Reactions of Hydrazonoyl Halides. Part 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.

Abstract

Ring closure reactions O 0130Reactions of Hydrazonoyl Halides. Part 43. Synthesis of Some New 2,3-Dihy- dro-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.-In view of their potential as biologically active compounds, the synthesis of title compounds like (V), (VIII), (IX), (XIV), and (XVI) is carried out, essentially by the reaction of hydrazonoyl halides (IV) with alkyl carbodithioates, e. g. (III), propenone derivative (VII), and N-arylmaleimides. -(ABDELHAMID*, A. O.; ALKHODSHI, M. A. M.; J. Heterocycl. Chem. 42 (2005) 4, 527-533; Dep. Chem., Fac. Sci., Cairo Univ., Giza 12613, Egypt; Eng.) -H. Hoennerscheid 41-035