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Numerous improvements are obtained by employing the amine in molar excess with respect to benzyl halide, preferably in a molar ratio of 2 to 1. 通過使用相對(duì)于芐基鹵為摩爾過量的胺可以得到大量改善， 優(yōu)選的摩爾比為2至1。 ip.com