sodium hydroxide; thiourea 1.) 95percent ethanol, reflux, 5 h, 2.) ethanol, reflux, 5 h; Yield given. Multistep reaction;

1: 66 percent / 48percent HBr, AcOH, tetradecyltrimethylammonium bromide / 24 h / Heating 2: 1.) thiourea, 2.) 20percent NaOH / 1.) 95percent ethanol, reflux, 5 h, 2.) ethanol, reflux, 5 h View Scheme

trifluoroacetic acid in dichloromethane Exchange; Heating; Product distribution;