sulfuric acid Reflux;

sulfuric acid in isopropyl alcohol

sulfuric acid; toluene-4-sulfonic acid in benzene Heating / reflux;

zinc in benzene Esterification; 0.133333 h;

4,6-dimethylaminopyridine; N-ethyl-N,N-diisopropylamine in dichloromethane 0.5 h; Yield given. Yields of byproduct given;

PPA in (2S)-N-methyl-1-phenylpropan-2-amine hydrate

1: (S)-N-benzyl-α-methylbenzylamine With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; 2: crotonic acid isopropyl ester in tetrahydrofuran; hexane T=-78°C; 2 h; 3: (4E)-ethyl 2-ethoxycarbonyl-5-phenyl-2,4-pentadienoate in tetrahydrofuran; hexane T=-78 - 0°C; 2 h; Further stages.;

1: crotonic acid isopropyl ester; lithium (S)-N-benzyl-N-(α-methylbenzyl)-amide in tetrahydrofuran 2 h; 2: diethyl 2-[3-phenylprop-2-en-1-ylidene]propanedioate in tetrahydrofuran T=-78 - 0°C;