Pd-Catalyzed Decarbonylative C-H Coupling of Azoles and Aromatic Esters was written by Matsushita, Kaoru;Takise, Ryosuke;Hisada, Tomoya;Suzuki, Shin;Isshiki, Ryota;Itami, Kenichiro;Muto, Kei;Yamaguchi, Junichiro. And the article was included in Chemistry – An Asian Journal in 2018.Electric Literature of C9H7NS This article mentions the following:
A decarbonylative C-H coupling of azoles and aromatic esters by palladium catalysis was described. Previously reported Ni-catalyzed C-H coupling of azoles and aromatic esters had a significant drawback regarding the substrate scope. Herein, palladium catalysis employed instead of nickel and resulted in a broader substrate scope in terms of azoles and aromatic esters. In the experiment, the researchers used many compounds, for example, 5-Phenylthiazole (cas: 1826-13-7Electric Literature of C9H7NS).
5-Phenylthiazole (cas: 1826-13-7) belongs to thiazole derivatives. The higher aromaticity of thiazole is due to delocalization of a lone pair of sulfur electrons across the ring, which is evidenced by chemical shifts of ring hydrogen at δ 7.27 and 8.77 ppm (C2 and C4), indicating diamagnetic ring current. Thiazole sulfonation occurs only under forcing conditions: the action of oleum at 250 °C for 3 hours in the presence of mercury(II) sulfate leads to 65% formation of 5-thiazole sulfonic acid.Electric Literature of C9H7NS
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica