Advances in the chemistry of tetrazoles (review)

Antimicrobial Assessment of Some Heterocyclic Compounds Utilizing Ethyl 1-Aminotetrazole-5-carboxylate

“…The reaction of ethyl 1-aminotetrazole-5-carboxylate (1) with hydrazine hydrate afforded the corresponding 1-aminotetrazole-5-carbohydrazide (2), which upon treating with carbon disulfide in pyridine catalyzed, gave 1-amino-5-(5-mercapto-1,3,4-oxadiazol-2-yl)tetrazole (3). The formation 5,9,10 of 3 from 2 was supported by elemental analyses and by the absence of absorption bands at 3200 and 1670 cm -1 for the respective stretching vibration of NH and CON in its IR spectrum.…”

Preparation and Characterization of Dinuclear Nickel(II) Complexes Containing N3Ni(μ1, 3‐SO3R)2(μ‐RCN4)NiN3 Cores: Crystal Structures and Magnetic Properties

“…This is in agreement with the fact that upon removal of the proton the nitrogen atoms N7, N8 and N9, N10 become equivalent. [16] It can be noted that the N(7)-N(8) bonds in 4-6 show an average bond length of 1.352(3) Å, which is much longer than the 1.295(3) Å and 1.285(3) Å found in 1-H-tetrazole and 5-methyltetrazole. [17,18] As one might expect the Ni···Ni distances in the oxidized complexes are significantly longer (0.81-0.91 Å) than the corresponding distances in their reduced counterparts in order to accommodate the coordinating sulfonate oxygen atoms.…”

Synthesis, Structure, and Biological Screening of Some Condensed Heterocyclic Compounds from 8-Chlorotetrazolo [5,1- f]-1,2,4-Triazine Precursor

“…11,12 They have emerged as antibacterial, [2][3][4][5][6][7][8]13 antiproliferation, 14 anticancer, 14 and anticonvulsant 15 agents. In this article, it is our intention to enlarge the area of the investigation towards tetrazolo-heterocycles using framework different reagants and expected interesting antimicrobial agents.…”