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Synthesis 2017; 49(16): 3720-3725
DOI: 10.1055/s-0036-1588179
DOI: 10.1055/s-0036-1588179
paper
Eschenmoser Coupling Reaction and Reactivity of Hydrazinecarbothioamides in the Synthesis of Benzindazole and Naphthothiazole Derivatives
Further Information
Publication History
Received: 07 March 2017
Accepted after revision: 25 April 2017
Publication Date:
24 May 2017 (online)


Abstract
N-Unsubstituted and N-substituted 2-phenylhydrazinecarbothioamides react with 2,3-dichloro-1,4-naphthoquinone to give a series of unprecedented 3-amino- and 3-(alkylamino)-1-phenyl-1H-benzo[f]indazole-4,9-diones in good yields. On the other hand, the reaction of N-substituted 2-tosylhydrazinecarbothioamides with 2,3-dichloro-1,4-naphthoquinone afforded (Z)-N-[3-(tosylamino)-4,9-dioxo-4,9-dihydronaphtho[2,3-d]thiazol-2(3H)-ylidene]-substituted aminium chlorides and (Z)-N-[(2-substituted imino)-4,9-dioxo-4,9-dihydronaphtho[2,3-d]thiazol-3(2H)-yl]-4-toluenesulfonamide hydrates.
Key words
hydrazinecarbothioamides - 2,3-dichloro-1,4-naphthoquinone - benzo[f]indazole-4,9-diones - naphtho[2,3-d]thiazoles - Eschenmoser reactionSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0036-1588179.
- Supporting Information
- CIF File