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Synthesis, crystal structure and application in regio- and stereoselective epoxidation of allylic alcohols of a titanium binaphthyl-bridged Schiff base complex
被引:21
作者:
Soriente, A
[1
]
De Rosa, M
[1
]
Lamberti, M
[1
]
Tedesco, C
[1
]
Scettri, A
[1
]
Pellecchia, C
[1
]
机构:
[1] Univ Salerno, Dipartimento Chim, I-84081 Baronissi, SA, Italy
关键词:
binaphthyl-bridged Schiff base ligands;
epoxidation;
Ti(IV) complexes;
allylic alcohols;
microwave reactions;
D O I:
10.1016/j.molcata.2005.03.012
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A new octahedral titanium binaphthyl-bridged Schiff base complex (1) was synthesized and characterized. Analysis by H-1 and C-13-NMR spectroscopy and X-ray crystallography indicated that the C-1-symmetric cis-beta isomer is preferentially formed as one of the two possible enantiomeric couples of diasteroisomers. The catalytic behaviour of the complex 1 toward epoxidation of allylic alcohols was investigated. Using only 0.5% mol of the complex 1 the epoxyalcohols are obtained in very high regio-, chemo- and diastercoselctive way by the MW exposure of the mixture in solvent free-conditions. (c) 2005 Elsevier B.V. All rights reserved.
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页码:253 / 259
页数:7
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