Sterically crowded triarylphosphines bearing cyano groups
作者:Shigeru Sasaki
DOI:10.1016/j.tetlet.2018.04.065
日期:2018.6
triarylphosphines bearing one, two, and three cyanogroups at 4-positions of aromatic substituents, namely, (4-cyano-2,6-diisopropylphenyl)n(2,4,6-triisopropylphenyl)3–nP (n = 1, 2, 3), were synthesized. Influence of the introduction of cyanogroups is clearly reflected to the oxidation potentials and the fluorescence wavelengths. As the number of cyanogroups increases, the oxidation potentials are raised
Stericallycrowdedtriarylphosphinesbearing naphthoquinone moieties were synthesized by the Suzuki−Miyaura coupling of the corresponding (phosphinoaryl)boronic acid derivatives with 2,3-dichloro-1,4-naphthoquinone. The triarylphosphine−naphthoquinone unit can be extended by employing a triarylphosphinebearing a chloronaphthoquinone moiety as a substrate. As an example, an oligomer bearing three triarylphosphine