安徽快3

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有機鋅化合物的反應和介紹

在下列許多反應中,有機鋅化合物安徽快3都作為中間體參與反應:

1、XIMENGSI–SHIMISIFANYINGZHONG,KABIN(DIANJIAJI)DIANHUAXINHEXIJINGFANYINGDEDAOHUANBINGWAN。

安徽快32、YU1863NIANFAXIANDEFrankland-DuppaFANYINGZHONG,CAOSUANZHI(ROCOCOOR)HELUDAIWANJINGR’X、XINHEYANSUANFANYING,SHENGCHENGα-QIANJISUOSUANZHIRR’COHCOOR[8]

3、YIGUIFULIZI(Acetylides)XINYANDEFANYING。

4、有機鋅試劑對于羰基的加成反應。1899年發現的Barbier反應使用鋅代替鎂進行格氏加成反應,而該反應更溫和;反應條件更簡單。有機鹵鎂試劑進行加成反應時,任何水的存在將導致反應無法進行;然而Babier反應甚至能夠在水存在下進行反應。有機鋅試劑的劣勢在于親核性弱于格氏試劑。在所有12族元素中,鋅是最具活性的。商業可售的二烴基鋅化合物包括:二甲基鋅、二乙基鋅和二苯基鋅。這些試劑價格都昂貴且難于操作和控制。在一項研究中,[9][10] 活性有機鋅化合物可通過更廉價的有機溴化合物(Organobromine)前體獲得:

5、LEIFUERMACIJIFANYINGTONGGUOXINLUZHONGJIANTIZHUANHUAα-LUDAIZHIHEQUANDEDAOβ-QIANJIZHI。

YOUJIXINHUAHEWUSHIZHIHANYOUTAN-XINHUAXUEJIANDEYILEIYOUJIHUAHEWU。YOUJIXINHUAXUESHIYIMENYANJIUYOUJIXINHUAHEWULIHUAXINGZHI、HECHENGHEFANYINGDEXUEKE。[1][2][3][4] ?DIYIGEBEIFAXIANHEZHIBEIDEYOUJIXINHUAHEWUSHIERYIJIXIN(Diethylzinc)(YOUEdward FranklandYU1849NIANFAXIAN)。TAHUANSHIDIYIGEBEIFAXIANJUYOUJINSHU-TANσJIANDEHUAHEWU。XUDUOYOUJIXINHUAHEWUDOUSHIYIRANDEERNANYICAOZUODE(DADUOSHUYOUJIRONGJITONGYANGKERANERCUNZAIANQUANYINHUAN)。YOUJIXINHUAHEWUDADUOYIYUYANGHUA,QIERONGYUZHIZIXINGRONGJISHIHUIFASHENGFENJIE。ZAIXUDUOFANYINGZHONG,YOUJIXINSHIJIDOUXUYAOXIANZHIXIANYONGERBUNENGBEIFENLICHUNHUAHUOCUNFANGTAIJIU。SUOYOUSHIYONGYOUJIXINSHIJIDEFANYINGDOUXUYAOZAIDUOXINGQITIBAOHUXIAJINXING,RUDANQIHUOYAQI。 ?YOUJIXINHUAHEWUZUICHANGJIANDEYANGHUATAIWEI+2JIA。TAKEYIBEIFENWEISANZHONGLEIXING:YOUJIXINLUHUAHEWU(R-Zn-X,QIZHONGXDAIBIAOLUSUYUANZI);ERJINGJIXINHUAHEWU(R-Zn-R,QIZHONGRDAIBIAOWANJIHUOFANGJI);XINSUANLIYANHUOXINSUANMEIYAN(M+R3Zn-,QIZHONGMDAIBIAOLIHUOMEI)。 YOUYUTANHEXINYUANSUDEDIANFUXINGBUTONG:(TANWEI2.55;XINWEI1.65),TAN-XINHUAXUEJIANDEJIXINGZHIXIANGTANYUANZI。ERJINGJIXINHUAHEWUTONGCHANGYIDANTIXINGTAICUNZAI,ERYOUJIXINLUHUAHEWUZEKETONGGUOLUSUJIANQIAOXINGCHENGJUHEXINGTAI,GAIXINGTAILEISIYUGESHISHIJIHEGESHISHIJIDEDESchlenkPINGHENG(Schlenk equilibrium)。

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