sodium hydroxide; phosphorous pentoxide; N,N-dimethyl-cyclohexylamine 1) 150 deg C, 1.5 h; 2) 100 deg C, 1 h; Yield given. Multistep reaction;

1: acetic acid / 0.33 h / Heating 2: 1) P4O10, N,N-dimethylcyclohexanamine; 1) 2 M NaOH / 1) 150 deg C, 1.5 h; 2) 100 deg C, 1 h View Scheme