Add time:09/09/2019 Source:sciencedirect.com
Several new 2,4-disubstituted pyrrolo[2,1-f][1,2,4]triazines and pyrazolo[5,1-c]-pyrimido[4,5-e][1,2,4]triazines are easily obtained from the reaction of N, N-dimethyldichloromethyleniminium chloride with 1-aminopyrrole-2-carbonitrile 1 and ethyl 4-amino-3-cyanopyrazolo[5,1-c][1,2,4]triazine-8-carboxylate6, respectively.
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