Oxidative ammonolysisreaction of wheat soda lignin and wood kraft lignin was studied.
对麦草碱木质素和木材硫酸盐木质素的氧化氨解反应进行研究。
2
Screening for 2 - bromo-butyric acid as the starting material, after ammonolysis, esterification, ester amine solution, split, five-step cyclization reaction Levetiracetam.
筛选以2 -溴代丁酸为起始原料,经氨解,酯化,酯胺解,拆分,环合五步反应制得左乙拉西坦。
3
Levetiracetam was prepared from L-methionine via reduction-dethiomethylation, esterification, ammonolysis, amidation and intramolecular cyclocondensation reaction with 44.6% overall yield.