2-Imidazolines. IV . 1-Aryl-2-alkylthio-4,5- diamino-4,5-dihydroimidazoles. Synthesis and properties |
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| Authors: | Stefania Meola Elisabetta Rivera Riccardo Stradi Bruno Gioia |
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| Abstract: | 1,2-Diimmonium salts ( 1 ) react with S-substituted isothioureas ( 3 ) yielding 2-alkylthio-4,5-diamino-4,5-dihydroimidazoles ( 4 ), which under mild pyrolytic conditions afforded 2-alkylthio-5-aminoimidazoles ( 7 ). Imidazolines ( 4 ) and imidazoles ( 7 ) were easily desulfurated with Raney nickel affording 4,5-diamino-4,5-dihydroimidazole ( 9 ) and 5-aminoimidazole ( 10 ), respectively. |
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