کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5266831 | 1385321 | 2011 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New dimerization and cascade oligomerization reactions of dimethyl 2-phenylcyclopropan-1,1-dicarboxylate catalyzed by Lewis acids
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: New dimerization and cascade oligomerization reactions of dimethyl 2-phenylcyclopropan-1,1-dicarboxylate catalyzed by Lewis acids New dimerization and cascade oligomerization reactions of dimethyl 2-phenylcyclopropan-1,1-dicarboxylate catalyzed by Lewis acids](/preview/png/5266831.png)
چکیده انگلیسی
New routes to transform donor-acceptor cyclopropanes in the presence of Lewis acids have been found. The reaction of dimethyl 2-phenylcyclopropan-1,1-dicarboxylate, a typical representative of this class of compounds, with an equimolar amount of anhydrous GaCl3 gives, depending on the reaction time, (2-phenylethylidene)malonate or styrylmalonate after hydrolysis, whereas in the presence of 15-20 mol % GaCl3 the starting cyclopropane undergoes dimerization to give the malonic derivative of 3,4-diphenylcyclopentane-1,1-dicarboxylate. In the presence of the GaCl3·THF complex, the same cyclopropane gives a substituted 4-phenyltetraline-2,2-dicarboxylate in high yield, whereas in the presence of SnCl4·THF it gives the dimer specified above along with products of chain oligomerization, the degree of which can be controlled by changing the concentration of the starting cyclopropane in solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 52, Issue 39, 28 September 2011, Pages 4996-4999
Journal: Tetrahedron Letters - Volume 52, Issue 39, 28 September 2011, Pages 4996-4999
نویسندگان
Roman A. Novikov, Victor A. Korolev, Vladimir P. Timofeev, Yury V. Tomilov,