... Much attention has been paid to the syntheses of halo- genated cyano-substituted heterocyclic compounds by hydrogen ... Na NC HCl огНВг CN 2 H2N-UNJ пун NaW/RCH or R NCy^j, HjN^N ... REFERENCES AND NOTES [1] P. Victory and M. Garriga, Heterocycles, 23, 1947 (1985 ...