کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1326005 1499924 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Asymmetric epoxidation of unfactionalized olefins catalyzed by chiral salen Mn(III) immobilized onto sulfoalkyl modified zirconium poly(styrene-isopropenyl phosphonate)-phosphate and zirconium poly(styrene-phenylvinyl phosphonate)-phosphate
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Asymmetric epoxidation of unfactionalized olefins catalyzed by chiral salen Mn(III) immobilized onto sulfoalkyl modified zirconium poly(styrene-isopropenyl phosphonate)-phosphate and zirconium poly(styrene-phenylvinyl phosphonate)-phosphate
چکیده انگلیسی

Chiral salen Mn(III) complex has been supported onto sulfoalkyl-modified zirconium poly(styrene-isopropenyl phosphonate)-phosphate and zirconium poly(styrene-phenylvinyl phosphonate)-phosphate (ZPS-IPPA and ZPS-PVPA) by axial coordination. The supported catalysts showed higher chiral induction for enantioselective epoxidation of styrene, α-methylstyrene and indene than its homogeneous chiral salen Mn(III). In addition, ZPS-PVPA-supported catalyst (4c), with a larger pore diameter, was found to be more active than ZPS-IPPA-based catalyst (3c). The influence of the linkage lengths on the catalytic performance was investigated. What's more, the catalysts were easily separated from the reaction systems and could be reused for several times without significant loss of catalytic activity.

Chiral salen Mn(III) complex has been supported onto sulfoalkyl modified zirconium poly(styrene-isopropenyl phosphonate)-phosphate and zirconium poly(styrene-phenylvinyl phosphonate)-phosphate (ZPS-IPPA and ZPS-PVPA).Figure optionsDownload as PowerPoint slideHighlights
► A special type of hybrid material was easily prepared in mild conditions.
► The catalysts were conveniently separated from the reaction system.
►  All the immobilized catalysts exhibited great activity and enantioselectivity.
► These catalysts showed better catalytic effect for bulkier olefins such as indene.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 713, 15 August 2012, Pages 157–162
نویسندگان
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