meta-Substituted triphenylamines as new dyes displaying exceptionally large Stokes shifts
摘要:
A straightforward synthesis of fluorescent tris-meta-substituted triphenylamines (m-TPAs) is presented These new fluorophores display a unique feature that is a remarkably high Stokes shift up to 250 urn, as compared to their para counterparts Although the mew substitution is made at the expense of the quantum yield, the latter is maintained at an appreciable level (5%) making the m-TPAs a new class of fluorophores adaptable to a large range of applications from biology to materials science (C) 2010 Elsevier Ltd All rights reserved
A AgNO3-mediated, efficient phosphorylation of thiazole rings with Ar2(O)PH was developed, which may produce a convenient route to the synthesis of various novel P,N-ligands.
Manganese(III) Acetate-Promoted Cross-Coupling Reaction of Benzothiazole/Thiazole Derivatives with Organophosphorus Compounds under Ball-Milling Conditions
作者:Liang Li、Jun-Jie Wang、Guan-Wu Wang
DOI:10.1021/acs.joc.6b00786
日期:2016.7.1
The first solvent-free manganese(III) acetate-promoted reaction of benzothiazole/thiazole derivatives with organophosphorus compounds including phosphine oxides, phosphinate ester, and phosphonate diester has been efficiently developed under ball-milling conditions, providing a highly efficient and green protocol to structurally diverse C2-phosphonylated benzothiazole/thiazole derivatives with remarkable
K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-Promoted Direct C-H Phosphorylation of (Benzo)thiazoles
作者:Weidong Lin、Feng Su、Hui-Jun Zhang、Ting-Bin Wen
DOI:10.1002/ejoc.201700022
日期:2017.4.3
The directphosphorylation of (benzo)thiazoles with various H-phosphine oxides was realized by using K2S2O8 as the oxidant. A series of 2-phosphoryl (benzo)thiazoles were obtained in moderate to good yields.
Visible-Light Photo-Arbuzov Reaction of Aryl Bromides and Trialkyl Phosphites Yielding Aryl Phosphonates
作者:Rizwan S. Shaikh、Simon J. S. Düsel、Burkhard König
DOI:10.1021/acscatal.6b02591
日期:2016.12.2
Aryl phosphonates are functional groups frequently found in pharmaceutical and crop protection agents. For their synthesis via C–P bond formation typically transition-metal-catalyzed reactions are used. We report a visible-light photo-Arbuzov reaction as an efficient, mild, and metal-free alternative. Rhodamine 6G (Rh.6G) is used as the photocatalyst, generating aryl radicals under blue light. Coupling
External oxidant-free cross-coupling: electrochemically induced aromatic C–H phosphonation of azoles with dialkyl-<i>H</i>-phosphonates under silver catalysis
作者:E. O. Yurko、T. V. Gryaznova、K. V. Kholin、V. V. Khrizanforova、Y. H. Budnikova
DOI:10.1039/c7dt03650g
日期:——
phosphorus precursors and intermediates using cyclic voltammetry, ESR, and NMR spectroscopy were investigated, and a radical process mechanism was proposed. It has been found that AgP(O)(OEt)2 is oxidized earlier than other components of the reaction mixture with the elimination of a radical. The ESR spectrum of this radical's adduct was obtained in the presence of the radical trap PBN. Ag2+ is out of