79246-64-3Relevant academic research and scientific papers
Photocatalytic intermolecular carboarylation of alkenes by selective C-O bond cleavage of diarylethers
Ji, Meishan,Chang, Chenyang,Wu, Xinxin,Zhu, Chen
, p. 9240 - 9243 (2021/09/20)
Disclosed herein is a novel radical-mediated intermolecular carboarylation of alkenes by cleaving inert C-O bonds. The strategically designed arylbenzothiazolylether diazonium salts are harnessed as dual-function reagents. A vast array of alkenes are proven to be suitable substrates. The benzothiazolyl moiety in the products serves as the formyl precursor, and the OH residue provides the cross-coupling site for further product elaboration, indicating the robust transformability of the products.
Palladium-catalyzed direct benzylation of azoles with benzyl carbonates
Mukai, Tomoya,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
supporting information; experimental part, p. 1360 - 1363 (2010/05/19)
"Chemical Equation Presented" The direct aromatic sp2 C-H benzylation of azole compounds with benzyl carbonates proceeds efficiently in the presence of a Pd2(dba)3/dppp catalyst system and KaOAc as a base to afford the corresponding diarylmethanes in good yields. In addition, the same palladium catalyst enables the direct benzylic sp3 C-H benzylation with the second benzyl carbonates without employing any external base.
Multifunctional Photoadditions of Stilbene to Derivatives of Caffeine and Benzothiazole
Kaupp, Gerd,Ringer, Ernst
, p. 1525 - 1539 (2007/10/02)
Electronically excited stilbene (1*) is trapped by 8-substituted caffeine derivatives (2a-f) or 2-chloro- (14) and 2-aminobenzothiazole (21) with variable results.While the electron-rich systems (2c,d) produce mostly propellanes, the halogeno compounds 2a,b and 14 react predominantly via insertion into the C-halogen bond.With 14 there occurs also some C-S insertion, with 21 only N-H insertion.Numerous succeeding reactions are elucidated and the reaction mechanisms discussed.Stilbene (1) photoadds hydrogen chloride to yield 16.
Thermal -Elimination of Methanethiol from a 1,5-Benzothiazepine Derivative
Kaupp, Gerd
, p. 1643 - 1646 (2007/10/02)
Upon heating to 200 deg C, the 1,5-benzothiazepine derivative 1 eliminates methanethiol to form the benzothiazole derivative 2, but not the 1,5-benzothiazepine 5.The structure of 2 is established by independent synthesis from 3, photolysis to give 4, and spectroscopic data.The reaction of 1 to give 2 and methanethiol is termed a -elimination.
Known and New Types of Reactions in the Photoreaction of Stilbenes with Cyclic Imines
Kaupp, Gerd,Grueter, Heinz-Willi
, p. 2844 - 2858 (2007/10/02)
The photoreactions of stilbene and 1,4-diphenyl-1,3-butadiene with caffeine and of stilbene with benzothiazole, 1-methylimidazole and 2-(methylthio)benzothiazole have been investigated with respect to know (- , -cycloaddition , inserting -addition ), mechanistically new (uncatalyzed, substitutive -addition ) and principally new reaction types (substitutive -addition with substituent migration and cleavage of a double bond , substitutive -addition with cleavage of a double bond , intermolecular exchange of vinyl substituents ).The products are isolated and characterized analytically, spectroscopically (UV, 1H, 13C NMR) and by chemical transformations .The new reaction types are without precedence.They are formulated to occur via 1,4-diradicals.
