Copper complexes bearing C-scorpionate ligands: Synthesis, characterization and catalytic activity for azide-alkyne cycloaddition in aqueous medium
作者:Abdallah G. Mahmoud、Luísa M.D.R.S. Martins、M. Fátima C. Guedes da Silva、Armando J.L. Pombeiro
DOI:10.1016/j.ica.2018.08.052
日期:2018.11
sodium azide) cycloaddition reaction (CuAAC) to afford 1,4-disubstituted-1,2,3-triazoles, with 7 as the best catalyst. The catalytic reaction evolves well in ROH/H2O solution, depends on the R group and proceeds better when R = Me, here achieving yields up to 94%. The alcohol plays a role in the Cu(II)-to-Cu(I) Glaser-type induction period, therefore avoiding a reducing agent in the system.
CuX(X = Br或I)和[Cu(MeCN)4] [BF4]与中性C蝎子HC(3,5-Me2pz)3和HC(3-Phpz)3(Tpm ∗和TpmPh)的抽象反应,分别在室温下轻松进行,得到中性铜(I)络合物[CuBr(TpmPh)](1),[CuI(TpmPh)](2),[CuBr(Tpm ∗)](3),[CuI (Tpm ∗)](4)和阳离子[Cu(TpmPh)(NCMe)] [BF4](5),[Cu(TpmPh)(NCMe)] [BF4](6)和[Cu(Tpm ∗) 2] [BF4] 2(7),后者在空气中放置一段时间后也可以从6中获得。化合物1–7作为低功率微波辅助三组分(炔烃,溴苄基,叠氮化钠)环加成反应(CuAAC)的均相催化剂,提供1,4-二取代-1,2,3-三唑,其中7为最好的催化剂。在ROH / H2O溶液中,催化反应进展良好,取决于R基团,当R = Me时,催化反应进行得更好,此处的收率高达94%。