1: [1,2,3,4,4a,8a-(13)C6]-2-bromonaphthalene With n-butyllithium in diethyl ether; pentane 0.0833333 h; Inert atmosphere; 2: oxirane in diethyl ether; pentane 0.5 h; Cooling with iceInert atmosphere;

Multi-step reaction with 6 steps 1.1: AlCl3, aluminium chloride / 18 h / 20 °C2.1: potassium hydroxide / water; diethylene glycol / 0.5 h2.2: 21.5 h / 20 - 180 °C / Inert atmosphere3.1: polyphosphoric acid / 1.5 h / 90 °C4.1: sodium tetrahydroborate / tetrahydrofuran; ethanol / 1 h / 20 °C5.1: toluene-4-sulfonic acid / toluene / 1.25 h / 70 - 75 °C6.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,4-dioxane / 1.25 h / 100 °C