Oxokohlenstoffe und verwandte Verbindungen, 31 [1]. 3-Antipyryl-4-hydroxy-cyclobutendion (Antipyrylsemiquadratsäure) und seine Derivate / Oxocarbons and Related Compounds, 31 [1]. 3-Antipyryl-4-hydroxy-cyclobutenedione (Antipyrylsemisquaric Acid) and its Derivatives

Antipyrylsemisquaric chloride (9) has been prepared with excellent yield from antipyrylsemisquaric acid (8) and oxalic dichloride in the presence of dimethylformamide. Reaction of 9 with N and S nucleophiles afforded antipyrylsemisquaric acid derivatives, such as amides 12a - t, 14a - e, 15, hydrazi...

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Veröffentlicht in:	Zeitschrift für Naturforschung. B, A journal of chemical sciences A journal of chemical sciences, 2008-01, Vol.63 (1), p.55-64
Hauptverfasser:	Schmidt, Arthur H., Kohler, Jochen, Pretsch, Ramona, Freytag-Loringhoven, Sarah von, Wiesert, Peter R.
Format:	Artikel
Sprache:	eng
Schlagworte:	2,3- Dimethyl-1-phenyl-3-pyrazolin-5-one Antipyrine Antipyrylsemisquaric Chloride Keywords Cyclobutenediones Semisquaric Acid Derivatives
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Beschreibung
Zusammenfassung:	Antipyrylsemisquaric chloride (9) has been prepared with excellent yield from antipyrylsemisquaric acid (8) and oxalic dichloride in the presence of dimethylformamide. Reaction of 9 with N and S nucleophiles afforded antipyrylsemisquaric acid derivatives, such as amides 12a - t, 14a - e, 15, hydrazides 18a - e, and thioesters 21a - i.
ISSN:	0932-0776 1865-7117
DOI:	10.1515/znb-2008-0108