英语语法分析

Preparing alkenyl halide from aldehyde and ketone.

以醛酮为原料合成卤代乙烯类化合物。

The dissertation describes some selective methods for the synthesis of alkenyl sulfides and benzothiazole derivatives.

本论文主要开展了乙烯基硫醚和苯并噻唑衍生物的选择性合成方法的研究。

The research worked on the preparation of starch sodium alkenyl succinate. Various methods were compared and major factor was discussed.

研究了十二烯基琥珀酸淀粉酯的合成机理，比较了几种制备方法，探讨了主要的影响因素。