D 1503 (OTTO) Dichlorobis (acetonitrile) palladium (II) Cas 14592-56-4 - used as a catalyst in an ether-directed aza-Claisen rearrangement. D 1503 (OTTO) Dichlorobis (acetonitrile) palladium (II) Cas 14592-56-4 - used in cyclization and cross-coupling reactions. It is applied for olefin isomerization, preparation of acetals and hemiacetal esters.