关于三氟醋酸的作用？ 看到一篇文献，是合成酰胺的，但是不知道为啥要用三氟醋酸，原文如下“to the suspension of acetamido benzoic acid (6, 7.5 g, 0.041 mol) in 75 ml thf was added cdi (7.5 g, 0.046 mol) portionwise at room temperature. the reaction mixture was stirred for 1 h to form acylimidazole followed by addition of 1,2-phenylenediamine (36.2 g, 0.335 mol) and tfa (4.19 g, 0.036 mol, 2.8 ml) and stirring for 16 h. the reaction mixture was then filtered to afford crude ci-994”大家来给出出主意查看更多
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