Synthesis and some reactions of 2-(2-aminoanilino)cyclohepta[b]pyrroles : leading to 5H-cyclohepal[1',2']pyrrolo[2,3-b]benzodiazepine, a novel 20π antiaromatic system, and cycloheptal[1',2' : 4,5]-pyrrolo[1,2-a]benzimidazoles
In: Bulletin of the Chemical Society of Japan, Jg. 63 (1990), Heft 6, S. 1617-1622
academicJournal
- print, 18 ref
Zugriff:
2-Chlorocyclohepta[b]pyrroles reacted with o-phenylenediamine to give 2-(2-aminoalinino)cyclohepta-[b]pyrroles (2a,b) in good yields. Treatment of 2a and 2b with polyphosphoric acid afforded cyclohepta[1',2':4,5]pyrrolo[1,2-a]benzimidazole (4a) in good yields. Treatment of 2b with acids gave 6-(ethoxycarbonyl) derivatives (4b) of 4a and 12H-5,13-dihydrocyclohepta[1',2':4,5]pyrrolo[2,3-b][1,5]benzodiazepin-12-one (5). Compound 5 was methylated with methyl iodide in the presence of DBU to give 5H-12-methoxycyclohepta-[1',2':4,5]pyrrolo[2,3-b][1,5]benzodiazepine, a novel 20 π antiaromatic system.
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Synthesis and some reactions of 2-(2-aminoanilino)cyclohepta[b]pyrroles : leading to 5H-cyclohepal[1',2']pyrrolo[2,3-b]benzodiazepine, a novel 20π antiaromatic system, and cycloheptal[1',2' : 4,5]-pyrrolo[1,2-a]benzimidazoles
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Autor/in / Beteiligte Person: | ABE, N ; ISHIKAWA, N ; HAYASHI, T ; MIURA, Y |
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Zeitschrift: | Bulletin of the Chemical Society of Japan, Jg. 63 (1990), Heft 6, S. 1617-1622 |
Veröffentlichung: | Tokyo: Chemical Society of Japan, 1990 |
Medientyp: | academicJournal |
Umfang: | print, 18 ref |
ISSN: | 0009-2673 (print) |
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