A possible mechanism for the cyclizationreaction was suggested.
提出了可能的环化反应机理。
2
The appropriate reaction conditions of cyclizationreaction: NaOEt was 1.4 mole eq.
合环反应的条件为：乙醇钠的用量为1.4摩尔当量；
3
Screening for 2 - bromo-butyric acid as the starting material, after ammonolysis, esterification, ester amine solution, split, five-step cyclizationreaction Levetiracetam.