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                鄰羥基苯乙酮生產廠家,安陽惠豐生物科技有限公司為您提供鄰羥基苯乙酮、對羥基苯乙酮、醋酸苯酯等相關信息發布和資訊,敬請關注!

                鄰乙酰氧基苯乙酮

                來源:http://www.bbb596.com/product224463.html   發布于:2019/7/18 17:47:40
                鄰乙酰氧基苯乙酮

                     鄰乙酰氧基苯乙酮的制備方法,其特征在于它包括如下步驟:

                     1、在鹵代苯中加入Lewis酸和苯酚,在溫度為35~45℃條件下,滴加乙酰氯,在溫度為50~55℃條件下,攪拌回流0.5~1小時,然后升溫100~105℃,反應2~3小時;

                     2、將步驟1中的反應產物降至室溫,以鹽酸/冰溶液進行水解,分出有機相,冷凍后過濾,得到濾餅;

                     3、將步驟2中的濾餅在水中重結晶,得到對羥基苯乙酮,將步驟2中的濾液進行減壓蒸餾,得到鄰羥基苯乙酮;

                     4、將步驟3中的對羥基苯乙酮和乙酸酐在溫度為40~50℃條件下,加入催化量的吡啶,反應1~1小時,反應結束后在環己烷中重結晶得到產物對乙酰氧基苯乙酮;

                     5、將步驟3中的鄰羥基苯乙酮和乙酸酐在溫度為40~50℃條件下,加入催化量的濃硫酸,反應1~1小時,反應結束后反應液用水洗,再用95%乙醇重結晶得到產物鄰乙酰氧基苯乙酮。

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