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Title: | Reaction of 3-phenyl-3-aminoquinoline-2,4-diones with isothiocyanates. Facile access to novel spiro-linked 2-thioxoimidazolidine-oxindoles and imidazoline-2-thiones | ||||||||||
Author: | Klásek, Antonín; Lyčka, Antonín; Mikšík, I.; Růžička, A. | ||||||||||
Document type: | Peer-reviewed article (English) | ||||||||||
Source document: | Tetrahedron. 2010, vol. 66, issue 11, p. 2015-2025 | ||||||||||
ISSN: | 0040-4020 (Sherpa/RoMEO, JCR) | ||||||||||
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DOI: | https://doi.org/10.1016/j.tet.2010.01.041 | ||||||||||
Abstract: | 3-Phenyl-3-amino-1H,3H-quinoline-2,4-diones (1) react with alkyl or aryl isothiocyanates to give novel 9b-hydroxy-3a-phenyl-1,2,3,3a-tetrahydro-2-thioxo-5H-imidazo[4,5-c]quinolin-4(9bH)-ones in high yields. These compounds rearrange in boiling acetic acid or concentrated hydrochloric acid to give novel 5-phenyl-2-thioxospiro[4H-imidazol-4,3´-[3H]indol]-2´(1´H,3H)-ones, 5-hydroxy-5-phenyl-2-thioxospiro[imidazolidine-4,3´-[3H]indol]-2´-ones, and (2-methylaminophenyl)-5-phenyl-1H-imidazole-2(3H)-thiones. All compounds were characterized by their 1H, 13C, IR and MS data, and in some cases also by 15N NMR data. The structures and compositions of four compounds were confirmed by single crystal X-ray diffraction. | ||||||||||
Full text: | https://www.sciencedirect.com/science/article/pii/S0040402010000736 | ||||||||||
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