TMSCl as a Rate-Accelerating Additive in Acylations of Amines with 5-(<font>α</font>-Amino-<font>α</font>′-hydroxy)methylene Meldrum Acids
作者:Karolina Janikowska、Sławomir Makowiec
DOI:10.1080/00397911.2010.533805
日期:2012.4.1
hylene Meldrum acids. We placed special emphasis on the acylation reaction of secondary amines with 5-(α-amino-α′-hydroxy)methylene Meldrum acids, which, because of their basicity, caused problems concerning salt formation with a Meldrum acid derivative. We found that secondary amines, which react at the slowest rate and give a poor yield with 5-(α-amino-α′-hydroxy)methylene Meldrum's acid, react quickly
摘要 介绍了胺、醇和硫醇与 5-(α-氨基-α'-羟基) 亚甲基 Meldrum 酸的酰化反应。我们特别强调仲胺与 5-(α-氨基-α'-羟基) 亚甲基 Meldrum 酸的酰化反应,由于它们的碱性,导致与 Meldrum 酸衍生物形成盐的问题。我们发现仲胺与 5-(α-氨基-α'-羟基) 亚甲基 Meldrum 酸反应速度最慢且收率低,在 1 到 3 的情况下与相同的试剂反应迅速且收率高相当于 TMSCl。针对诸如反应温度、溶剂极性和环境酸度等因素优化了用这种 Meldrum 酸衍生物的酰化。我们已经制备了多种非对称丙二酸二酰胺、酯、和丙二酸的硫酯。图形概要