Amphoteric 2-(sulfonylamino)benzaldehydes, secondary amines and isocyanides in the multicomponent synthesis of elusive N -alkyl-2,3-diaminoindoles
作者:Mariateresa Giustiniano、Sveva Pelliccia、Luca Sangaletti、Fiorella Meneghetti、Jussara Amato、Ettore Novellino、Gian Cesare Tron
DOI:10.1016/j.tetlet.2017.09.076
日期:2017.11
A novel interrupted Ugi reaction between ortho-sulfonylaminated aryl aldehydes, secondary amines, and isocyanides affords in good to high yields N-alkyl-2,3-diaminoindoles, providing access to a so far unexplored area of the indole chemical space. With only one single chemical operation, this novel reaction affords a broad gamma of substituted 2,3-diaminoindoles with five points of diversity. The success
在邻-磺酰化的芳基醛,仲胺和异氰酸酯之间的新型中断的Ugi反应提供了良好至高产率的N-烷基-2,3-二氨基吲哚,从而提供了迄今为止尚未开发的吲哚化学空间的通道。仅需一次化学操作,这一新颖的反应就可得到具有5个多样性点的宽广的γ取代的2,3-二氨基吲哚。这种新颖的多组分转化方法的成功在于存在两性磺酰氨基,该两性磺酰氨基可依次用作布朗斯台德酸和亲核试剂,无需额外的催化剂,且经济性高,仅损失一分子水,使这种方法非常有效。