Access to phthalazinones via palladium-catalyzed three-component cycloamino-carbonylation of 2-formylaryl tosylates, hydrazines and CO
作者:Bin Liu、Chunlei Zhang、Xigeng Zhou
DOI:10.1016/j.tet.2016.10.065
日期:2016.12
The palladium-catalyzed three-component cycloaminocarbonylation of 2-formylaryl tosylates with hydrazines and carbon monoxide has been established, which provides an efficient method for synthesis of substituted phthalazinones. In addition, by applying this protocol as the key step, Hydralazine can easily be synthesized in 65% yield.
Covalently Linked Acceptor−Donor Systems Based on Isoquinoline <i>N</i>-oxide Acceptor: Photoinduced Electron Transfer Produces Dual-Channel Luminescent Systems that Evolve Chemically to Photohydroxylation of the Aromatic Donor
charge-transfer (CT) state. Measurements of the corresponding electronic emission spectra revealed that these bichromophoric systems exhibit a dual fluorescence that is strongly dependent on the protonation of the N-oxide function and the donor ability. The CT state responsible for the red-shifted luminescence in the studied compounds is directly connected with the initial excitedstate S(1). On the basis