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ChemInform Abstract: Electrophilic Aromatic Substitution of 3-Alkoxy-6-alkyl-2-cyano-4,5,6a,11-tetraazabenzo[a]fluorene with Orthoesters.

✍ Scribed by Yoshihisa Okamoto; Yoshimi Yamaguchi; Yoshihisa Kurasawa; Mitsuaki Maeda

Publisher: John Wiley and Sons
Year: 2008
Weight: 27 KB
Volume: 39
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.200839152

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## Abstract magnified image Fused tetracycles, 6‐alkyl‐3‐alkoxy‐2‐cyano‐4,5,6a,11‐tetraazabenzo[__a__]fluorene derivatives (**5a**,**b**,**c**,**d**,**e**,**f**), are synthesized from 2‐alkoxy‐5‐(benzimidazol‐2‐ylidene)‐3‐cyano‐6‐imino‐5,6‐dihydro‐pyridines (**4b**,**c**), and when refluxed in eth

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Synthesis and Dimroth Rearrangement of 6-Cyano-1,2,4-triazolo[4,3a]pyrimidin-5-and 7-ones. A Novel Alkylation with Orthoesters and a New Participation of the Cyano Group in the Rearrangement. -Formic acid and triethyl orthoformate react with 2-hydrazinopyrimidin-4-ones (I) and (VI) to furnish triazo

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ChemInform Abstract: Fused Quinoline Heterocycles. Part 2. First Synthesis of 1,2,3,4,5,6-Hexaazaaceanthrylenes and 5,7,8,10a,11-Pentaazabenzo[a]fluorenes.

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