Synthesis of a Novel Hexa Cyclic Benzimidazo[1,2-c]indazolo-[2,3-a]quinazoline
Two alternate synthetic routes are described for the synthesis of the hitherto unknown benzimidazo[1,2-c]indazolo[2,3-a]quinazoline (3). While dehydrative cyclisation of 2-[2-(2-azidobenzoylamino)-phenyl]benzimidazole (2) in polyphosphate ester gave 3 in low yield, very good yields were obtained in...
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Veröffentlicht in: | Synthetic communications 1991-01, Vol.21 (1), p.49-61 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | Two alternate synthetic routes are described for the synthesis of the hitherto unknown benzimidazo[1,2-c]indazolo[2,3-a]quinazoline (3). While dehydrative cyclisation of 2-[2-(2-azidobenzoylamino)-phenyl]benzimidazole (2) in polyphosphate ester gave 3 in low yield, very good yields were obtained in triethyl phosphite reductive cyclisation of 6-(2-nitrophenyl)benzimidazo[1,2-c]quinazolines (8). |
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ISSN: | 0039-7911 1532-2432 |
DOI: | 10.1080/00397919108020789 |