4-methoxy-N-(1-(naphthalen-2-yl)ethylidene)aniline; ammonium formate in methanol T=80°C; 12 h; Inert atmosphere; chemoselective reaction;

1: in carbon disulfide T=20°C; 5 h; 2: With hydroxylamine-o-sulphonic acid in methanol; carbon disulfide T=0 - 20°C; 12 h; Further stages. Title compound not separated from byproducts.;

hydrogenchloride 1 h; Heating;

1: (i) Mg, Et2O, (ii) /BRN= 385737/ 2: (i) HCO2NH4, (heating), (ii) aq. HCl View Scheme