Substituted chromenos, dihydropyridines and pyridines have been important in the syntheses of compounds having interesting pharmacological properties. Therefore, we found of interest to synthesize chromenopyridines and chromenodihydropyridines (i.e., fused chromeno and dihydropyridine or pyridine rings) to further study their biological activity. Here, we propose one-pot syntheses for substituted ethyl-2,4-dime...
The enantioselective hydrogenation of ethyl pyruvate and 1-phenyl-1,2-propanedione was studied at 298 K and 40 bar of H2 over colloidal Pt stabilized with cinchonidine (CD) and supported on silica. The catalysts were prepared by impregnation of colloidal Pt on SiO2, leading to a metal load close to 1 wt.%. The colloid was prepared from an aqueous solution of H2PtCl6 and stabilized with different quantities of C...
O tratamento multidisciplinar da espinha bífida resultou num considerável aumento do número de doentes a atingirem a idade adulta. A vida sexual de um doente com espinha bífida está afectada não só pelas limitações físicas inerentes à doença, mas também pelos impactos psicológico e social desta doença. Trata-se de um tema de proporções pouco conhecidas, particularmente na população portuguesa de doentes com ...
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