کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5274747 | 1385518 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly enantioselective Friedel-Crafts alkylation of indole and pyrrole with β,γ-unsaturated α-ketoester catalyzed by chiral dicationic palladium complex
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Highly enantioselective Friedel-Crafts alkylation of indole and pyrrole with β,γ-unsaturated α-ketoester catalyzed by chiral dicationic palladium complex Highly enantioselective Friedel-Crafts alkylation of indole and pyrrole with β,γ-unsaturated α-ketoester catalyzed by chiral dicationic palladium complex](/preview/png/5274747.png)
چکیده انگلیسی
The chiral dicationic Pd complexes, bearing sterically demanding diphosphine ligands as Lewis acid catalysts, are shown to catalyze the asymmetric Friedel-Crafts (F-C) alkylations of indoles and pyrroles with β,γ-unsaturated α-ketoesters, to provide the F-C alkylation products with benzylic stereocenters in high yields and enantioselectivities. The reactive chelated structure, formed by the chiral dicationic Pd complex and the electrophile, would be important to gain a high level of asymmetric induction in the F-C alkylation. The F-C products can be readily functionalized to give α-hydroxy esters via catalytic asymmetric ene sequences.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 52, Issue 50, 14 December 2011, Pages 6682-6686
Journal: Tetrahedron Letters - Volume 52, Issue 50, 14 December 2011, Pages 6682-6686
نویسندگان
Kohsuke Aikawa, Kazuya Honda, Shunsuke Mimura, Koichi Mikami,