Thus , this reduced temperature of reaction and increased the rate of acetophenone.降低反应温度,提高了苯乙酮的收率.Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced.目的: 报道一种合成α - 溴-4-苄氧苯基乙酮的新方法....
Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent.方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.Thus , this reduced temperature of...
Many folk songs have " refrains ", that is, regularly repeated independent elements attached to each stanza.许多民歌有 “ 重复句 ”, 即每一段都有规则地重复出现的单独句.Aesthetic taste and the level of technic refrains the handicraftTujia brocade.审...
罗伊用简单的、人人都能理解的语言讲述了他那个伤感的故事。Roy told his sorrowful tale with simple words anybody could understand.人人都只考虑自己，谁落后谁倒霉。Every one for himself and the devil take the hindmost.她穿得花里胡哨，这样人人都会对她有印象。She dressed flamboyantly so tha...