An Efficient Heterogeneous Palladium(0)-Catalysed Cross-Coupling between 1-Bromoalkynes and Terminal Alkynes Leading to Unsymmetrical 1,3-Diynes
作者:Zhaotao Xu、Jinting Ai、Mingzhong Cai
DOI:10.3184/174751918x15208574638459
日期:2018.3
efficient heterogeneous palladium(0)-catalysed cross-coupling of 1-bromoalkynes with terminal alkynes was achieved in DMF at room temperature in the presence of 5 mol% of MCM-41-immobilised bidentate phosphine palladium(0) complex [MCM-41-2P-Pd(0)] and 2 mol% of CuI with Et3N as base, yielding a variety of unsymmetrical 1,3-diynes in moderate to good yields. This heterogeneous palladium(0) complex
在 5 mol% 的 MCM-41 固定化双齿膦钯 (0) 络合物 [MCM-41] 存在下,室温下在 DMF 中实现了 1-溴炔烃与末端炔烃的高效异相钯 (0) 催化交叉偶联-2P-Pd(0)] 和 2 mol% 的 CuI,以 Et3N 为碱,以中等至良好的产率产生各种不对称的 1,3-二炔。这种异质钯 (0) 络合物可以通过反应溶液的简单过滤轻松回收,并至少循环 7 次而不会显着降低活性。