Synthesis of novel chiral lipophilic pyridyl-containing β-amino alcohol ligands and enantioselective hydrolysis of α-amino acid esters by chiral metallomicelles
Seven novel chiral lipophilic pyridyl-containing β-amino alcohol ligands have been synthesized by coupling of 6-alkoxymethyl-2-chloromethylpyridine 3 with the corresponding chiral β-amino alcohols or l-cysteine. Their metal ion complexes have been investigated as catalysts for the enantioselective hydrolysis of N-protected α-aminoacidesters in aqueous comicellar solution. The results indicate that
通过将6-烷氧基甲基-2-氯甲基吡啶3与相应的手性β-氨基醇或1-半胱氨酸偶联,已经合成了七个新颖的手性亲脂性吡啶基含β-氨基醇配体。已经研究了它们的金属离子配合物作为催化剂,用于在漫画溶液中对N-保护的α-氨基酸酯进行对映选择性水解。结果表明,底物与金属催化剂之间的疏水相互作用,配体的刚度,配体的羟基充当亲酰基化的酰基转移过程以及胶束微环境是影响活性和对映选择性的重要因素。大速率加速度(高达三个数量级)和中等对映选择性(高达7.81(k已经观察到采用4a -Cu 2+的R / k S))。