کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
68031 48501 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics of vinylation of 4′-bromoacetophenone with n-butyl acrylate using palladacycle catalyst
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Kinetics of vinylation of 4′-bromoacetophenone with n-butyl acrylate using palladacycle catalyst
چکیده انگلیسی

The kinetics of vinylation of 4′-bromoacetophenone (4′-BAP) with n-butyl acrylate (n-BA) has been studied using palladacycle catalyst precursor 1, in the presence of sodium acetate (NaOAc) as a base and tetrabutylammonium bromide (TBAB) as a promoter in N-methyl-2-pyrrolidinone (NMP) solvent. The rate was found to be first order with respect to 4′-BAP, fractional order with the catalyst, and first order tending to zero order with NaOAc concentration. The rates passed through a maximum with variation of TBAB and n-butyl acrylate concentrations. The rate data have been analyzed to propose an empirical model, which is in good agreement with the mechanism already established for Heck reactions using palladacycle catalysts.

The kinetics of vinylation of 4′-bromoacetophenone with n-butyl acrylate has been studied using palladacycle catalyst precursor 1, in the presence of NaOAc as a base and tetrabutylammonium bromide as a promoter in N-methyl-2-pyrrolidinone as solvent. The rate of reaction was found to be first order with respect to 4′-BAP, half order with the catalyst, and first order tending to zero with NaOAc concentration. The rates passed through a maximum with variation of TBAB and n-butyl acrylate concentrations. The rate data have been analyzed to propose an empirical model, which is consistent with the mechanism already established for Heck reactions. Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 270, Issues 1–2, 1 June 2007, Pages 144–152
نویسندگان
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