thionyl chloride in benzene 12 h; Heating; Yield given;

1: 1) CH3CH2MgBr / 1) ether, 15 min., reflux; 2) 5 h, reflux 2: 0.31 g / AlCl3 / benzene / 5 h / Heating 3: thionyl chloride / benzene / 12 h / Heating View Scheme

1: 0.31 g / AlCl3 / benzene / 5 h / Heating 2: thionyl chloride / benzene / 12 h / Heating View Scheme