SYNTHESE ET HETEROCYCLISATION DES (PYRAZOLYL-3(5))-2 BENZIMIDAZOLES EN CATALYSE PAR TRANSFERT DE PHASE
Fusion of o-diamines with pyrazolylhydrazines 2a-2b gives the new 2-pyrazolylbenzimidazoles 3a-3l.The application of phase transfer catalysis to the N-alkylation of compounds 3a-3d leads to pyrazines 4a-4d and diazepines 5a-5d.
Essassi, E.M.,Fifani, J.
p. 63 - 68
(2007/10/02)
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