Synthesis of an Optically Active Al(salalen) Complex and Its Application to Catalytic Hydrophosphonylation of Aldehydes and Aldimines
作者:Bunnai Saito、Hiromichi Egami、Tsutomu Katsuki
DOI:10.1021/ja0651005
日期:2007.2.1
serve as an efficient catalyst for hydrophosphonylation of aldehydes and aldimines, giving the corresponding alpha-hydroxy and alpha-amino phosphonates with high enantioselectivity, respectively. The scope of the hydrophosphonylation was wide, and both aliphatic and aromatic aldehydes and aldimines were successfully used as substrates for the reaction. The potent catalysis of the complex is attributed to
以模块化合成方式新合成了光学活性铝(salalen)配合物2,发现它可作为醛和醛亚胺氢膦酰化的有效催化剂,分别得到相应的具有高对映选择性的α-羟基和α-氨基膦酸酯. 氢膦酰化的范围很广,脂肪族和芳香族醛和醛亚胺都成功地用作反应的底物。该复合物的强大催化作用归因于其独特的结构:它采用扭曲的三角双锥体构型,这使得 salalen 配体呈顺式-β 样结构,其中手性氨基位于靠近金属中心的位置。