methanol; palladium on activated charcoal Hydrogenation.Erhitzen des Reaktionsprodukts mit wss. HI und Essigsaeure;

1: With 2-Iodo-5-methylbenzenesulfonic acid in tert-butyl methyl ether; water; isopropyl alcohol T=0 - 5°C; 0.5 h; Inert atmosphere; 2: With Oxonereg; in tert-butyl methyl ether; water; isopropyl alcohol T=20°C; 2.25 h; Inert atmosphere; Further stages;

hydrogen; 5-palladium/activated carbon in ethanol T=20°C;