6-Dimethyl-1-phenylpyrimidin-2(1H)-one (1) reacted with methylmagnesium iodide to afford 4,6,6-trimethyl-1-phenyl-3,6-dihydropyrimidin-2(1H)-one (8a) selectively; compound (1) reacted with methyl-lithium to give mainly 4,4,6-trimethyl-1-phenyl-3,4-dihydropyrimidin-2(1H)-one (8b). The reactions of various pyrimidin-2(1H)-ones and -thiones with organometalliccompounds, and the influence of bulkiness
Sulphur extrusion. Part 4. A halogen-catalysed conversion of thiocarbonyl compounds into their corresponding oxygen analogues using alkoxides and hydroxide
作者:Harjit Singh、Paramjit Singh、Nageshwar Malhotra
DOI:10.1039/p19810002647
日期:——
The conversion of thiocarbonylcompounds (thioureas, thioamides, and thiones) into their oxygen analogues has been performed using either (i) potassium t-butoxide with iodine, bromine, or chlorine, (ii) sodium ethoxide with bromine or chlorine, or (iii) sodium hydroxide with bromine or chlorine under phase transfer catalysis.