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A novel N-acetophenone cinchona ammonium salts as chiral phase transfer catalysts for the alkylation of Schiff base in water

✍ Scribed by Xin Wang; Jian Lv; Lei Liu; Yongmei Wang; Yang Wu

Book ID: 103834737
Publisher: Elsevier Science
Year: 2007
Tongue: English
Weight: 301 KB
Volume: 276
Category: Article
ISSN: 1381-1169
DOI: 10.1016/j.molcata.2007.05.011

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✦ Synopsis

Novel N-acetophenone cinchona ammonium salts have been successfully synthesized and used as chiral phase transfer catalysts for the asymmetric alkylation of tert-butyl benzophenone Schiff base derivatives in aqueous media at room temperature with the highest ee and yield up to 96 and 98%, respectively. We have also studied the influence of substituted acetophenone groups in quaternary ammonium salts derived from the cinchona alkaloids.

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