Catalytic Reductive Synthesis and Direct Derivatization of Unprotected Aminoindoles, Aminopyrroles, and Iminoindolines
作者:Leonardus H. Leijendekker、Jens Weweler、Tobias M. Leuther、Jan Streuff
DOI:10.1002/anie.201702310
日期:2017.5.22
A titanium(III)-catalyzed radical cyclization to unprotected 3-aminoindoles, 3-aminopyrroles, or 3-iminoindolines is reported. The reaction is non-hazardous, scalable, and allows facile isolation of the free products by extraction. The method is demonstrated on a large substrate scope and it further allows the direct installation of various nitrogen protecting groups or the synthesis of building blocks
报道了钛(III)催化的自由基环化成未保护的3-氨基吲哚,3-氨基吡咯或3-亚氨基二氢吲哚。该反应是无害的,可扩展的,并且允许通过萃取容易地分离游离产物。该方法在较大的底物范围内得到了证明,它还允许直接安装各种氮保护基团或以单一顺序合成肽化学的基础材料。熔融双吲哚可直接从环化产物中获得。