1: 25 percent / ortophosphoric acid / 12 h / 20 °C 2: 98 percent / boron trichloride / CH2Cl2 / 2 h / 0 °C 3: 1.) n-butyl-lithium, triphenylmethane, 2.) pyridine / multistep reaction; the various dehydrohalogenated products with other bases, without acetylation; other tertiary halides View Scheme

1: 25 percent / ortophosphoric acid / 12 h / 20 °C 2: 98 percent / boron trichloride / CH2Cl2 / 2 h / 0 °C 3: 1.) n-butyl-lithium, triphenylmethane, 2.) pyridine / multistep reaction; the various dehydrohalogenated products with other bases, without acetylation; other tertiary halides View Scheme

1: 98 percent / boron trichloride / CH2Cl2 / 2 h / 0 °C 2: 1.) n-butyl-lithium, triphenylmethane, 2.) pyridine / multistep reaction; the various dehydrohalogenated products with other bases, without acetylation; other tertiary halides View Scheme

1: 2 h / 200 °C 2: 98 percent / boron trichloride / CH2Cl2 / 2 h / 0 °C 3: 1.) n-butyl-lithium, triphenylmethane, 2.) pyridine / multistep reaction; the various dehydrohalogenated products with other bases, without acetylation; other tertiary halides View Scheme

pyridine; potassium tert-butylate 1.) t-butyl alcohol, reflux; Multistep reaction;

pyridine; n-butyllithium; triphenylemethane 1.) hexane, ether, THF, 1 h; Yield given. Multistep reaction. Yields of byproduct given;

1: 89 percent / m-chloroperbenzoic acid / CHCl3 / 3 h / 0 °C 2: 19 percent / NaOH / H2O / 3 h / other conditions (1M NaOH-EtOH) View Scheme