potassium hydroxide in ethanol Ambient temperature;

sodium ethanolate in ethanol Ambient temperature;

sodium ethanolate in ethanol Ambient temperature;

in acetone 3 h; Heating;

1: 1-lt;(ethoxycarbonyl)methylgt;-2-benzylpyridinium bromide With 1,8-diazabicyclo[5.4.0]undec-7-ene in ethanol T=60°C; 0.25 h; 2: carbon disulfide in ethanol T=20°C; 0.25 h; 3: dimethyl sulfate in ethanol T=20°C; 1.5 h;

1: 1.) aq. KOH / 1.) ethanol, RT, 1 h 2: 96 percent / K2CO3 / CHCl3 / 48 h / Ambient temperature View Scheme