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Polymers 2015, 7(10), 1954-1964;

Magnesium Pyrazolyl-Indolyl Complexes as Catalysts for Ring-Opening Polymerization of L-Lactide

Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Changle Chen
Received: 8 September 2015 / Revised: 20 September 2015 / Accepted: 23 September 2015 / Published: 5 October 2015
(This article belongs to the Special Issue Metal-Mediated Polymer Synthesis)
PDF [988 KB, uploaded 5 October 2015]


A series indole-based ligand precursors, PzRIndH (R = H, PzHIndH; R = Me, PzMeIndH;R = t-Bu, PztBuIndH; and R = Ph, PzPhIndH), have been synthesized via copper-catalyzed N-arylation (for PzHIndH) or the Bartoli indole synthesis (for PzMeIndH, PztBuIndH and PzPhIndH) reactions with moderate to high yield. Reactions of these ligand precursors with 0.7 equivalentof MgnBu2 in THF (for 1) or hexane (for 2–4) afforded the bis-indolyl magnesium complexes 1–4,respectively. All the ligand precursors and related magnesium complexes have been characterizedby NMR spectroscopy and elemental analyses. The molecular structure is reported for compound 1.These novel magnesium complexes demonstrate efficient catalytic activities for the ring-opening polymerization of L-lactide in the presence of alcohol. View Full-Text
Keywords: magnesium; pyrazolyl; indolyl; ring-opening polymerization; biodegradable magnesium; pyrazolyl; indolyl; ring-opening polymerization; biodegradable

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Chen, C.-T.; Lin, D.-H.; Peng, K.-F. Magnesium Pyrazolyl-Indolyl Complexes as Catalysts for Ring-Opening Polymerization of L-Lactide. Polymers 2015, 7, 1954-1964.

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