کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5276864 | 1385567 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of effective Lewis acids for the catalytic Diels-Alder reaction of α,β-unsaturated lactones with cyclopentadiene
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
We found that 'Tf2CH2 + Me3Al' systems are effective catalytic systems for the DA reaction of less reactive α,β-unsaturated lactone derivatives, compared to α,β-unsaturated ester derivatives, with cyclopentadiene. Mononuclear aluminum methide complex, Tf2CHAlMe2, as an active species is formed in these catalytic systems. Effects of lactone ring-size on the reactivity and stereoselectivity were also examined. By expanding ring-size, reactivity of α,β-unsaturated lactones reduced but endo-selectivity notably increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 48, Issue 17, 23 April 2007, Pages 2993-2997
Journal: Tetrahedron Letters - Volume 48, Issue 17, 23 April 2007, Pages 2993-2997
نویسندگان
Hikaru Yanai, Arata Takahashi, Takeo Taguchi,