. . . "28110" . "Transformation of 3-Thiocyanatoquinoline-2,4-diones in a Strong Acidic Medium"@en . . "Transformation of 3-Thiocyanatoquinoline-2,4-diones in a Strong Acidic Medium"@en . . "Rudolf, Ond\u0159ej" . "S" . . . "[DA0DEEB15C49]" . "3-Thiocyanatoquinolone-2,4-diones 2, accessible by thiocyanation of 4-hydroxy-2-quinolones, are highly sensitive towards water. However, their conversion to compounds 3 and 4 can be carried out in 96% sulfuric acid. In the presence of excess of phosphorus pentoxide, C-dealkylated compound 5 (R1 =H) was obtained from 2 (R1 = H, R2 = Bu). Inasmuch as compounds 4 can be smoothly converted to valuable compounds 7 and 8 and compounds 5 are hardly obtainable from 3-unsubstituted 2-quinolones, we decided to study the reaction of compounds 2 in detail. The influence of the type of substitution at positions 1 and 4 in 2, composition of the reaction mixture and its processing, and the reaction time on the yield of individual products 3-5 and also on lately isolated compounds 6 was studied. The results will be discussed and the reaction mechanism will be proposed."@en . "RIV/70883521:28110/11:43867499" . "3-Thiocyanatoquinolone-2,4-diones 2, accessible by thiocyanation of 4-hydroxy-2-quinolones, are highly sensitive towards water. However, their conversion to compounds 3 and 4 can be carried out in 96% sulfuric acid. In the presence of excess of phosphorus pentoxide, C-dealkylated compound 5 (R1 =H) was obtained from 2 (R1 = H, R2 = Bu). Inasmuch as compounds 4 can be smoothly converted to valuable compounds 7 and 8 and compounds 5 are hardly obtainable from 3-unsubstituted 2-quinolones, we decided to study the reaction of compounds 2 in detail. The influence of the type of substitution at positions 1 and 4 in 2, composition of the reaction mixture and its processing, and the reaction time on the yield of individual products 3-5 and also on lately isolated compounds 6 was studied. The results will be discussed and the reaction mechanism will be proposed." . "Transformation of 3-Thiocyanatoquinoline-2,4-diones in a Strong Acidic Medium" . . "Transformation of 3-Thiocyanatoquinoline-2,4-diones in a Strong Acidic Medium" . "2"^^ . "3"^^ . . "Kl\u00E1sek, Anton\u00EDn" . . . . "235809" . "RIV/70883521:28110/11:43867499!RIV12-MSM-28110___" . "Ly\u010Dka, Anton\u00EDn" . . . . "thiocyanates, quinolones, dealkylation"@en . .