Boosting the Catalytic Performance of Metal-Organic Frameworks for Steroid Transformations by Confinement within a Mesoporous Scaffold
作者:Francisco G. Cirujano、Ignacio Luz、Mustapha Soukri、Cedric Van Goethem、Ivo F. J. Vankelecom、Marty Lail、Dirk E. De Vos
DOI:10.1002/anie.201706721
日期:2017.10.16
crystallization achieves selective confinement of metal–organicframework (MOF) nanocrystals within mesoporous materials, thereby rendering active sites more accessible compared to the bulk‐MOF and enhancing the chemical and mechanical stability of MOF nanocrystals. (Zr)UiO‐66(NH2)/SiO2 hybrid materials were tested as efficient and reusable heterogeneous catalysts for the synthesis of steroid derivatives,
Synthesis of steroidal derivatives containing substituted, fused and spiro pyrazolines
作者:Anabel Romero-López、Sara Montiel-Smith、Socorro Meza-Reyes、Penélope Merino-Montiel、José Luis Vega-Baez
DOI:10.1016/j.steroids.2014.05.013
日期:2014.9
through a cycloaddition reaction of different α,β-unsaturatedketones with hydrazine acetate in acetic acid is reported. Depending on the starting material, the ringclosurereaction provided a mixture of two steroidal pyrazoline epimers that were separated and studied by NMR techniques. In one case it was possible to isolate and characterize the hydrazone derivative as the reaction intermediate, which
Synthesis of monomeric and dimeric steroids containing [1,2,4]triazolo[1,5-a]pyrimidines
作者:Ailed Arenas-González、Luis Antonio Mendez-Delgado、Penélope Merino-Montiel、José M. Padrón、Sara Montiel-Smith、José Luis Vega-Báez、Socorro Meza- Reyes
DOI:10.1016/j.steroids.2016.09.014
日期:2016.12
The synthesis of several monomeric and dimeric steroidal [1,2,4]triazolo[1,5-a]pyrimidines (TPs) derived from steroids are described. These derivatives were prepared from α,β-unsaturated carbonyl compounds through a Claisen Schmidt condensation and rearrangement of the spiro moiety followed by a cycloaddition with 3-amino-1,2,4-triazole. The antiproliferative activity of compounds 7, 13-15 was tested
Abstract A facile synthesis of novel dispiro oxindole-pyrrolothiazole-androsterone hybrid heterocycles has been achieved through 1,3-dipolarcycloaddition. The reaction proceeds stereo- and regioselectively, affording a single isomer of the product in excellent yields with the formation of two C–C and one C–N bonds and creation of four new contiguous stereocenters in one step. GRAPHICAL ABSTRACT