1: With tetra(n-butyl)ammonium hydrogensulfate; potassium carbonate in acetone T=20 - 75°C; Baker-VenKataraman transformation; 12 h; 2: With potassium hydroxide in ethanol 0.333333 h; Heating; Further stages.;

1: ZnCl2; HCl / diethyl ether 2: MeSO2Cl; BF3-etherate / 100 °C View Scheme

1: ZnCl2; HCl / diethyl ether 2: MeSO2Cl; BF3-etherate / 100 °C View Scheme

boron trifluoride diethyl etherate; methanesulfonyl chloride T=100°C;