in benzene 2 d boiling;

1: HCl 2: benzene View Scheme

in toluene byproducts: HCl; at -78°C for 1 h, warm to room temp. refluxed under atm. press. of N2 for 1 week, product dissolved in toluene, addn. of hexane; solvent removed under vac., recrystn. from hexane, elem. anal.;

in toluene byproducts: 1,8-bis(dimethylamino)naphthalene hydrochloride; at -78°C under vac., allowed to warm with stirring to room temp., 30 min, chilled to ice temp., filtered under vac., solid washed with condensed solvent, removed the solvent by distn. under vac.; solid is byproduct, solvent heated to 45°C under continuous pumping, oily solid washed with warm heptane, recrystn. led to great losses of material;