I found the field of Chemistry very interesting. Saw the article Rh-Catalyzed Direct Carboxylation of Alkenyl C-H Bonds of Alkenylpyrazoles published in 2020.0. Quality Control of Methyl 3-phenylpropionate, Reprint Addresses Iwasawa, N (corresponding author), Tokyo Inst Technol, Dept Chem, Meguro Ku, 2-12-1 O Okayama, Tokyo 1528551, Japan.. The CAS is 103-25-3. Through research, I have a further understanding and discovery of Methyl 3-phenylpropionate
The Rh-catalyzed direct carboxylation of alkenyl C-H bonds was achieved by using pyrazole as a removable directing group. In the presence of 5 mol% RhCl3 . 3H(2)O, 6 mol% P(Mes)(3), and 2 equiv. of AlMe2(OMe), the alkenyl C-H bond of various alkenylpyrazoles was directly carboxylated in good yields under CO2 atmosphere. Furthermore, several useful transformations of the pyrazole moiety of the product were achieved to afford synthetically useful carboxylic acid derivatives in good yields.
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Reference:
Patent; SANOFI; US2011/294788; (2011); A1;,
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