1: 3-iodo-3-methoxy-O-triisopropylsilylphenol; 1-ethynyl-cyclohexan-1-ol With copper(l) iodide; diisopropylamine; bis-triphenylphosphine-palladium(II) chloride T=80°C; Sonogashira coupling; 2: 2-iodo-5-methoxy-O-triisopropylsilylphenol With potassium hydroxide; copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride T=80°C; Sonogashira coupling; 3: With tetrabutyl ammonium fluoride in tetrahydrofuran T=80°C; Further stages.;