A. Klásek, Vladimír Mrkvička, A. Lyčka
Jun 20, 2009
Citations
0
Influential Citations
17
Citations
Journal
Tetrahedron
Abstract
Abstract 3-Butyl-3-amino-1 H ,3 H -quinoline-2,4-diones react with isothiocyanates to give novel 3a-butyl-9b-hydroxy-2-thioxo-1,2,3,3a,5,9b-hexahydro-imidazo[4,5- c ]quinolin-2-ones in high yields. These compounds rearrange in boiling acetic acid or concd hydrochloric acid to give ( E )- and/or ( Z )-4-butylidene-2-thioxo-1′ H -spiro[imidazoline-5,3′-indole]-2,2′-diones. All compounds were characterized by their 1 H, 13 C, IR and MS spectra, and some of them also by 15 N NMR. The structure of one compound was investigated by single-crystal X-ray diffraction.