定制各类格氏试剂

问题:氯化专家,请指导,谢谢
类型:求助 (悬赏分:3分)
提问:lijunbin02
等级:
版块:药物化学(jaywoo,合成小象,)
信誉:0%
回复:11
阅读:1071
时间:2007-11-18 11:35:13  编辑    加入/取消收藏    订制/取消短消息    举报该贴    

2-氯甲基吡啶合成相关,谢谢,我不知道怎么合成,非常感谢指导
回复人:afc,★★ (氟化学产品) 时间:2007-11-18 11:50:02   编辑 1楼
2-chloromethyl-pyridine

A mixture of 200 g (2.15 moles) of .alpha.-picoline and 7 g of benzamide in 750 ml of chloroform was refluxed and 270 g (1.16 mole) of trichlorisocyanuric acid (min. 90% available chlorine) were added thereto in portions over 5 hours. The mixture was stirred for another 5 hours and then cooled. 1200 ml of water and 400 g of 50% potassium hydroxide were added to the mixture with stirring. The decanted aqueous phase was extracted with 250 ml of chloroform, and the combined chloroform phases were dried over MgSO.sub.4 and carefully evaporated at 30.degree. C. under reduced pressure to obtain 181 g of 2-chloromethyl-pyridine (66% yield) with a boiling point of 77.degree.-82.degree. C. at 15 mm Hg which quickly turned red.


回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2007-11-18 11:35:57   编辑 2楼
邮箱:jidanhun@163.com


回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2007-11-18 12:18:27   编辑 3楼
这个要用到四氯化碳,又不用四氯化碳的方法吗?


回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2007-11-18 13:23:14   编辑 4楼
目前企业生产是用什么方法生产的?


回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2007-11-24 12:48:54   编辑 5楼
大家多多发表评论哈


回复人:albe24, () 时间:2007-11-24 13:05:17   编辑 6楼
trichlorisocyanuric acid
是个好东西,值得使用!!!!!!!


回复人:xiaoyaolcl,★★★★★ (由于爱好,所以从事) 时间:2007-11-24 13:40:09   编辑 7楼
四氯化碳已经禁止使用,一般可以用邻二氯苯做氯化反应的溶剂


回复人:maurice,★★ (自信,乐观,富于激情,积极面对人生) 时间:2007-11-26 08:09:15   编辑 8楼
用4-氯三氟甲基苯替代四氯化碳,这个溶剂很不错。


回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2007-12-01 14:56:23   编辑 9楼
谢谢


回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2007-12-01 14:57:06   编辑 10楼
谢谢
4-氯三氟甲基苯 和 trichlorisocyanuric acid 都贵不?多少钱一吨阿



回复人:lijunbin02, (我爱我自己,也爱大家) 时间:2008-10-22 09:22:07   编辑 11楼
已经打分了!


得分人:albe24 :1, xiaoyaolcl :1, maurice :1,


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