Electrochemical benzylic C-H arylation of xanthenes and thioxanthenes without a catalyst and oxidant was written by Gao, Hui;Chen, Xinyu;Wang, Pei-Long;Shi, Meng-Meng;Shang, Ling-Long;Guo, Heng-Yi;Li, Hongji;Li, Pinhua. And the article was included in Organic Chemistry Frontiers in 2022.SDS of cas: 496-16-2 This article mentions the following:
A catalyst-free and oxidant-free C-H arylation of xanthenes and thioxanthenes I (R1 = H, Me, OH, Cl, etc.; R2 = H, OMe; R3R4 = -CH=CH-CH=CH-; X = O, S) using electrochem. has been developed, which affords a number of cross-coupling products II (R5 = 4-methoxyphenyl, 4-methoxy-3-methylphenyl, 4-methoxy-3,5-dimethylphenyl, 2H-1,3-benzodioxol-5-yl, etc.) in moderate to good yields. This method is atom- and step-economical as it uses cheap and easily available arenes and heteroarenes as partners directly and the C(sp2)-H/C(sp3)-H type cross-coupling reaction. In the experiment, the researchers used many compounds, for example, 2,3-Dihydrobenzo[b]furan (cas: 496-16-2SDS of cas: 496-16-2).
2,3-Dihydrobenzo[b]furan (cas: 496-16-2) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.SDS of cas: 496-16-2
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem