Yield 97.5%.ġ0 g (0.05 mol) of diphenylmethane-thiol and 2g (0.05 mol) of NaOH dissolved in 60 ml of demineralised water are introduced successively into a 250 mlįlask equipped with a magnetic stirrer and a reflux condenser. 39 g of crude diphenylmethane-thiol are thus obtained. ![]() The supernatant oil is extracted with 250 ml of diethyl ether and the organic phase is washed with 4x80 ml of water and then dried over ![]() The temperature is then again kept at the reflexįor 30 minutes after which, when the mixture has returned to ordinary temperature (15-25☌), the aqueous solution is acidified with 45 ml of concentrated After refluxing for about 5 minutes, the solution, which has become limpid, isĬooled to 20☌ and 200 ml of 2.5 N NaOH are then added dropwise whilst maintaining the said temperature. Benzhydrylsulphinyl-acetohydroxamic Acid (Adrafinil) 1ġ5.2 g (0.2 mol) of thiourea and 150 ml of demineralized water are introduced into a 500 ml three-neck flask equipped with a central mechanical stirrer,Īnd with a dropping funnel and a condenser on the (respective) side-necks.The temperature of the reaction mixture is brought to 50°and 49.4g (0.2 mol) ofīromodiphenyl- methane are added all at once whilst continuing the heating.
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