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双季铵盐相转移催化剂具有用量少、催化活性高的特点,比单官能团相转移催化剂的催化性能更为显著。手性季铵盐是进行不对称
Double quaternary ammonium salt phase transfer catalyst with less dosage, high catalytic activity than monofunctional phase-transfer catalyst catalytic performance is more significant. Chiral quaternary ammonium is asymmetric