作者:Anju Nalikezhathu、Valeriy Cherepakhin、Travis J. Williams
DOI:10.1021/acs.orglett.0c01485
日期:2020.7.2
catalyzed tandem alcohol amination/Pictet–Spengler reaction sequence to synthesize tetrahydro-β-carbolines from an alcohol and tryptamine. Our conditions use a Lewis acid cocatalyst, In(OTf)3, that is compatible with typically base catalyzed amination and an acid catalyzed Pictet–Spengler cyclization. This method proceeds well with benzylic alcohols, heterocyclic carbinols, and aliphatic alcohols. We also
我们报道了吡啶基膦钌(II)催化的串联醇胺化/ Pictet-Spengler反应序列,可从醇和色胺中合成四氢-β-咔啉。我们的条件使用路易斯酸助催化剂In(OTf)3,它通常与碱催化的胺化反应和酸催化的Pictet-Spengler环化反应兼容。该方法与苯甲醇,杂环甲醇和脂族醇配合得很好。我们还显示了如何将此反应与随后的环胺化反应结合起来,使四环生物碱(如甜菜碱)直接合成。