EFFICIENT SYNTHESIS OF NEW NITROGEN DONOR CONTAINING TRIPODS UNDER MICROWAVE IRRADIATION AND WITHOUT SOLVENT
作者:Rachid Touzani、Abdelkrim Ramdani、Taibi Ben-Hadda、Sghir El Kadiri、Olivier Maury、Hubert Le Bozec、Pierre H. Dixneuf
DOI:10.1081/scc-100104040
日期:2001.1
Five new N,N-bis(pyrazole-1-yl-methyl) alkylamines have been prepared in onestep by condensation of two equivalents of 1-(hydroxymethyl)-3,5-disubstituted pyrazoles with a series of primary amines. This reaction is carried out undermicrowaveirradiation (60 W) in the absence of solvent for 20 m and affords high yields (75–90%) of mixed nitrogen donor tripodal molecules.
Synthesis and enzyme inhibitory activities of some new pyrazole-based heterocyclic compounds
作者:Tariq Harit、Fouad Malek、Brahim El Bali、Ajmal Khan、Kourosh Dalvandi、Bishnu P. Marasini、Shagufta Noreen、Rizwana Malik、Sadia Khan、M. Iqbal Choudhary
DOI:10.1007/s00044-011-9804-0
日期:2012.10
Three tridentate N,N-bis(3,5-dimethylpyrazol-1-ylmethyl)-1-hydroxy-2-aminoethane (2), N,N-bis(3,5-dimethylpyrazol-1-ylmethyl)-cyclohexylamine (3) and 2-[bis(1,5-dimethyl-1H-pyrazol-3-ylmethyl)amino]ethan-1-ol (4) are synthesized and spectroscopically characterized together with 1-hydroxymethyl-3,5-dimethylpyrazole (1). These have been tested in inhibitory activities against various hyperactive enzymes like urease, beta-glucuronidase, phosphodiesterase, alpha-chymotrypsin, acetylcholinesterase and butyrylcholinesterase. Compounds 1, 2 and 3 were found to be selective inhibitors of urease. Compound 4 was found to be selective inhibitor of butyrylcholinesterase. The nature of the junction between pyrazoles cycles determined the activities of these tripods. While the tripods are inactive towards urease or glucuronidase, they turn to be selective towards butyrylcholinesterase.