Proline-catalyzed aldol reactions of acyl cyanides with acetone: an efficient and convenient synthesis of 1,3-diketones
作者:Zongxuan Shen、Bin Li、Lu Wang、Yawen Zhang
DOI:10.1016/j.tetlet.2005.10.036
日期:2005.12
The aldol-type addition of acetone towards (un)substituted benzoyl, heteroarylcarbonyl or α,β-unsaturated acyl cyanides was efficiently catalyzed by l-proline (30 mol %) to give 2-hydroxy-4-oxo-2-substituted pentanenitriles. Upon the treatment with sodium hydroxide, the adducts transformed to 1,3-diketones in good-to-excellent yield, furnishing an efficient and convenient method for the regioselective
丙酮对(未)取代的苯甲酰基,杂芳基羰基或α,β-不饱和酰基氰的醛醇型加成被1-脯氨酸(30mol%)有效地催化,得到2-羟基-4-氧代-2-取代的戊腈。用氢氧化钠处理后,加合物以良好至优异的产率转化为1,3-二酮,为1,3-二酮的区域选择性合成提供了一种有效而方便的方法。