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- W2952303670 abstract "The novel heterocyclic pyrimidopyrazolopyrimidine system was synthesised through cyclisation of 4-hydrazinyl-2,6-bis(methylthio)pyrimidine-5-carbonitrile with acetylacetone in high yield. Also, two other tetracyclic systems were synthesised through cyclisation of 4-hydrazinyl-6,8-dimethyl-2-(methylsulfanyl)pyrimido[4′,5′:3,4]pyrazolo[1,5- a]pyrimidine with triethyl orthoformate and sodium nitrite to obtain the pyrimidopyrazolotriazolo pyrimidine and pyrimidopyrazolotetrazolopyrimidine respectively." @default.
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- W2952303670 date "2014-11-01" @default.
- W2952303670 modified "2023-10-07" @default.
- W2952303670 title "Synthesis of Novel Heterocycle Systems: 6,8-Dimethyl-2-(Methylsulfanyl)-4-Amino-Substituted Pyrimido[4′,5′:3,4]Pyrazolo[1,5-<i>a</i>]Pyrimidine and 9,11-Dimethyl-5-(Methylsulfanyl)Pyrimido[2′,1′:5,1]Pyrazolo[4,3-<i>e</i>][1,2,4] Triazolo[4,3-<i>c</i>]Pyrimidine" @default.
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- W2952303670 doi "https://doi.org/10.3184/174751914x14117992793459" @default.
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