electron donating substituents on the ring and some coumarins (coumarin, 6-methylcoumarin, 7-methylcoumarin) under the action of dialkyl H-phosphonate (RO)2P(O)H (R = Et, n-Bu, i-Pr), based on catalytic oxidation of arene and H-phosphonate (1:1) mixture in electrochemically mild conditions (room temperature, normal pressure) using the bimetallic catalyst system MnIIbpy/NiIIbpy (1%). This method produces a
Electrochemical phosphorylation of arenes catalyzed by cobalt under oxidative and reductive conditions
作者:S. O. Strekalova、V. V. Grinenko、T. V. Gryaznova、A. I. Kononov、E. L. Dolengovski、Y. H. Budnikova
DOI:10.1080/10426507.2018.1540488
日期:2019.5.27
Abstract Catalyst capable to operate in cathode and anode spaces simultaneously was found. Electrochemical regeneration of active form of catalyst Co2+bpy (1%) under oxidative as well as reductive conditions allows the C–H/P–H coupling of dialkyl-H-phosphonate and various aromatic or heteroaromatic compounds. Graphical Abstract
Electrochemical phosphorylation of coumarins catalyzed by transition metal complexes (Ni—Mn, Co—Mn)
作者:S. O. Strekalova、M. N. Khrizanforov、T. V. Gryaznova、V. V. Khrizanforova、Yu. H. Budnikova
DOI:10.1007/s11172-016-1451-7
日期:2016.5
A possibility of electrochemical phosphorylation of coumarins (coumarin, 6-methylcoumarin, 7-methylcoumarin) with diethyl phosphite was shown. The approach is based on the oxidation of a mixture of the aromatic compound and diethyl phosphite (1: 1) under mild conditions (room temperature, atmospheric pressure) in the presence of a bimetallic catalytic systems: MnIIbipy/NiIIbipy and MnIIbipy/CoIIbipy
The phosphonyl radical generated from the reaction of manganese(III) acetate with diethyl phosphonate selectively adds to the 3-position of flavones and coumarins to afford phosphonylated products in moderate to good yields. manganeseacetate - phosphonylation - flavones - coumarins - dialkyl phosphonate - freeradical