NOVEL METHODS FOR PREPARATION OF SUBSTITUTED PYRIDINES AND RELATED NOVEL COMPOUNDS
申请人:Watkins Edmond Blake
公开号:US20200095245A1
公开(公告)日:2020-03-26
The present invention relates to novel methods of preparation of substituted pyridines and the compounds produced therefrom. In particular, the present invention provides efficient methods for the construction of diversely substituted pyridines, with varying substitution patterns under simple and metal-free conditions with high atom- and pot-economy and excellent functional group tolerance, and which are useful for the synthesis of natural products.
The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.
An efficient, unified approach for the synthesis of β-carbolines, γ-carbolines, and other fused azaheteroaromatics has been realized under metal-free conditions, from propargylic amines and (hetero)aromatic aldehydes. This unified strategy provides β- and γ-carbolines as well as a range of fused azaheteroaromatics with a broad substrate scope and excellent functional group compatibility. The formal
An efficient synthesis of carbazoles from PtCl2-catalyzed cyclization of 1-(indol-2-yl)-2,3-allenols
作者:Wangqing Kong、Chunling Fu、Shengming Ma
DOI:10.1039/b909649c
日期:——
The PtCl2-catalyzed reaction of 1-(indol-2-yl)-2,3-allenols occurred smoothly to form carbazoles by connecting the 3-carbon atom of indole with the 4-carbon atom of the allenol moiety, referring to the carbon atom connected to the hydroxyl group.
Rapid Access to 3-Substituted Pyridines and Carbolines via a Domino, Copper-free, Palladium-Catalyzed Sonogashira Cross-Coupling/6π-Aza Cyclization Sequence
Herein, we report a one-pot, three-component method for the preparation of 3-substituted pyridines and carbolines via copper-free, palladium-catalyzed Sonogashira cross-coupling with aryl iodides, followed by 6π-aza cyclization. This arylation cross-coupling/annulation cascade provides easy access to substituted, fused pyridines from readily available substrates in good yields (67–92%) with complete