24小时热门版块排行榜    

查看: 379  |  回复: 1
本帖产生 1 个 翻译EPI ,点击这里进行查看

zhangwei章薇

铁虫 (初入文坛)

[求助] 帮帮忙,翻译一下,谢谢!!

Synthetic procedure for the various 4-dialkylaminobenzaldehydes
    A mixture of aniline (0.26 g, 2.8 mmol), 1-alkylbromide (7.5 mmol), and K2CO3 (1.38 g, 10 mmol) in DMF (20 mL) was stirred for 24 h at 80 ℃ and then cooled to room temperature and poured into water and extracted with ether. After the solvent was removed by a rotatory evaporator, the crude product was dried in vacuo and then added to a stirring solution of phosphoryl trichloride (5 mL) and DMF (20 mL) at room temperature and stirred for 6 h. The resulting mixture was poured into       ice-water and extracted with ether. The solvent was evaporated and the crude product was separated by column chromatography on silica gel using hexane–ethyl acetate (15/1) as the eluent. Colourless or a slight yellow oil was obtained in high yields of 80–90%. These compounds were characterized by 1H NMR and the relative data was as follows.
学渣啊
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

ssssllllnnnn

至尊木虫 (知名作家)

Translator and Proofreader


【答案】应助回帖

★ ★ ★ ★ ★ ★ ★
RXMCDM: 金币+1, 多谢应助! 2014-09-16 12:19:46
zhangwei章薇: 金币+6, 翻译EPI+1 2014-09-17 09:48:57
各种4-二烷基氨基苯甲醛的合成过程
苯胺(0.26克,2.8毫摩尔),1 - 烷基溴化物(7.5毫摩尔)和K2CO3(1.38克,10毫摩尔)在DMF(20mL)中的混合物,在80℃搅拌24小时,然后冷却至室温,并倾入水中并用用乙醚萃取。用旋转蒸发器除去溶剂后,将粗制品在真空中干燥,然后加入到磷酰三氯(5毫升)和DMF(20mL)中在室温下搅拌6小时。将所得混合物倾入冰水中,并用乙醚萃取。蒸发溶剂后,用硅胶柱层析分离粗制品,用己烷 - 乙酸乙酯(15比1)作洗脱液。在80-90%的高收率处得到无色或淡黄色油。这些化合物用1H进行 NMR分析,相对数据如下。
2楼2014-09-16 11:26:44
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 zhangwei章薇 的主题更新
信息提示
请填处理意见