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Isothiazoles. part X: New 3-substituted-2-arylpropenamidines by base catalyzed ring opening of 3-amino-4-arylisothiazole 1,1-dioxides

✍ Scribed by Egle M. Beccalli; Francesca Clerici; Maria Luisa Gelmi

Book ID: 104209769
Publisher: Elsevier Science
Year: 1999
Tongue: French
Weight: 774 KB
Volume: 55
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(99)00954-0

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✦ Synopsis

Starting fiom 5-unsubstituted or 5-alkyl-, aryl-, beteroarylsubstituted 3-diethylamino-4arylisothiazole 1 ,I-dioxides by base induced ring opening 3-alkoxypropenamidines were synthesized in excellent yields in a mild and effcient way. When 5-bromo-3-diethylamino-4~arylisothiazole

1,1dioxide was used as the reagent, 3,3-dialkoxy-propenamidines, a new class of unsaturated amidines, were obtained. By using Grignard reagents 3-substituted acrylamidines can be produced.

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