Copper(I) 1,2,3-Triazol-5-ylidene Complexes as Efficient Catalysts for Click Reactions of Azides with Alkynes
作者:Tatsuhito Nakamura、Takahiro Terashima、Kenichi Ogata、Shin-ichi Fukuzawa
DOI:10.1021/ol102858u
日期:2011.2.18
Complexes of copper with 1,4-diphenyl, 1,4-dimesityl, and 1-(2,6-diisopropylphenyl)-4-(3,5-xylyl)-1,2,3-triazol-5-ylidene (abnormal NHC = N-heterocyclic carbene) were prepared by consecutive treatment of the corresponding azolium salts with silver oxide and copper chloride. The new CuCl(aNHC) complexes efficiently catalyzed click reactions of azides with alkynes to give 1,4-substituted 1,2,3-triazoles
铜与1,4-二苯基,1,4-二苯甲基和1-(2,6-二异丙基苯基)-4-(3,5-二甲苯基)-1,2,3-三唑-5-亚烷基的配合物(异常通过用氧化银和氯化铜连续处理相应的偶氮盐制备NHC =N-杂环卡宾。新的CuCl(aNHC)配合物可有效催化叠氮化物与炔烃的点击反应,在室温下以短时间反应以优异的收率得到1,4-取代的1,2,3-三唑。CuCl(TPh)对于位阻叠氮化物与炔烃之间的反应特别有效。