1: 2-methylpropane-2-thiol With sodium hydride in N,N-dimethyl-formamide; mineral oil Inert atmosphereCooling with ice; 2: (+)-(S)-4-methyl-N-(1-phenylethyl)-N-tosylbenzenesulfonamide in N,N-dimethyl-formamide T=60°C; 12 h; Inert atmosphere;