Encontrados 3 documentos, a visualizar página 1 de 1
Ultrasound assisted remote functionalization of non-activated carbon atoms: eff...
Costa, Saul C. P.; Moreno, M. J. S. Miranda; Melo, M. Luísa Sá e; Neves, André S. CamposUltrasonic irradiation of bromohydrins in the presence of (diacetoxyiodo)benzene and I2 generates alkoxyl radicals which lead in situ to intramolecular hydrogen abstraction on the C-19 non-activated carbon atoms in steroids producing tetrahydrofurans selectively in very good yields. Photolysis was less effective in promoting such conversions. ; http://www.sciencedirect.com/science/article/B6THS-3YF4638-1R/1/...
Improved syntheses of aromatase inhibitors and neuroactive steroids efficient o...
Neves, André S. Campos; Melo, Maria Luisa Sá e; Moreno, Maria José S. M.; Silva, Elisiário J. Tavares da; Salvador, Jorge A. R.; Costa, Saul P. daAn Henbest reduction, followed by the preparation of a silyl enol ether and oxidation in situ with m-CPBA has led to the neurosteroids 3[alpha]-hydroxy- and 3[alpha],21-dihydroxy-5[alpha]-pregnanolones. Using testosterone as starting material, a new short synthesis of an aromatase inhibitor, 4-OHA, has been achieved through hydroboration/oxidation followed by a Swern type oxidation and epimerization. Another ar...
Preparation and Electrooxidative SO-Extrusion of Halogenated 7-Thiabicyclo[2.2....
Thiemann, Thies; Melo, M. Luísa Sá e; Neves, André S. Campos; Li, Yuanqiang; Mataka, Shuntaro; Tashiro, Masashi; Geißler, Uwe; Walton, DavidHalogenated thiophenes have been cycloadded oxidatively to maleimides to give halogenated thiabicyclo[2.2.1]heptene S-oxides which have been subjected to an electrochemical extrusion of SO to give various halogeno-substituted phthalimides. ; http://dx.doi.org/10.1039/a707882j
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||