| 查看: 991 | 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
关于filecode，很负责任的告诉大家
已经有7人回复
-
【2027博士申请】纳米药物递送方向
已经有5人回复
-
关于豆爷回答的JTJC与%2F数量
已经有7人回复
-
2026国自然放榜时间
已经有3人回复
-
国基金的申报应该改成非等额制，评价高的钱多评价低的钱少，但是增加资助率
已经有7人回复
-
好奇怪的filecode
已经有4人回复
-
售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急
已经有4人回复
-
售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急
已经有4人回复
-
售SCI文章，我:8O.5.5.1O.54,科目全,可十急
已经有4人回复
-
售SCI一区T0P文章，我:8.O.55.1.O.54,科目齐全,可+急
已经有5人回复
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
3楼2009-03-29 15:38:54
★
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
6楼2009-03-31 15:18:16
20
