The subject invention provides an expedited synthesis of 5, 6, and 7-iodoindenes from the corresponding aminoindan-1-ones in more than 70% yield, employing readily available precursors and reagents. A three-step sequence involves diazotization-iodination of aminoindan-1-one followed by reduction and dehydration. The method has a general character and can be extended for the preparation of various 4-, 5-, 6- or 7-haloindenes using different halogen sources for diazotization-halogenation reaction.
Transition-metal-free α-arylation of α-nitroketones with diaryliodonium salts has been realized for the first time. As an application of this methodology, a concise synthesis of the clinical drug tiletamine was also achieved via a three-step procedure from 2-nitrocyclohexanone without the isolation of intermediates.
Benzolactone und Benzocarbocyclen durch Ringerweiterung von Benzocycloalkenonen
作者:Erwin Benkert、Manfred Hesse
DOI:10.1002/hlca.19870700823
日期:1987.12.16
Benzolactones and Benzocarbocycles by Ring Enlargement of Benzocycloalkenone Derivatives
苯并环烯酮衍生物的环扩大作用引起的苯甲内酯和苯并碳环化合物
Potassium channel inhibitors
申请人:ICAgen
公开号:US20020161011A1
公开(公告)日:2002-10-31
Compounds useful as potassium channel inhibitors and especially useful for the treatment of cardiac arrhythmias and cell proliferative disorders are described.