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Bis-quaternary cinchona alkaloid salts as asymmetric phase transfer catalysts
Bis-quaternary cinchona alkaloid salts as asymmetric phase transfer catalysts
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机译:双季金鸡纳生物碱盐作为不对称相转移催化剂
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摘要
The invention is directed to novel bis-quarternary cinchona alkaloid salts and the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis. The present invention is directed to novel bis-quarternary cinchona alkaloid salts and the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis. On certain substrates and under specific reaction conditions, the inventors have discovered that the use of bis-quarternary cinchona alkaloid salts in asymmetric phase transfer catalysis surprisingly provides for a more active and efficient process as compared to mono-quarternary catalysts.
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