Reductive aminopropylation of ketene silyl (thio)acetals leading to the synthesis of δ-amino esters
作者:Isao Mizota、Shun Agatani、Iwao Hachiya、Makoto Shimizu
DOI:10.1016/j.tetlet.2011.08.054
日期:2011.10
In the presence of silica gel or titanium tetrachloride, ketene silyl acetals or ketene silyl thioacetals underwent 1,4-addition with α,β unsaturated aldimines which possess a large triphenylmethyl group at the imino nitrogens followed by reduction with sodium cyanoborohydride to give aminopropylated products, δ-amino esters, in good yields.
在硅胶或四氯化钛存在下,对烯酮甲硅烷基乙缩醛或烯酮甲硅烷基硫缩醛进行1,4-加成,在亚氨基氮上具有大三苯甲基的α,β不饱和醛亚胺,然后用氰基硼氢化钠还原,得到氨基丙基化的产物, δ-氨基酯,收率高。