Synthesis of bis-(3,5)pyrazolophanes via double cycloadditive macrocyclisation

Double cycloadditive macrocyclisation of bis-hydrazonoyl chlorides were performed with bis-allyl ethers and , bis-vinyl ether and bis-propargyl ether . The title compounds having a 18-, 19-, 22- or 24- membered ring annulated to the pyrazole units were obtained with good overall yield.