• 基礎釋義
• 例句

• The that sulfamic acid is an excellent catalyst for synthesis of acetophenone cyclic ethylic ketal. 以氨基磺酸為催化劑,通過苯乙酮和乙二醇反應合成苯乙酮環乙二縮酮.
• Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent. 方法: 以甲醇為溶劑,以對羥基苯乙酮和溴為原料制備了α - 溴-4-芐氧苯基苯乙酮.
• Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced. 目的: 報道一種合成α - 溴-4-芐氧苯基乙酮的新方法.
• Thus , this reduced temperature of reaction and increased the rate of acetophenone. 降低反應溫度,提高了苯乙酮的收率.