کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1327115 977464 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Palladium0-catalyzed isomerization of (Z)-1-functionalized-4-acetoxy-2-butenes: Solvent and substituent effects
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Palladium0-catalyzed isomerization of (Z)-1-functionalized-4-acetoxy-2-butenes: Solvent and substituent effects
چکیده انگلیسی

The Pd(PPh3)4-catalyzed isomerization of (Z)-1,4-diacetoxy-2-butene, (Z)-1-(t-butyldimethylsilyloxy)-4-acetoxy-2-butene and (Z)-1-(t-butyldiphenylsilyloxy)-4-acetoxy-2-butene affords the corresponding (E)-isomers and 1,2-difunctionalized-3-butenes. In THF, the formation of the (E)-isomers is mainly due to reaction from an η1-allylpalladium intermediate while an η3-allylpalladium is the main key intermediate in DMF. The time to reach equilibrium between the products and their respective concentrations depend on the nature of the substituents and the solvent.

The mechanism of the isomerization of the substrate is solvent dependent. The time to reach equilibrium between the three compounds, and their respective concentrations depend on the nature of Y and solvent.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 695, Issue 1, 1 January 2010, Pages 62–66
نویسندگان
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