Studies on Condensed Heterocyclic Compounds XVI. Synthesis of 3-Alkyl-6-(2,4-Dichlorophenoxymethyl)-s-Triazolo[3,4-b]-1,3,4-Thiadiazoles and 6,6′-Bis(3-Aryl-s-Triazolo[3,4-b]-1,3,4-Thiadiazoles)

Several 3-alkyl-6-(2,4-dichlorophenoxymethyl)-s-triazolo3,4-b]-1,3,4-thiadiazoles 3a-3e and 6,6′-bis(3-aryl-s-triazolo3,4-b]-1,3,4-thiadiazoles) 3f-3j were synthesized. The structures of all the compounds synthesized were elucidated by elemental analyses and spectral data. The representative compounds 3a and 3b exhibited moderate biological activities.