《2,5-Dihydroxyterephthalic Acid Accelerated Cu(NO3)2.3H2O-Catalyzed Homocoupling Reaction of Arylboronic Acids》 was published in Letters in Organic Chemistry in 2020. These research results belong to Wu, Fengtian; Nan, Chenlong; Xie, Jianwei; Ma, Mingyang. Category: pyridine-derivatives The article mentions the following:
A catalyst system derived from com. available Cu(NO3)2.3H2O and 2,5-dihydroxyterephthalic acid is applied to the homocoupling reaction of arylboronic acids. This transformation provides a convenient approach to sym. biaryls with good to excellent yields (39%- 95%), and exhibits good functional group compatibility. Furthermore, biaryl can be prepared in gram quantities in good yield. In the experimental materials used by the author, we found 2-Pyridinylboronic acid(cas: 197958-29-5Category: pyridine-derivatives)
2-Pyridinylboronic acid(cas: 197958-29-5) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Category: pyridine-derivatives