| 摘要 |
PURPOSE:To readily and quickly obtain a compound useful as a fog restrainer for silver halide photograph in high yield by treating an amide-type compound with sodium hydrogenate and iodine and reacting with dithiocarbamate. CONSTITUTION:An amide-type compound expressed by formula I(R<1> is aryl, heterocycle group, alkyl, dialkylamino or alkoxy) is dissolved in a suitable solvent (e.g. THF) and sodium hydrogenate is added, then stirred at room temperature, thus iodine is further added and stirred. Next, dithiocarbamate expressed by formula II(R<2> and R<3> are lower alkyl, formable of a ring with bonding; M<+> is metallic cation) in an amount of 1-1.2 equiv. to iodine is added to the system and resultant system is stirred at room temperature for 1-2hr to afford the aimed compound expressed by formula III. 1-0.75 equiv. sodium hydrogenate and 0.75-0.5 equiv. iodine are used to 1 equiv. of the compound expressed by formula I. |
