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
Development, Scope, and Applications of Titanium(III)-Catalyzed Cyclizations to Aminated N-Heterocycles
作者:Leonardus H. Leijendekker、Jens Weweler、Tobias M. Leuther、Daniel Kratzert、Jan Streuff
DOI:10.1002/chem.201805909
日期:2019.3.1
their synthesis by modern catalytic methods. This full paper presents the development and extended scope of the new cyclization methodology. The transformation of the products into fused bis‐indoles is also demonstrated along with the discovery of an unusual palladium‐catalyzed reductive biphenyl coupling reaction. The titanium(III)‐catalyzed cyclization has also been applied to the synthesis of substituted