1: Methyltriphenylphosphonium bromide With potassium tert-butylate in tetrahydrofuran T=20°C; Wittig Olefination; 0.5 h; Inert atmosphere; 2: 6,7,8,9-Tetrahydro-5H-benzo[a]cyclohepten-5-one in tetrahydrofuran T=0 - 20°C; Wittig Olefination; Inert atmosphere;

1: triphenyl-methyl-phosphonium iodide With potassium tert-butylate in diethyl ether 2: 6,7,8,9-Tetrahydro-5H-benzo[a]cyclohepten-5-one in diethyl ether T=20°C; Wittig olefination; 4 h;

copper in quinoline T=200°C;

1: Zn 2: Cu / quinoline / 200 °C View Scheme

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