Cl[CH2:2][C:3]#[N:4].C(=S)([S-])[S-:6].[Na+].[Na+].[C:11]([C:13]1[CH:21]=[CH:20][C:16]([C:17](Cl)=[O:18])=[CH:15][CH:14]=1)#[N:12]>ClCCl.CCCCCC>[C:3]([CH2:2][S:6][C:17](=[O:18])[C:16]1[CH:20]=[CH:21][C:13]([C:11]#[N:12])=[CH:14][CH:15]=1)#[N:4]Chloroacetonitrile (13.1 ml; 0.203 mol) is added over 15 minutes to a cold (15° C.) 2 N solution of sodium trithiocarbonate (92.5 ml; 0.185 mol). The reaction mixture is stirred one hour at 5° C., extracted with ether, and the aqueous layer added dropwise to a solution of p-cyanobenzoyl chloride (20.9 g; 0.124 mol) in dichloromethane (40 ml). During addition, the temperature of the reaction mixture is held below 12° C. The reaction mixture is then held at 0°-5° C. for 2 hours, diluted with hexane (50 ml) and filtered to yield 26 g of a yellow solid. This solid is recrystallized from a mixture of acetone-methanol-water to afford 19.7 g of title product, a yellowish solid, melting point 129°-131° C.
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