phosphoric acid, fully deuterated in water-d2 T=80°C; 48 h; Yield given;

tetra-n-butylammonium perchlorate; water-d2 in N,N-dimethyl-formamide T=25 - 30°C; Yield given. Further byproducts given. Yields of byproduct given. Title compound not separated from byproducts;