831-84-5Relevant academic research and scientific papers
Basic alumina as an efficient catalyst for preparation of semicarbazones in solvent free conditions
Kiasat, Ali Reza,Kazemi, Foad,Mehrjardi, Mehdi Fallah
, p. 1337 - 1339 (2008/03/13)
An efficient and simple procedure for conversion of different classes of aldehydes and ketones into the corresponding semicarbazones with semicarbazide hydrochloride using basic alumina is studied.
Vilsmeier formylation of hydrazones and semicarbazones derived from alkyl, benzyl, and cycloalkyl methyl ketones
Lebedev,Lebedeva,Sheludyakov,Kovaleva,Ustinova,Kozhevnikov
, p. 412 - 416 (2007/10/03)
Formylation of ten accessible phenylhydrazones and semicarbazones derived from alkyl, benzyl, and cycloalkyl methyl ketones with the complex of POCl 3 with dimethylformamide was studied. Depending on the electronic and steric structure of the substrates, the reaction yields 1-phenyl- or 1-unsubstituted 3,4-dialkyl-, 3-alkyl-4-aryl-, or 3-alkyl-4-formylpyrazoles. These compounds can be readily oxidized into the corresponding carboxylic acids. 2005 Pleiades Publishing, Inc.
Reactions of diazoalkanes with isocyanates. Synthesis of imidazolidine-2,4-diones, oxindoles, and oxazolidinones
Fulton, Janet B.,Warkentin, John
, p. 1177 - 1184 (2007/10/02)
Thermolysis of a 5,5-dialkyl-Δ3-1,3,4-oxadiazolin-2-one in nitrobenzene containing an aryl isocyanate at 150 deg C affords a 1,3-diaryl-5,5-dialkyl imidazolidine-2,4-dione, an N-arylcarbamoyl-3,3-dialkyloxindole, and a 3-aryl-2-arylimino-5,5-dialkyl-1,3-oxazolidin-4-one.Those products arise from attack of a diazoalkane, generated in situ from the oxadiazolinone by thermal cycloreversion, on the isocyanate function.Two imidazolidine diones, three oxazolidinones, and 14 oxindoles were prepared.
