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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Uso de microondas na síntese de 3-alquil(aril)-5-hidróxi-5-triclorometil-4,5-diidro-1h-pirazol-1-carboxiamida / Microwave assisted synthesis of 3-alquil(aril)-5-hydroxy-5-trichloromethyl-4,5-dihydro-1 h-pirazole-1-carboxiamide

Muraro, Paulo Isaias Rossato 01 March 2005 (has links)
A series of 3-alkyl and 3-aryl-5-hydroxy-5-trichloromethyl-4,5-dihydro-1Hpirazoles-1-carboxiamide that possess biological activity they were synthesized, in good yeld, through the cyclocondensation, in microwaves, of 4-alcoxi-1,1,1-trihalometyl-3alquen-2-onas with semicarbazyde chloride using MeOH/H2O as solvent. The advantage obtained with the use of irradiation of microwaves in relation to the classic methodology it is the decrease of the time reacional and revenue increase as it will be demonstrated. / Uma série de 3-alquil(aril) 5-hidroxi 5-triclorometil-4,5-diidropirazol-1-carboxiamida, que possuem atividade biológica foram sintetizadas, em bons rendimentos, através da ciclocondensação, em microondas, de 4-alcoxi-1,1,1-trialometil-3-alquen-2-onas com cloreto de semicarbazida e MeOH/H2O como solvente. A vantagem obtida com o uso de irradiação de microondas em relação à metodologia clássica é a diminuição do tempo reacional e aumento de rendimento como será demonstrado.

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