Decarboxylative Suzuki–Miyaura coupling of (hetero)aromatic carboxylic acids using iodine as the terminal oxidant
作者:Jacob M. Quibell、Guojian Duan、Gregory J. P. Perry、Igor Larrosa
DOI:10.1039/c9cc01817d
日期:——
of (hetero)aromaticcarboxylicacids with arylboronic acids. The scope of this decarboxylative Suzuki reaction has been greatly diversified, allowing for previously inaccessible non-ortho-substituted aromaticacids to undergo this transformation. The procedure also benefits from low catalyst loadings and the absence of stoichiometric transition metal additives.
Regioselectivity of the methanolysis of polychlorinated biphenyls
作者:T. Sh. Khaibulova、I. A. Boyarskaya、V. A. Polukeev、V. P. Boyarskii
DOI:10.1134/s1070363216100121
日期:2016.10
Regioselectivity of the methanolysis of lower polychlorinated biphenyls with sodium methoxide in a mixture of methanol and DMSO at 100–130°С was studied. It was found that 2,4,4'-tricholobiphenyl is much more reactive than 2,4-dichlorobiphenyl. This results in different mechanisms of substitution. 2,4-Dichlorobiphenyl reacts with sodium methoxide by the elimination–addition mechanism to form four monosubstitution