Copper-catalyzed carbon–carbon bond cleavage of primary propargyl alcohols: β-carbon elimination of hemiaminal intermediates
作者:Ye-Won Kang、Yu Jin Cho、Kwang-Youn Ko、Hye-Young Jang
DOI:10.1039/c5cy00783f
日期:——
The copper-catalyzed cleavage of carbon–carbon bonds in primary propargyl alcohols under oxygen was investigated. This process involves the formation and fragmentation of hemiaminals from aldehydes (oxidized alcohols) and amines. This reaction mechanism was supported by the formation of N-formyl amines and GC experimental results.
Cupric oxide nanowires on three-dimensional copper foam for application in click reaction
作者:Chunxia Wang、Fan Yang、Yan Cao、Xing He、Yushu Tang、Yongfeng Li
DOI:10.1039/c7ra00014f
日期:——
effective heterogeneous catalysts for the 1,3-dipolar cycloaddition (CuAAC) reaction without using any additional support and bases. Examination of CuO nanowire catalysts synthesized at various temperatures showed that the use of CuO-600 catalyst was the best choice for the success of the present click reaction. Not only aromatic and heteroaromatic alkynes but also alkylalkynes were catalyzed regioselectively
The synthesis of an easily accessible theophylline-derived copper complex with additional ammonium functionalization has been developed.
已开发出一种易于获取的茶碱衍生铜配合物合成方法,其中还具有额外的铵功能化。
2-Pyrrolecarbaldiminato–Cu(<scp>ii</scp>) complex catalyzed three-component 1,3-dipolar cycloaddition for 1,4-disubstituted 1,2,3-triazoles synthesis in water at room temperature
作者:Changjian Zhou、Jie Zhang、Ping Liu、Jianwei Xie、Bin Dai
DOI:10.1039/c4ra13423k
日期:——
2-Pyrrolecarbaldiminato–Cu(ii) complexes were first established as efficient catalyst for 1,4-disubstituted 1,2,3-triazoles synthesis under green and mild reaction conditions.
Copper nanoparticles supported on silica coated maghemite as versatile, magnetically recoverable and reusable catalyst for alkyne coupling and cycloaddition reactions
presented. The catalyst has been prepared under mild conditions by fast reduction of anhydrous CuCl2 with lithium sand and a catalytic amount of DTBB (4,4’-di-tert-butylbiphenyl) as electron carrier, in the presence of the magnetic support. The catalyst has been fully characterized and its performance in different coupling and cycloaddition reactions of terminalalkynes has been studied. This new copper-based