Synthesis of a new class of cationic Pd(II) complexes with 1,2,3-triazol-5-ylidene ligand and their catalytic application in the conversion of internal alkynes to 1,2-diketones
作者:Jeelani Basha Shaik、Venkatachalam Ramkumar、Sethuraman Sankararaman
DOI:10.1016/j.jorganchem.2018.02.011
日期:2018.4
Pd(II) complexes of the type [Pd(Tz)(Cl)(bipy)]+Cl− and [Pd (Tz)(Cl)(phen)]+Cl− (Tz = 1,4-diaryl-3-methyl-1,2,3-triazol-5-ylidene, bipy = 2,2′-bipyridine and phen = 1,10-phenanthroline) with various wing tip groups were synthesized from the corresponding 1,2,3-triazolium iodide via the corresponding chloro bridged dinuclear complexes [(Tz)(Cl)Pd(μ-Cl)2Pd(Cl)(Tz)]. The synthesized cationic complexes were
一类新的式[钯(TZ)(CL)(联吡啶)]的阳离子的Pd(II)配合物的+氯-和[钯(TZ)(CL)(phen)的] +氯-(TZ = 1,4从相应的1,2,合成具有各种侧翼末端基团的(-diaryl-3-methyl-1,2,3-triazol-5-ydlene,bipy = 2,2'-bipyridine和phen = 1,10-phenothroline),通过相应的氯桥联双核络合物[(Tz)(Cl)Pd(μ-Cl)2 Pd(Cl)(Tz)]生成碘化3-三唑鎓。筛选了合成的阳离子络合物的炔烃水合催化活性,发现其对内炔烃以良好的收率选择性转化为相应的1,2-二酮极好。提出了一种合理的机制进行这种转换。