The phthalimide scaffold is recognized from bioactive compounds and marketed drugs, but can also be used as fluorescent probes by introducing a 4-amino substituent. Unfortunately, a general and convenient method to synthesize various 4-amino substituted phthalimides has been lacking. To overcome this, an atom efficient one-step synthesis of 4-amino substituted phthalimides in good to excellent yields that tolerate a wide range of substituents has been developed. Several of the generated compounds display interesting solvatochromic properties with high quantum yield of fluorescence in non-polar solvents that are significantly reduced in polar protic solvents. Many of these compounds displayed non-toxic properties and non-detectable unspecific binding and can thus potentially be linked to a substrate and used as fluorescent probes. Furthermore, bioactive and fluorescent 4-amino substituted phthalimides with IC50-values in the low micromolar range in cell-based assays have been identified and could be used to study uptake and distribution. The developed convenient synthetic method is thus valuable not only to construct fluorescent probes and fluorescent bioactive compounds to gain information about target binding, but also from a structure activity point of view in the various areas where the phthalimides have displayed activity.
                                    邻苯二甲
酰亚胺支架可从
生物活性化合物和上市药物中识别,但也可通过引入 4-
氨基取代基用作荧光探针。遗憾的是,合成各种 4-
氨基取代邻苯二甲
酰亚胺的通用便捷方法一直缺乏。为了克服这一问题,我们开发了一种原子高效的一步法合成 4-
氨基取代的邻苯二甲
酰亚胺的方法,该方法产率高,甚至可以达到极佳的产率,而且可以耐受多种取代基。生成的一些化合物显示出有趣的溶解变色特性,在非极性溶剂中具有高荧光量子产率,而在极性原溶剂中则显著降低。其中许多化合物显示出无毒特性和不可检测的非特异性结合,因此有可能与底物相连并用作荧光探针。此外,还发现了具有
生物活性和荧光的 4-
氨基取代邻苯二甲
酰亚胺,其在基于细胞的检测中的 IC50 值在低微摩尔范围内,可用于研究吸收和分布。因此,所开发的简便合成方法不仅对构建荧光探针和荧光
生物活性化合物以获取目标结合信息非常有价值,而且从结构活性的角度来看,在邻苯二甲
酰亚胺具有活性的各个领域也非常有价值。