Multi-step reaction with 4 steps 1: Mg / diethyl ether2: p-toluenesulfonic acid / benzene3: H2 / 10percent Pd/C / ethanol4: 1,4-dicyanobenzene, 2,4,6-collidine, cyclododecane / acetonitrile / 96 h / Irradiation; other rection time; without 1,4-dicyanobenzene and 2,4,6-collidine