43067-41-0Relevant academic research and scientific papers
Formation of BN Isosteres of Azo Dyes by Ring Expansion of Boroles with Azides
Braunschweig, Holger,Celik, Mehmet Ali,Hupp, Florian,Krummenacher, Ivo,Mail?nder, Lisa
, p. 6347 - 6351 (2015)
Herein, we present the results of our investigations on the effect of ortho substitution of aryl azides on the ring-expansion reaction of boroles, five-membered unsaturated boron heterocycles. These studies led to the isolation of the first 1,2-azaborinin
Anomalous Staudinger reaction at intramolecular frustrated P-B Lewis pair frameworks
Stute, Annika,Heletta, Lukas,Froehlich, Roland,Daniliuc, Constantin G.,Kehr, Gerald,Erker, Gerhard
supporting information, p. 11739 - 11741 (2013/01/15)
The FLP-mesityl azide addition products 5, formed by FLP-addition to the terminal azide nitrogen atom, undergo N-N bond cleavage in an unusual variant of the Staudinger reaction upon thermolysis or photolysis to give an internally borane stabilized [P]NH
Behaviour of Arylazo tert-Butyl Sulfides with Ketone Enolates. Competition between SRN1 α-Arylation and Azocoupling Reactions.
Dell'Erba, Carlo,Novi, Marino,Petrillo, Giovanni,Tavani, Cinzia
, p. 325 - 334 (2007/10/02)
(Z)-Arylazo tert-butyl sulfides 1a-i react, in DMSO and at room temperature, with potassium acetone enolate to give good yields of 1-aryl-2-propanones via spontaneous SRN1 dark reactions. α-Phenylation of pincolone and acetophenone enolates by 1a likewise occurs in excellent yields.In agreement with the involvement of an electron-transfer catalyzed chain process, the reaction of the 4-bromo derivative 1n with pinacolone enolate gives mainly the bis-substitution product 13.With azosulfides 1j-m the arylation pathway competes with a base-induced thiol elimination eventually leading, depending on the structure of the azosulfide, to indazoles 8 or 11 and/or to 2-oxopropanal arylhydrazones 9, 10 or 12.
Dediazoniation of Arenediazonium Ions. Part XIX. Effect of Thiocyanate Ion in the Reactions of 2,4,6-Trimethylbenzenediazonium Tetrafluoroborate in 2,2,2-trifluoroethanol
Szele, Ivanka,Zollinger, Heinrich,Deshpande, Ashok D.
, p. 2721 - 2727 (2007/10/02)
The dediazoniation of 2,4,6-trimethylbenzenediazonium tetrafluoroborate (1) in 2,2,2-trifluoroethanol (TFE) was studied in the presence of potassium thiocyanate.The effect of added salt on the dediazoniation rate, the Nα-Nβ rearrangement (Eqn. 2), the exchange of the 15N-labelled diazo group with molecular nitrogen (Eqn. 3), and the reaction products was determinated.With 0.3M KSCN a dediazoniation-rate increase of 16.5percent was achieved, and the amounts of rearranged and exchanged product were reduced to 88percent and 70percent, respectively, of the values found in pure TFE.The dediazoniation products formed are ArF (3), ArOCH2CF3 (4), ArSCN (5), ArNCS (6) and traces of 5,7-dimethylindazole (7).All the data are in agreement with, and support the previously proposed mechanism (Eqn. 1) of heterolytic dediazoniation of arenediazonium salts.
