کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9770153 | 1501940 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbon-bridged biphenolate lanthanide complexes: synthesis and their catalytic activity for the Diels-Alder reaction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
Reaction of anhydrous ErCl3 with sodium salt of carbon-bridged biphenolate, MBMPNa2 (MBMP2â=2,2â²-methylene-bis (6-tert-butyl-4-methyl-phenoxo)), in 1:2 molar ratio in THF at room temperature gave the lanthanide 'ate' complexes (THF)Er(MBMP)2Na(THF)2 (1) in high isolated yield. Similarly reaction of anhydrous SmCl3 with 2Â equiv. of MBMPNa2 in THF, then crystallization from toluene in the presence of TMEDA, afforded the final product (THF)Sm(MBMP)2Na(TMEDA) (2). Both complexes 1 and 2 were well characterized by elemental analysis, IR spectra, and X-ray diffraction analysis. Preliminary results revealed that these complexes are able to act as Lewis acid to catalyze the Diels-Alder reaction of cyclopentadiene with methyl acrylate in good activity and stereoselectivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 743, Issues 1â3, 31 May 2005, Pages 163-168
Journal: Journal of Molecular Structure - Volume 743, Issues 1â3, 31 May 2005, Pages 163-168
نویسندگان
Xiaoping Xu, Mengtao Ma, Yingming Yao, Yong Zhang, Qi Shen,