Synthesis and catalytic application of magnesium complexes bearing pendant indolyl ligands.
Three novel indole-based ligand precursors [HIndPh(R), R = methoxy, HIndPh(OMe) (); thiomethoxy, HIndPh(SMe) (); and N,N'-dimethylamino, HIndPh(NMe2) ()] have been synthesized via Sonogashira and cyclization reactions with moderate to high yield. Reactions of these ligand precursors with 0.6 equivalent of Mg(n)Bu2 in THF afforded the magnesium bis-indolyl complexes , respectively. All the ligand precursors and related magnesium complexes have been characterized by NMR spectroscopy and elemental analyses. The molecular structures are reported for compounds and . Under optimized conditions, compound demonstrates efficient catalytic activities towards the ring opening polymerization of l-lactide and ε-caprolactone in the presence of BnOH.
Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan. ctchen@dragon.nchu.edu.tw.
Kuo-Fu
KF
Peng
Yun
Y
Chen
Chi-Tien
CT
Chen
D002384:Catalysis; D060326:Chemistry Techniques, Synthetic; D007211:Indoles / Q000737:chemistry*; D008024:Ligands; D008274:Magnesium / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D058105:Polymerization
D007211:Indoles; D008024:Ligands; D009942:Organometallic Compounds; D008274:Magnesium