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- [5] Hypervalent iodine in synthesis:: A novel two-step procedure for the synthesis of new derivatives of 1H-imidazo[1,2-b]-pyrazole by the cyclocondensation between 5-amino-4-cyano-3-phenyl-1H-pyrazole and α-tosyloxyacetophenones or α-haloacetophenones SYNTHETIC COMMUNICATIONS, 2005, 35 (04) : 493 - 501