Birman's catalyst; nicotinic anhydride in dichloromethane T=0°C; 12 h; Resolution of racemate; optical yield given as percent eeenantioselective reaction;
1,3-bis-[(R)-1-(1-naphthyl)ethyl]-4,5-dihydro-3H-imidazolium tetrafluoroborate; potassium tert-butylate in tetrahydrofuran T=-78 - -20°C; 6.5 h; Further byproducts given. Title compound not separated from byproducts;
