pyridine in chloroform T=0 - 20°C; 19 h;

1: 1,4-dihydroxy-cyclohexane; p-toluenesulfonyl chloride With hydrogenchloride in pyridine T=0°C; Tosylation; 12 h; 2: 4-hydroxycyclohexyl 4-methylbenzenesulfonate; 1,4-cyclohexanediol di-toluenesulphonate; 1,8-diazabicyclo[5.4.0]undec-7-ene T=120°C; Elimination; 12 h;