Chemical Compound, Preparation

Thioketones are usually prepared through reaction of ketones with phosphorus sulfur reagents such as Lawesson's reagent, Ar2P2S4 (Figure 50). Xanthates (Greek xanthos, “yellow,” from the colour of their copper salts), thiocarbonyl derivatives of carbonates, ROC(=S)OR, are prepared from alcohols and carbon disulfide. This reaction is used to produce a soluble form of cellulose