Synthesis of Some 7H‐s‐Triazolo[3,4‐b]‐1,3,4‐thiadiazine Derivatives

Abstract

The cyclization of l-amino-2-mercapto-5-[5-methyl-l-(4-methylphenyl)-1 ,2,3-triazol-4-yl]-1 ,3,4triazole with various rx-halcketone in absolute ethanol yields 7H-3-[5-methyl-l-(4-methylphenyl)-1,2,3triazol-4-yl]-6-substituted-s-triazolo[3,4-b]-1,3,4-thiadiazines and their structures are established by elemental analysis, MS, IR and 'n NMR spectral data.

The Synthesis of Some New 7‐Methyl‐3‐substituted‐1,2,4‐triazolo[3,4‐b]benzothiazoles

“…The chem i cal shifts of the ar o matic methyl group show in the range of 2.36-2.52 ppm. 5,6 In the mass spec tra of 6a-j, the mo lec u lar ion peaks of 6b are weak (their rel a tive in ten si ties were about 1%) and the oth ers are strong. All the mem bers of 6a-j ex hibit some impor tant ion peaks at m/z 190, 189, 163, 162, 121, 110, 91, 77, We iso lated one uncyclized prod uct 7i when most of these re ac tions yield the cyclized prod ucts un der neu tral reac tion con di tions.…”

Synthesis and Antibacterial Activities of 2‐(1‐Aryl‐5‐Methyl‐1,2,3‐triazol‐4‐yl)‐1,3,4‐Oxadiazole Derivatives

“…[8][9] We syn the sized 2-(1-aryl-5methyl-1,2,3-triazole-4-yl)-5-mercapto-1,3,4-oxadiazole (2) by the lat ter path way in or der to avoid cor ro sive re agents such as POCl3, PbO2 and Pb(OAC)4. [11][12] The molec u lar ions of 6 can be de tected by FAB-MS, but not by EI-MS due to the weak N-CH2-N bond. 10 Prod ucts 2~11 formed dis tinct crys tals, and their structures were con firmed by el e men tal anal y sis and spec tral data (Ta ble 1 and 2).…”

Fixed time integral sliding mode controller and its application to the suppression of chaotic oscillation in power system

“…[1][2][3][4][5] Chaotic oscillation influences the stable operation of power system, which will cause voltage collapse, angle instability and even large-scale blackout accident in the system. [6,7] Therefore, it is necessary to control chaotic oscillation of power system. Many control strategies have been suggested to suppress the chaotic oscillations of power systems, such as inverse system control, [8] adaptive optimal control, [9] state feedback control, [10] adaptive compensation control, [11] least square support vector machine control, [12] output delay feedback control, [13] adaptive backstepping control, [14] adaptive fuzzy integral sliding mode control, [15] etc.…”