Copper-catalyzed one-pot tandem synthesis of unsymmetrical diaryl chalcogenides from two different aryl iodides
摘要:
Unsymmetrical diaryl chalcogenides were synthesized by a novel one-pot tandem process from two different aryl iodides. A symmetrical diaryl dichalcogenide (ArEEAr, E = Se or Te) was initially obtained by a Cu2O-cataylzed coupling reaction of An with elemental selenium or tellurium in the presence of KOH. Without purification, it was subsequently coupled with a different aryl iodide (Ar'I) to give the unsymmetrical diaryl chalcogenides (ArEAr') in good yields. (C) 2015 Elsevier Ltd. All rights reserved.
CuO nanoparticles: an efficient and recyclable catalyst for cross-coupling reactions of organic diselenides with aryl boronic acids
作者:Diego Alves、Cayane G. Santos、Márcio W. Paixão、Letiére C. Soares、Diego de Souza、Oscar E.D. Rodrigues、Antônio L. Braga
DOI:10.1016/j.tetlet.2009.09.052
日期:2009.12
We present here an efficient and ligand-free cross-coupling reaction of organic diselenides with aryl boronicacids using a catalytic amount of CuO nanoparticles in DMSO at 100 °C under air atmosphere. This is a general cross-coupling reaction and was performed with organic diselenides and aryl boronicacids bearing electron-withdrawing and electron-donating groups affording the corresponding selenides
The X-ray crystallographic analysis of 8-fluoro-1-(p-anisylselanyl)naphthalene (1) revealed that the F and Se atoms and the ipso-carbon of the p-anisyl group (C(An)) aligned linearly. The F atom and the Se-C(An) bond lay on the naphthyl plane: the nonbonded distance between F and Se atoms was 2.753(3) Angstrom and the FSeC(An) angle was 175.0(1)degrees. Ab initio MO calculations with the 6-311++G(3df, 2pd) basis sets performed on the model compound of 1, HF ... SeH(2), where the aryl groups of 1 were replaced by hydrogens. The calculations exhibited that the energy minimum was achieved when the F, Se, and C(An) atoms aligned linearly. Charge transfer in the formation of HF ... SeH(2) was suggested to occur from F to SeH(2) on the basis of natural population analysis, which supported the np(x)(F)-sigma*(Se-C(An)) interaction.
Gujral, Gurjeet; Bhasin, Aman K. K.; Bhasin, Indian Journal of Heterocyclic Chemistry, <hi>2022</hi>, vol. 32, # 2, p. 243 - 250
作者:Gujral, Gurjeet、Bhasin, Aman K. K.、Bhasin、Chauhan, Nitu、Rani, Ritu、Gulati, Shivani