Reactions of hydrazonoyl halides 43:: Synthesis of some new 2,3-dihydro-1,3,4-thiadiazoles, pyrazoles, pyrazolo[3,4-d]-pyridazines, thieno[2,3-b]pyridines, pyrimidino[4′,5′:4,5]thieno[2,3-b]pyridines and pyrrolo[3,4-d]pyrazoles

2,3-Dihydro-1,3,4-thiadiazoles, pyrazoles, pyrazolo[3,4-d]pyridazines, thieno[2,3-b]pyridines, pyrimidino[4',5':4,5]thieno[2,3-b]pyridines and pyrrolo[3,4-d]pyrazoles were obtained in a good yields by treatment of hydrazonoyl halides with each of alkyl carbodithioates, 3-(dimethyl amino)-1-naphtho[1,2-d] furan-2-ylprop-2-en-1-one and N-arylmalemides.