ionic-liquid-supported tin reagents were synthesized and used in Stillecross-couplingreactions. High yields of biaryls were obtained under low-temperature, solvent-free, ligand-free conditions, with simple purification techniques. Moreover, the tin compound could be recycled up to five times without significant loss of reactivity. An expanded catalytic cycle for the Stille cross coupling reaction is proposed in
Facile synthesis of polymerized ionic liquids with high thermal stability
作者:Yu-Nung Hsieh、Chun-Hsiung Kuei、Yu-Kai Chou、Chia-Chyuan Liu、Kuen-Lin Leu、Tasi-Hsiu Yang、Mei-Ying Wang、Wen-Yueh Ho
DOI:10.1016/j.tetlet.2010.05.038
日期:2010.7
Twelve main-chain-type polymerized ionic liquids that have alkylimidazolium cation units were prepared using simple synthetic processes. The polymers were prepared using the self-polymerization of a single monomer; no polymerization initiators were required. The thermal stability and solvent miscibility of these polymers were studied. Results show that the combined anions greatly influence the solubility and thermal stability of the polymers. Among these polymers, poly-alkylimidazolium bis(trifluoromethylsulfonyl)imide polymers exhibited the highest thermal stability (>400 degrees C), which makes them candidates for many applications. (C) 2010 Elsevier Ltd. All rights reserved.
IIZUKA, KINJI;AKAHANE, KENJI;MOMOSE, DEN-ICHI;NAKAZAWA, MASAYUKI;TANOUCHI+, J. MED. CHEM., 1981, 24, N 10, 1139-1148