24小时热门版块排行榜

返回列表

本帖产生 1 个翻译EPI ，点击这里进行查看

594306435

银虫 (小有名气)

应助: 1 (幼儿园)
金币: 505.7
帖子: 162
在线: 42.1小时
虫号: 716245

[交流] 帮忙翻译一段话

用亚磷酸三乙酯代替三苯基膦所制得的磷Ylide与醛酮反应称为Wittig-Horner反应。该反应有两个优点：一是它容易和醛酮反应，有些有三苯基膦制备的磷叶立德，特别是当α碳上带有羰基时，比较稳定，不容易和酮带有，有时需加入苯甲酸作为催化剂。二是反应中的另一产物，O,O-二乙基磷酸钠溶于水，无需像三苯基膦的叶立德时，还需要分离三苯氧膦。三是磷酸酯的反应，立体选择性很强，产物主要是反式。

回复此楼

» 猜你喜欢

各位大神，目前国内有哪些比较好用的逆合成软件？已经有14人回复
国社科系统bug了，是不是要放榜了？已经有10人回复
现代”学阀”该如何界定已经有9人回复
课题组招2027级博士上海工程技术大学激光智能制造方向已经有4人回复
上海工程技术大学激光智能制造课题组 2027级博士研究生招生已经有3人回复
上海工程技术大学激光智能制造课题组｜2027级博士研究生招生公告已经有11人回复
申博发邮件已经有11人回复
我的奶奶已经有3人回复

» 抢金币啦！回帖就可以得到:

查看全部散金贴

1楼 2011-04-11 10:58:41

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

slz146

木虫 (正式写手)

594306435(金币+15, 翻译EPI+1): 谢谢 2011-04-16 18:58:17

Triethyl phosphate which was instead of Triphenylphosphine was prepared for P-ylide . Wittig-Horner reaction was Defined as the reaction of Keto-Aldehyde and above P-ylide . This reaction had two advantages: The first was that it could react with Keto-Aldehyde easily , some P-ylide which was prepared by Triphenylphosphine , especially as there was carbonyl on α-Cedrene , it was Relatively stable and it could not be with ketone easily , sometimes it might be needed benzoic acid as catalyst . The second was that Another product of the reaction: O, O - diethyl sodium was soluble in water , Triphenylphosphine oxide did not need to be separated when P-ylide was prepared by Triphenylphosphine . The third was that the reaction of phosphoric ester had very strong stereoselectivity , and the product of the reaction was mainly antiform .

赞一下