Synthesis and characterization of 3-pyridylchalcogen compounds
作者:Rajeev Kumar、K.K. Bhasin、Jaspreet S. Dhau、Avtar Singh
DOI:10.1016/j.inoche.2022.109344
日期:2022.5
one-pot synthesis of 3-pyridylchalcogen (Se, Te) compounds, has been developed. Under non-cryogenic conditions, 3,3′-dipyridyl diselenide/ditelluride and other unsymmetrical derivatives were prepared by the reaction of 3-bromopyridine with the isopropyl magnesium chloride (-PrMgCl) followed by the addition of chalcogen (Se/Te) and with variety of electrophiles. The known and unknown compounds were characterized
A multicomponent reaction of isocyanides, ditellurides and manganese(III) carboxylates under mild reaction conditions leads to the synthesis of various N-acyl tellurocarbamates. This method demonstrates good functional tolerance and broad substrate scope and, as a result, is especially suitable for the postfunctionalization of complicated molecules such as drugs. The given method can be further extended
A new protocol for the polyoxomolybdate-based copper-catalyzed synthesis of diselenides and ditellurides from organic iodides and elemental selenium or tellurium with moderate to excellent yields (up to 96%) is developed. The virtue of this transformation is low catalyst loading (0.5 mol%). In addition, gram-scale experiments and the reaction mechanism are studied.
An Efficient One-Pot Synthesis of Symmetrical Diselenides or Ditellurides from Halides with CuO Nanopowder/Se<sup>0</sup> or Te<sup>0</sup>/Base
作者:Devender Singh、Anna M. Deobald、Leandro R. S. Camargo、Greice Tabarelli、Oscar E. D. Rodrigues、Antonio L. Braga
DOI:10.1021/ol100558b
日期:2010.8.6
A CuO nanopowder-catalyzed coupling reaction of aryl, alkyl, and heteroaryl iodides with elemental selenium and tellurium takes place in the presence of KOH at 90 degrees C In DMSO. A wide range of substituted symmetrical diselenides and ditellurides were afforded with good to excellent yields.