1: 3,4-dihydronaphthalene-1(2H)-one With methanol 0.25 h; Heating / reflux; 2: toluene-4-sulfonic acid hydrazide With toluene-4-sulfonic acid in methanol 4.5 h; Heating / reflux;

sodium in ethylene glycol

tert.-butylhydroperoxide in acetone 8 h; Heating;

bis-triphenylphosphine-palladium(II) chloride; phosphonic acid diethyl ester; p-benozquinone; lithium tert-butylate in N,N-dimethyl-formamide T=100°C; 12 h; Molecular sieveInert atmosphere; regioselective reaction;