A Novel Synthesis of Some Naphtho[2,3-d]Thiazole-4,9-Diones From Lawsone

A Novel Synthesis of Some Naphtho[2,3-d]Thiazole-4,9-Diones From Lawsone

A series of naphtho[2,3-d]thiazole-4,9-diones (IV) have been prepared by the condensation of bromolawsone (II) with thiosemicarbazones derived from aldehydes and ketones in dry DMF. The products (V) are also obtained by the cyclization of the intermediate 2-chlorobenzaldehyde thiosemicarbazone of 1,...

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Veröffentlicht in:Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 1994-07, Vol.92 (1-4), p.51-56
Hauptverfasser: Brahmeshwari, G., Rao, V. Rajeswar, Kumari, T. Surya, Padmanabha Rao, T. V.
Format: Artikel
Sprache:eng
Schlagworte:
2,3-dichloronaphthoquinone and naphthothiazoles
Bromolawsone
thiazole
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Zusammenfassung:A series of naphtho[2,3-d]thiazole-4,9-diones (IV) have been prepared by the condensation of bromolawsone (II) with thiosemicarbazones derived from aldehydes and ketones in dry DMF. The products (V) are also obtained by the cyclization of the intermediate 2-chlorobenzaldehyde thiosemicarbazone of 1,4-naphthoquinone (IV) in ethanol containing KHCO 3 obtained from 2,3-dichloronaphthoquinone.
ISSN:1042-6507
1563-5325
DOI:10.1080/10426509408021457