| 查看: 872 | 回复: 8 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[交流]
【求助】硫酰氯苯环氯化
|
|||
|
各位大虾，请问高手，是否有人知道用硫酰氯作氯化剂进行苯环氯化 请站内消息联系我，谢谢！！！ [ Last edited by mooncakexzj on 2009-3-29 at 15:50 ] |
回复此楼» 猜你喜欢
0703化学调剂 348分
已经有13人回复
-
327求调剂
已经有8人回复
-
材料307分求大佬组收留
已经有9人回复
-
求调剂
已经有33人回复
-
293调剂
已经有15人回复
-
求调剂求调剂
已经有11人回复
-
22408 266求调剂
已经有10人回复
-
一志愿211，化学310分，本科重点双非，求调剂
已经有8人回复
-
一志愿0703化学招61最终排名62化学求调剂
已经有10人回复
-
一志愿2110，化学学硕310分，本科重点双非求调剂
已经有4人回复
7楼2009-03-31 15:59:27
3楼2009-03-29 15:38:54
xqj666666
铁杆木虫 (小有名气)
- 应助: 0 (幼儿园)
- 金币: 8876.5
- 帖子: 212
- 在线: 12.1小时
- 虫号: 582245
- 注册: 2008-07-25
- 性别: GG
- 专业: 污染控制化学
4楼2009-03-31 11:53:11
★
nealu(金币+1,VIP+0):谢谢应助！ 3-31 15:28
nealu(金币+1,VIP+0):谢谢应助！ 3-31 15:28
|
在OS上有一片文章,你可以看看. 对羟基苯甲酸乙酯的氯化. Ethyl 3,5-dichloro-4-hydroxybenzoate. A tared 2-l. round-bottomed flask is equipped with an efficient reflux condenser connected through a calcium chloride drying tube to a gas-absorption trap, and is set up on a steam bath in a hood. In the flask are placed 250 g. (1.5 moles) of ethyl 4- hydroxybenzoate (Note 1) and 444 g. (266 ml., 3.3 moles) of sulfuryl chloride. The mixture is warmed on the steam bath (gently at first) until gas is no longer evolved (about 1 hour). Then 50 ml. of sulfuryl chloride is added to the reaction flask, and the warming is continued until gas is no longer evolved. This entire chlorination procedure requires about 1.5 hours. The excess sulfuryl chloride is then removed by attaching a water pump through an empty safety flask to the reaction flask and warming on the steam bath until no evidence of vapor can be detected above the white solid in the reaction flask. The residue in the flask should weigh about 350 g. (Note 2). Recrystallization from a mixture of 600 ml. of ethanol and 140 ml. of water gives 315–334 g. (83–88%) of ethyl 3,5-dichloro-4-hydroxybenzoate hydrate (Note 3) melting at 110–114° with decomposition. http://www.orgsyn.org/orgsyn/pdfs/CV3P0267.pdf [ Last edited by TJFWAL on 2009-3-30 at 19:01 ] |
5楼2009-03-31 15:00:30
10