Aminopyrazolo1, 5-apyrimidines 13 and not the regioisomeric compounds 14.Structures of pyrazolo1, 5-apyrimidines, imidazo1, 2apyrimidines, and pyrimido1, 2-abenzimidazoles, a c, respectively. Helvetica Chimica Acta Vol.triazolo1, 5-c pyrimidine moiety were reported to exhibit remarkable. Also, the tricyclic heterocyclic pyrazolo1, 5-c-1, 2, 4-triazolo4, 3-epyrimidines 2. nzic.org.nzChemProcesse...

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the synthesis of smcl3(thf)3 from smcl3.6h2o is described. the reaction of smcl3(thf)3 with nabh4 in dry thf gave white microcrystalline tris (tetrahydroborato) tris (tetrahydrofuran) samarium (iii), sm(bh4)3(thf)3. the vibrational and magnetic properties of sm(bh4)3(thf)3 have been studied.

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an efficient synthesis of some novel coumarin derivatives via 1, 4- michael addition of indole to coumarin chalcones catalyzed by cellulose sulphonic acid (csa) under solvent free conditions is described. the corresponding michael addition products were obtained in good to excellent yield. the synthesized compounds were screened for their antibacterial activity against e. coli, s. aureus and an...