Unusual dihydrazone formation in the fis
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Aleem Gangjee; Lihua Chen
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Article
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1999
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Journal of Heterocyclic Chemistry
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English
β 323 KB
## Abstract The synthesis of seven novel tetracyclic 2,4βdiaminopyrrolo[2,3β__d__]pyrimidines as conformationally restricted nonclassical antifolates was achieved __via__ an unusual Fischerβindole cyclization of dihydrazones. An attempted synthesis of 2,4βdiaminoβ6βhydrazinopyrimidine afforded 2βam