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Binaphthyl-Modified Quaternary Phosphonium Salts as Chiral Phase-Transfer Catalysts: Asymmetric Amination of β-Keto Esters

✍ Scribed by Rongjun He; Xisheng Wang; Takuya Hashimoto; Keiji Maruoka

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 291 KB
Volume: 120
Category: Article
ISSN: 0044-8249
DOI: 10.1002/ange.200804140

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## Abstract **Chiraler PTC**: Eine hoch effiziente asymmetrische Michael‐Addition von 3‐Aryloxindolen gelang mit einem Tetraalkylphosphoniumsalz als chiralem Phasentransferkatalysator (PTC). Die Produkte wurden in nahezu quantitativen Ausbeuten und mit hohen __ee__‐Werten erhalten. Derselbe Katalys