Sulfenylation of heterocyclic 1,3-dicarbonyl systems: 4-Hydroxy-2-pyrones, 6-hydroxy-4-pyrimidones, 4-hydroxy-2-pyridones, 4-hydroxy-6-pyridazinones, and 5-hydroxy-3-pyrazolones
作者:Barbara Schnell、Thomas Kappe
DOI:10.1002/jhet.5570370439
日期:2000.7
compounds 1, 9,14, and 19, react in dimethylformamide in the presence of potassium carbonate with diaryl disulfides 2 to yield arylsulfenyl derivatives (3, 10, 15, 20). The arylthiolate anions 4 formed in this reaction can be oxidized by air to yield the starting disulfides 2 again. Tetraalkylthiuram disulfides 7 react in the same manner to yield dialkylaminothiocarbonylthio derivatives (8, 13, 18) of the title
烯醇化的杂芳族1,3-二羰基体系,如标题化合物的阴离子1,9,14,和19,二甲基甲酰胺反应,在碳酸钾的存在下与碳酸二芳基二硫化物2,得到芳基氧硫基衍生物(3,10,15,20)。该反应中形成的芳基硫醇盐阴离子4可以被空气氧化,再次产生起始二硫化物2。四烷基二硫化物7中相同的方式进行反应,得到dialkylaminothiocarbonylthio衍生物(8,13,18的标题化合物)。在氢氧化钠溶液中用过氧化氢氧化芳基亚硫基衍生物通常会导致亚砜(5,11,16),而与过乙酸,得到砜(氧化6,12,17)。