triethylamine in ethylene glycol dimethyl ether 1.) -10 - -5 degC; 2.) 1 h, r.t.;

1: benzene / 3 h / |Reflux; |Inert atmosphere 2: hydrogenchloride / water; 1,4-dioxane / 3 h / |Inert atmosphere; |Reflux View Scheme

triethylamine 1.) chloroform, 1 h, r.t.; 2.) 48 h, r.t.; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;