[OH:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[CH2:4]O.C(O)(=O)C.[C-:14]#[N:15].[K+]>CS(C)=O>[OH:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[CH2:4][C:14]#[N:15]29.8g of 2-hydroxybenzyl alcohol are dissolved in 250 ml of dimethylsulfoxide, together with 18g of potassium cyanide, and the mixture is heated to 125°C. 16g of glacial acetic acid are then added dropwise over the course of 1 hour and the mixture is stirred for a further 2 hours at 125°C. The dimethylsulfoxide is removed in vacuo and the residue is stirred with 200 ml of water and 150 ml of chloroform. The chloroform phase is separated off and the aqueous phase is re-extracted with 150 ml of chloroform. The combined chloroform phases are extracted by shaking with water and dried with sodium sulfate. After distilling off the chloroform, an oil remains, which solidifies on cooling. Yield: 19.8g = 60.5% of theory. Recrystallization from benzene/ligroin: melting point 118°C.
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