Univ.Chem.2023,38(2),177–184177收稿:2022-05-06;录用:2022-06-16;网络发表:2022-06-29*通讯作者,Email:fengwenfang@mail.hust.edu.cn基金资助:中央高校基本科研业务费HUST(2020kfyXJJS095)•化学实验•doi:10.3866/PKU.DXHX202205011www.dxhx.pku.edu.cn格氏试剂的合成实验改进张恒,幸志荣,刘冬,周志彬,冯文芳*华中科技大学化学与化工学院,武汉430074摘要:采用二异丁基氢化铝(DIBAH)替代分子碘,对格氏试剂的合成实验进行了改进,系统研究了DIBAH引发对反应体系安全性的影响,以及不同结构卤代烃底物在DIBAH引发下对格氏反应速率的影响。结果表明,添加2%(摩尔分数,以卤代烃的摩尔量为基础)的DIBAH,可以在温和(20°C)条件下,高效合成苯基溴化镁、正丁基溴化镁等两种典型的格氏试剂,并能获得比分子碘引发体系更高产率的格氏反应产物。本工作通过提高格氏试剂合成反应的安全性,加强学生对实验安全的重视,引导学生关注化工产业实践中的实际问题。通过对反应体系的优化和结构解析,引导学生将基础知识活学活用、融会贯通。关键词:实验安全;格氏试剂;三苯甲醇;2-甲基-2-己醇中图分类号:G64;O6ImprovementonSynthesisofGrignardReagentHengZhang,ZhirongXing,DongLiu,ZhibinZhou,WenfangFeng*SchoolofChemistryandChemicalEngineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,China.Abstract:Inthiswork,thesynthesisofGrignardreagentisimprovedbyreplacingmoleculariodinewithdiisobutylaluminumhydride(DIBAH).SystematicinvestigationsontheinfluenceofDIBAHinitiationonthesafetyofthereactionsystemandthechemicalstructureofhaloalkanesareperformed.Ithasbeendemonstratedthattheadditionof2mol%DIBAH(vs.themolarcontentofhaloalkanes)allowsthereactiontotakeplaceundermildcondition(20°C),yieldingphenylmagnesiumbromideandn-butylmagnesiumbromidewithhighefficiency.WiththeimprovedsafetyonmodifiedGrignardreactions,thestudentscouldgetadeeperunderstandingontheimportanceofsafetyinchemicalreactions.Inparticular,thepresentworkcouldalsohelpstudentstopayattentiontosafetyoforganicexperimentsandthedilemmasencounteredbypracticalapplications,andbettercopewiththegapbetweenfundamentalresearchandindustrialapplications.KeyWords:Experimentalsafety;Grignardreagent;Triphe...