N-Fluorenyltryptamines as a Useful Platform for Catalytic Enantioselective Pictet–Spengler Reactions
作者:Alafate Adili、Aniket V. Sole、Daniel Seidel、Bishwaprava Das、Megan E. Matter
DOI:10.1055/a-1970-4452
日期:——
thiourea–carboxylic acid catalyst, N-9-fluorenyltryptamines undergo highly enantioselective Pictet–Spenglerreactions with a range of aldehydes. The reaction works particularly well with aromatic aldehydes, tolerating electronically diverse substituents in all ring positions. Electron-deficient tryptamines are viable substrates. Removal of the fluorenyl protecting group is readily accomplished without deterioration
在硫脲-羧酸催化剂存在下,N -9-芴基色胺与一系列醛发生高度对映选择性的 Pictet-Spengler 反应。该反应特别适用于芳香醛,在所有环位上都可以接受电子不同的取代基。缺电子色胺是可行的底物。去除芴基保护基团很容易完成,而不会使产物 ee 变差。