Gold-Catalyzed Synthesis of Substituted Tetrahydronaphthalenes
作者:Christiane M. Grisé、Louis Barriault
DOI:10.1021/ol062582g
日期:2006.12.1
We report a gold-catalyzed benzannulation of 3-hydroxy-1,5-enynes to generate tetrahydronaphthalenes. This mild process proves to be an effective method to synthesize various metasubstituted aromatic rings in good yields. [reaction: see text]
Gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes: an efficient synthesis of substituted tetrahydronaphthalenes and related compounds
作者:Christiane M. Grisé、Eric M. Rodrigue、Louis Barriault
DOI:10.1016/j.tet.2007.10.084
日期:2008.1
We report a novel gold(I)-catalyzed benzannulation of 3-hydroxy-1,5-enynes to prepare tetrahydronaphthalenes. The reaction is catalyzed by 2.5 mol % Ph3PAuCl and 2.5 mol % AgOTf in dichloromethane. We discovered that this process can be also catalyzed by 1 mol % Ph3PAuCl and 1 mol % TfOH. To the best of our knowledge, this constitutes the first report of an active gold catalyst generated from Au(PPh3)Cl
Arene-ruthenium complexes immobilized on polymers, catalysts consisting of the complexes, and processes for organic syntheses with the same
申请人:Kobayashi Shu
公开号:US20050119416A1
公开(公告)日:2005-06-02
A novel polymer-supported arene-ruthenium complex represented by the following formula:
wherein A represents an organic polymer with a side chain containing an aromatic ring coordinated to Ru, X
1
and X
2
represent the same or different halogen atoms, and R represents a hydrocarbon group that may have a substituent is provided for use as a catalyst. This novel polymer-supported arene-ruthenium complex and catalyst thereof can be produced by a simple process, are stable and easy to recover, have a high catalytic activity, and can be used for various organic synthesis reactions. Novel methods for an organic synthesis reaction such as ring-opening metathesis reaction of an olefin compound and reduction of a carbonyl group, using the catalyst are provided.
一种新型聚合物支撑的炔钌络合物,由下式表示:
其中 A 代表一种有机聚合物,其侧链含有与 Ru 配位的芳香环,X
1
和 X
2
代表相同或不同的卤素原子,R 代表可能具有取代基的烃基。这种新型聚合物支撑的炔钌配合物及其催化剂可以通过简单的工艺生产,性质稳定,易于回收,具有很高的催化活性,可用于各种有机合成反应。提供了使用该催化剂进行有机合成反应(如烯烃化合物的开环偏合成反应和羰基的还原反应)的新方法。