Cobalt-catalyzed borylation of aryl halides and pseudohalides was written by Yao, Wubing;Fang, Huaquan;Peng, Sihan;Wen, Huanan;Zhang, Lei;Hu, Aiguo;Huang, Zheng. And the article was included in Organometallics in 2016.Reference of 519054-55-8 This article mentions the following:
We report the first Co-catalyzed borylation of aryl halides and pseudohalides with bis(pinacolato)diboron (B2pin2). The synthesis of two new Co(II) complexes of oxazolinylferrocenylphosphine ligands 1-R2P-2-(4-Me-2-Ox) (2-Ox = 2-oxazolinyl; L1, R = Ph, L2, R = iPr) and their cobalt complexes [(Ln)CoCl2] (2a, R = Ph, 2b, R = iPr) is described. Crystal structures of 2a,b were determined Upon activation with LiMe, the Co complex catalyzes the borylation reactions of aryl bromides, iodides, sulfonates, arenediazonium salts, and even aryl chlorides under mild conditions, providing the borylated products ArBpin in excellent to moderate yields and with high functional group tolerance. In the experiment, the researchers used many compounds, for example, 2-(Benzofuran-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 519054-55-8Reference of 519054-55-8).
2-(Benzofuran-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (cas: 519054-55-8) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. In nature, benzofurans have occupied an important role among the plant phenols & several pharmacologically active compounds.Reference of 519054-55-8
Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem