sodium dithionite; sodium hydrogencarbonate in water; N,N-dimethyl-formamide T=120°C; 2 h; Heating; Yields of byproduct given. Title compound not separated from byproducts;

sodium dithionite; sodium hydrogencarbonate in water; N,N-dimethyl-formamide T=120°C; 2 h; Heating; Yields of byproduct given. Title compound not separated from byproducts;