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[1]董志兵,操 强,高 帆,等.一种大剂量制备KNOCHEL锌试剂的方法[J].武汉工程大学学报,2015,37(07):16-18.[doi:10. 3969/j. issn. 1674-2869. 2015. 07. 004]
 ,,et al.Practical synthetic procedure for KNOCHEL type zinc reagents in large scale[J].Journal of Wuhan Institute of Technology,2015,37(07):16-18.[doi:10. 3969/j. issn. 1674-2869. 2015. 07. 004]
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一种大剂量制备KNOCHEL锌试剂的方法(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
37
期数:
2015年07期
页码:
16-18
栏目:
化学与化学工程
出版日期:
2015-07-31

文章信息/Info

Title:
Practical synthetic procedure for KNOCHEL type zinc reagents in large scale
文章编号:
1674-2869(2015)07-0016-03
作者:
董志兵操 强高 帆 刘 方王 敏 王稼伟
武汉工程大学化学与环境工程学院,湖北 武汉 430074
Author(s):
DONG Zhi-Bing CAO Qiang GAO Fan LIU Fang WANG Min WANG Jia-Wei
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China
关键词:
KNOCHEL锌试剂制备
Keywords:
KNOCHEL zinc reagents preparatio
分类号:
O621
DOI:
10. 3969/j. issn. 1674-2869. 2015. 07. 004
文献标志码:
A
摘要:
有机锌试剂倾向于和过渡金属作用而发生转金属化反应,所生成的这些过渡金属中间体有着很高的活性,从而可以与很多亲电试剂高效地进行反应,在有机合成中占有非常重要的地位. 通常制备锌试剂的方法是锌粉对卤代烃的插入反应,但是这种方法制备的锌试剂的合成效率往往不高,对一些敏感的基团的耐受性不太强. 在无机盐氯化锂存在下能有效地制备KNOCHEL锌试剂,报道一种大剂量方式(100 mmol)制备KNOCHEL锌试剂的方法,该法能高效高选择性地制备有机锌试剂,生成的锌试剂产率高(80%~91%),稳定性强,该试剂对各种敏感的官能团(如酯基、氰基、羰基、三氟甲基)的耐受性强.这些锌试剂在氩气保护下存放1个星期后,其活性没有明显降低.
Abstract:
Organic zinc reagents play very important roles in organic synthesis, since they are tending to transmetallation with other transition metals, which posses high reactivities and can be quenched easily with many electrophiles. The traditional preparation of organic zinc reagents is using the zinc insertion reaction of halogen hydrocarbons, which sometimes shows low yield, and the prepared zinc reagents could not be tolerated with very sensitive functional groups. A practical synthetic procedure for KNOCHEL type zinc reagents in large scale(100 mmol)is reported. With the addition of LiCl, the zinc reagents can be prepared with high yields(80%-91%), the prepared KNOCHEL type zinc reagents show good tolerance to very sensitive functional groups, such as ester group, cyano group, carbonyl group and trifluoromethyl group etc. Under argon storage, the reactivity of KNOCHEL type zinc reagents does not decrease obviously after one week.

参考文献/References:

[1] FURSTNER A. Recent advancements in the Reformatsky reaction[J]. Synthesis,1989(8): 571-590.[2] NAKAMURA M, HIRAI A, NAKAMURA E. Reaction pathways of the Simmon-Smith reaction[J]. J Am Chem Soc, 2003, 125: 2341-2350.[3] KNOCHEL P, SINGER R D. Preparation and reactions of polyfunctional organozinc reagents in organic synthesis [J]. Chem Rev, 1993, 93: 2117-2188.[4] ERDIK E. Transition metal catalyzed reactions of organozinc reagents[J]. Tetrahedron,1992,48: 9577-9648.[5] DONG Z B, MANOLIKAKES G, SHI L,et al, Structure-reactivity relationships in Negishi cross-coupling reactions [J]. Chem Eur J,2010,16: 248-253.[6] DONG Z B, CLOSOSKI G C, WUNDERLICH S, et al.Direct zincation of functionalized aromatics and heterocycles by using a magnesium base in the presence of ZnCl2[J]. Chem Eur J,2009,15: 457-468.[7] KRASOVSKIY A, MALAKHOV V, GAVRYUSHIN A, et al. Efficient synthesis of functionalized organozinc compounds by the direct insertion of zinc into organic iodides and bromides[J]. Angew Chem Int Ed,2006,45:6040-6044.

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备注/Memo

备注/Memo:
收稿日期:2015-4-21基金项目:国家自然科学基金项目(21302150);教育部留学回国人员基金项目[2012]1707;湖北省教育厅重点基金项目(D20131501);武汉工程大学研究生创新基金项目(CX2013011);武汉工程大学校长基金项目(2014038)作者简介:董志兵(1980-),男,湖北鄂州人,教授,博士. 研究方向:金属有机化学尧有机合成方法.
更新日期/Last Update: 2015-08-25