1: 3,3,4,4,5,5, 6,6,7,7,8,8,8-tridecafluorooctanol With sodium hydroxide in tetrahydrofuran; cyclohexane; water T=25°C; 2 h; 2: propyl bromide With N-benzyl-N,N,N-triethylammonium chloride in tetrahydrofuran; cyclohexane; water T=40 - 70°C; 48 h;