Preparation of 4H-Pyrazolo[1, 5-α]indole

4H-Pyrazolo[1, 5-α]indole was prepared by two pathways employing the decarbonylation of 2-formyl-4H-pyrazolo[1, 5-α]indolo and the intramolecular cyclization of 1-(2'-carboethoxyphenyl)pyrazole as key reactions. The latter of approach was found to be more practical than the former one.

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Bibliographische Detailangaben
Veröffentlicht in:	Chemical & pharmaceutical bulletin 1992/09/25, Vol.40(9), pp.2267-2269
Hauptverfasser:	KATAYAMA, Hajime, SAKURADA, Masahiko, HERATH, Wasala H. H., TAKATSU, Noriyuki, SHIEN, Jing-Kang
Format:	Artikel
Sprache:	eng
Schlagworte:	2-cyanomethylindoline 2-formyl-4H-pyrazolo[1, 5-α]indole 4-oxo-4H-pyrazolo[1, 5-α]indole 4H-pyrazolo[1, 5-α]indole Chemistry decarbonylation dehydrogenation Exact sciences and technology fragmentation Heterocyclic compounds Heterocyclic compounds with several n hetero atoms in the same ring, in separated rings or in fused rings hydrogenolysis Organic chemistry preparation Preparations and properties Wilkinson catalyst
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Beschreibung
Zusammenfassung:	4H-Pyrazolo[1, 5-α]indole was prepared by two pathways employing the decarbonylation of 2-formyl-4H-pyrazolo[1, 5-α]indolo and the intramolecular cyclization of 1-(2'-carboethoxyphenyl)pyrazole as key reactions. The latter of approach was found to be more practical than the former one.
ISSN:	0009-2363 1347-5223
DOI:	10.1248/cpb.40.2267