Vilsmeier Formylation of Hydrazones and Semicarbazones Derived from Alkyl, Benzyl, and Cycloalkyl Methyl Ketones
作者:A. V. Lebedev、A. B. Lebedeva、V. D. Sheludyakov、E. A. Kovaleva、O. L. Ustinova、I. B. Kozhevnikov
DOI:10.1007/s11176-005-0241-y
日期:2005.3
Formylation of ten accessible phenylhydrazones and semicarbazones derived from alkyl, benzyl, and cycloalkyl methyl ketones with the complex of POCl3 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
1,2,3-Selenadiazole-driven single family MSNCs of CdSe
作者:Aditi A. Jadhav、Pawan K. Khanna
DOI:10.1039/c7nj02994b
日期:——
of CdSe magic sized nanoclusters (MSNCs) in the size range of below 2 nm. The current work describes use of different 1,2,3-selenadiazole derivatives viz. small chain aliphatic, long chain aliphatic, acetophenone and aromatic derivatives for preparation of CdSe MSNCs. The study has been carried out to check the effect of different functionality of the precursor in the formation of MSNCs of CdSe. The
作者:Pier Giovanni Baraldi、Barbara Cacciari、Giampiero Spalluto、Romeo Romagnoli、Giovanni Braccioli、Zaid、Maria J. Pineda de las Infantas
DOI:10.1055/s-1997-1328
日期:1997.10
Stobbe condensation of 3-alkyl- or aryl-4-formylpyrazoles 3a-f with diethyl succinate in the presence of potassium t-butoxide, followed by intramolecular ring closure (Ac2O-NaOAc), afforded the corresponding indazole derivatives 5a-f in 65-85% overall yield. These compounds are good starting materials for transformation to biologically active molecules, such as new pyrazole analogs of the left-hand segment of the potent natural antineoplastic agent CC-1065.