Primary-tertiary diamine-catalyzed Michael addition of ketones to isatylidenemalononitrile derivatives
作者:Akshay Kumar、Swapandeep Singh Chimni
DOI:10.3762/bjoc.10.91
日期:——
Simple primary-tertiary diamines easily derived from natural primary amino acids were used to catalyze the Michael addition of ketones with isatylidenemalononitrile derivatives. Diamine 1a in combination with D-CSA as an additive provided Michael adducts in high yield (up to 94%) and excellent enantioselectivity (up to 99%). The catalyst 1a was successfully used to catalyze the three-component version
容易从天然伯氨基酸衍生的简单伯-叔二胺用于催化酮与异亚丙基丙二腈衍生物的迈克尔加成。二胺 1a 与作为添加剂的 D-CSA 结合提供了高产率(高达 94%)和出色的对映选择性(高达 99%)的迈克尔加合物。催化剂 1a 通过多米诺克诺韦纳格尔-迈克尔序列成功地用于催化三组分反应。通过以高度对映选择性的方式用硼氢化钠还原,迈克尔加合物 4a 转化为螺吲哚 6。