| 摘要 |
The invention comprises compounds of formula <FORM:1087001/C2/1> wherein R is a C1- 5 alkyl group, R1 is oxygen or sulphur, R2 is a phenyl, halophenyl, trihaloalkylphenyl, nitrophenyl, C1- 5 alkylphenyl, C1- 5 alkoxy-phenyl or naphthyl group, and R3 is a hydrogen atom or a cyano, C1- 5 alkyl, nitro or phenyl group, and their preparation by reaction of a compound of formula <FORM:1087001/C2/2> with a compound (R)2SO4. Chloroplatinate salts corresponding to the compounds of the invention are prepared by dissolving a monoalkyl sulphate salt in water and adding an aqueous chloroplatinic acid solution. |
