1: Ph3P(1+)CH2COOEt(Cl(1-)) With sodium hydride in tetrahydrofuran; mineral oil 1 h; Inert atmosphereReflux; 2: 4-monomethoxy-1-naphthaldehyde in tetrahydrofuran; mineral oil T=0 - 20°C; Wittig reaction; Inert atmosphere; 3: With sulfuric acid in acetone 6 h; Reflux;

1: methylalcoholic KOH-solution 2: sodium View Scheme

sodium

1: carbon disulfide; bromine / im Sonnenlicht 2: alcoholic KOH-solution 3: water View Scheme

palladium 10 on activated carbon; hydrogen in ethanol T=20°C; 15 h;