带有侧链氨基酚盐配体的锂配合物的结构与催化研究。

Structural and catalytic studies of lithium complexes bearing pendant aminophenolate ligands.

作者信息

Huang Chi-An, Ho Chia-Lin, Chen Chi-Tien

机构信息

Department of Chemistry, National Chung Hsing University, Taichung, 402, Taiwan.

出版信息

Dalton Trans. 2008 Jul 14(26):3502-10. doi: 10.1039/b717370a. Epub 2008 Mar 17.

DOI:10.1039/b717370a

PMID:18580988

Abstract

Lithium complexes bearing mono-anionic aminophenolate ligands are described. Reactions of ligand precursors HON(Me)Ph(OMe), HON(Me)Ph(SMe), HON(Me)C(OMe) or HON(Me)C(NMe2) [HON(Me)Ph(OMe) = (2-OMeC6H4CH2)N(Me)(CH2-2-HO-3,5-C6H2((t)Bu)2); HON(Me)Ph(SMe)= (2-SMe-C6H4CH2)N(Me)(CH2-2-HO-3,5-C6H2((t)Bu)2); HON(Me)C(OMe) = (MeOCH(2)CH2)N(Me)(CH2-2-HO-3,5-C6H2((t)Bu)2); HON(Me)C(NMe2) = (Me2NCH2CH2)N(Me)(CH2-2-HO-3,5-C6H2((t)Bu)2)] with 1.1-1.3 molar equivalents of (n)BuLi in diethyl ether solution afford (LiON(Me)Ph(OMe))(2) (3), (LiON(Me)Ph(SMe))2 (4), (LiON(Me)C(OMe))2 (5) and (LiON(Me)C(NMe2))2 (6) as dinuclear lithium complexes. The BnOH adduct of , (BnOH)(LiON(Me)C(OMe)) (7), was prepared from the reaction of and BnOH in diethyl ether solution. The molecular structures are reported for ligand precursor HON(Me)Ph(SMe) and compounds 3-5 and 7. These dinuclear lithium complexes show excellent catalytic activities toward the ring-opening polymerization of L-lactide in the presence of benzyl alcohol.

摘要

描述了带有单阴离子氨基酚盐配体的锂配合物。配体前体HON(Me)Ph(OMe)、HON(Me)Ph(SMe)、HON(Me)C(OMe)或HON(Me)C(NMe2) [HON(Me)Ph(OMe) = (2 - OMeC6H4CH2)N(Me)(CH2 - 2 - HO - 3,5 - C6H2((t)Bu)2); HON(Me)Ph(SMe)= (2 - SMe - C6H4CH2)N(Me)(CH2 - 2 - HO - 3,5 - C6H2((t)Bu)2); HON(Me)C(OMe) = (MeOCH(2)CH2)N(Me)(CH2 - 2 - HO - 3,5 - C6H2((t)Bu)2); HON(Me)C(NMe2) = (Me2NCH2CH2)N(Me)(CH2 - 2 - HO - 3,5 - C6H2((t)Bu)2)]与1.1 - 1.3摩尔当量的正丁基锂在乙醚溶液中反应，得到双核锂配合物(LiON(Me)Ph(OMe))2 (3)、(LiON(Me)Ph(SMe))2 (4)、(LiON(Me)C(OMe))2 (5)和(LiON(Me)C(NMe2))2 (6)。(BnOH)(LiON(Me)C(OMe)) (7)的苄醇加合物是由在乙醚溶液中反应制备得到的。报道了配体前体HON(Me)Ph(SMe)以及化合物3 - 5和7的分子结构。这些双核锂配合物在苄醇存在下对L - 丙交酯的开环聚合显示出优异的催化活性。