hydrogenchloride in tetrahydrofuran 2 h; Heating;

Multi-step reaction with 3 steps 1: diisopropylethylamine / CH2Cl2 / 8 h2: 37 percent / 40percent aq. NaOH / dioxane / 9 h / Ambient temperature3: 1.) n-BuLi, 2.) MgBr / 1.) hexane, THF, -78 deg C, 5 min, 2.) ether, benzene, from -78 deg C to RT, 1.5 h  

Multi-step reaction with 2 steps 1: 37 percent / 40percent aq. NaOH / dioxane / 9 h / Ambient temperature2: 1.) n-BuLi, 2.) MgBr / 1.) hexane, THF, -78 deg C, 5 min, 2.) ether, benzene, from -78 deg C to RT, 1.5 h  

With  n-butyllithium; magnesium bromide  1.) hexane, THF, -78 deg C, 5 min, 2.) ether, benzene, from -78 deg C to RT, 1.5 h;  Yield given. Multistep reaction;