NMR-spektren 3-substituierter 1.2.4-triazole (1)

The NMR spectral characteristics of some meso‐Ionic s‐triazoles

“…In 1 and 11, the exocyclic-siilfur and oxygcn atoms arc positioned for a direct niesomeric intt:rac:tion with the 5-proton. Our observations are also in agrc:c:ment with thosc: o f Freiberg and Kriiger (5) who have established that a Mammetttype relationship correlated the chemical shift of the 5proton with up of 3-substituents in a series of 3-substituted s-triazolcs. Their data included the 3-methoxy and 3methylthio substitutents and showed the latter to be mort: cffcctivc in deshielding the 5-proton.…”

Measurements of Ionization Constants and Partition Coefficients of Guanazole Prodrugs

“…The applicability of Hammett's equation to the triazole ring was shown previously (25,26). In addition, it was found (27) that basicity increases in the presence of an electron-donating group but decreases in the presence of an electron-withdrawing group.…”

Thermal decomposition of o-azidoazobenzenes. II. Synthesis of 2-substituted benzotriazoles

“…4-(2-Azidophenylazo )phenol.-In 3 ml of concentrated hydrochloric acid and 30 ml of water was dissolved 1.34 g (0.01 mol) of o-azidoaniline. 4 The solution was cooled to 0°and diazotized by the dropwise addition of 0.71 g of sodium nitrite in 10 ml of water. After standing 15 min, the solution was filtered into a stirred solution of 0.94 g (0.01 mol) of phenol in 100 ml of water containing 1.20 g (0.03 mol) of sodium hydroxide.…”