α-alkylation of α-amino esters by using a pyridoxal model compound having a Li+-ionophore character
作者:Kazuyuki Miyashita、Hideto Miyabe、Chiaki Kurozumi、Kuninori Tai、Takeshi Imanishi
DOI:10.1016/0040-4020(96)00704-1
日期:1996.9
Synthesis of α,α-dialkyl-α-amino esters by α-alkylation of aldimines prepared from a novel pyridoxal model compound was studied. The α-alkylation of the aldimines having an ethoxy-ethoxy group at C-3 proceeded most rapidly when LiOH was employed as a base and gave α,α-dialkyl-α-amino esters after acidic hydrolysis. The chelated structure composed of the aldimine and Li+ was also revealed by 1H-NMR analysis
研究了由新型吡ido醛模型化合物制得的亚胺的α-烷基化反应,合成α,α-二烷基-α-氨基酯。当使用LiOH作为碱并在酸性水解后得到α,α-二烷基-α-氨基酯时,在C-3处具有乙氧基-乙氧基的醛亚胺的α-烷基化进行得最快。通过1 H-NMR分析还揭示了由醛亚胺和Li +组成的螯合结构。