1: 2) AlCl3 / 1.) diethyl ether, reflux, 30 min; 2.) carbon disulphide, reflux, 30 min 2: 1.) 10percent sodium carbonate; 2.) 40percent sodium hydroxide / 1.) water, 80 deg C, 30 min; 2) 1.5 h, water bath 3: 68 percent / 0.33 h / 290 °C 4: 81.6 percent / sulfuric acid / 6 h / Heating 5: 86 percent / N-bromosuccinimide, dibenzoyl peroxide / CCl4 / 7 h / Heating 6: 69.7 percent / aluminum chloride / CS2 / 2 h / -15 - -10 °C 7: 56 percent / K2Cr2O7 / acetic acid / 16 h / 100 - 105 °C 8: 86 percent / 24percent NaOH; conc.HCl / H2O; methanol / 1.5 h / Heating 9: 56.9 percent / Raney nickel, 5percent NaOH / ethanol / 1 h / Heating View Scheme