An efficient and selective access to 1-substituted and 3-substituted derivatives of luotonin A
作者:Norbert Haider、Ge Meng、Sabine Roger、Sigrid Wank
DOI:10.1016/j.tet.2013.06.040
日期:2013.8
cycloaddition reaction of an arylpropargyl unit with a carbonitrile as the key step. These educts are conveniently accessible in two steps from a known precursor. The newly developed route is orthogonal to a previously used cycloaddition approach, which gave access to 2- or 4-substituted luotonin A derivatives.
描述了将取代基选择性引入抗肿瘤生物碱,褪黑素A的位置1或位置3的方法。该方案涉及芳基炔丙基单元与腈的碱催化的分子内[4 + 2]环加成反应,这是关键步骤。这些离析物可通过两个步骤方便地从已知的前体中获得。新开发的路线与以前使用的环加成方法正交,该方法可使用2-或4-取代的褪黑素A衍生物。