An article Ru-Catalyzed (E)-Specific ortho-C-H Alkenylation of Arenecarboxylic Acids by Coupling with Alkenyl Bromides WOS:000649477300059 published article about DIRECT ORTHO ARYLATION; CARBOXYLIC-ACIDS; BENZOIC-ACIDS; BOND; PALLADIUM; HYDROARYLATION; OLEFINATION; ARYL; ALKYNES; ACTIVATION in [Hu, Zhiyong; Belitz, Florian; Zhang, Guodong; Papp, Florian; Goossen, Lukas J.] Ruhr Univ Bochum, Evonik Chair Organ Chem, D-44801 Bochum, Germany in 2021, Cited 68. The Name is 3-Methylbenzoic acid. Through research, I have a further understanding and discovery of 99-04-7. COA of Formula: C8H8O2
In the presence of [p-cymene)RuCl2](2), (E)-configured alkenyl bromides couple with aromatic carboxylates to form orthovinylbenzoic acids. This C-H vinylation proceeds in high yields without any activating phosphine ligands and has an excellent functional group tolerance. Starting from commonly available (E/Z)-mixtures of alkenyl bromides, (E)-configured vinyl arenes or dienes are formed exclusively. Mechanistic studies show that this selectivity is achieved because the (E)configured alkenyl bromides undergo a smooth coupling, whereas the (Z)-isomers are rapidly eliminated with the formation of alkynes.
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Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com