异构现象,这是由于空间位阻取代导致酰胺和C-CO波段周围自由旋转受限。在单晶状态下,发现该产物具有由分子间氢键引起的二聚结构。