Ligand-Promoted C(sp3)−H Olefination en Route to Multi-functionalized Pyrazoles
نویسندگان
چکیده
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Silica supported phosphorus pentoxide (P2O5·SiO2) is an efficient catalyst for synthesis of 1,3,5-substituted pyrazoles via the condensation of 1,3-diketones and hydrazines. Simplicity of procedure, mild condition, being solvent-free, high yields, and easy workup are some advantages of this protocol.
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The peroxide initiated radical addition of dithiocarbonates (xanthates) to trialkoxy vinylsilanes leads to functionalized trialkoxysilanes. Prior addition of the dithiocarbonates to an alkene before reaction with the vinylsilane can be used to increase the complexity of the final product.
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ژورنال
عنوان ژورنال: Chemistry - A European Journal
سال: 2016
ISSN: 0947-6539
DOI: 10.1002/chem.201600704