Adamantylazoles: VIII. Acid-catalyzed adamantylation of 1,2,4-triazol-5-ones
作者:A. D. Amandurdyeva、V. V. Saraev、N. E. Kuz’mina、E. L. Golod
DOI:10.1007/s11176-005-0151-z
日期:2004.8
3-R-1,2,4-Triazol-5-ones are adamantylated in sulfuric acid. The reaction involves the N1 atom of the ring. 4-Adamantyl-1-methyl-, 1-adamantyl-4-methyl-, and 1,4-diadamantyl-1,2,4-triazol-5-ones were also prepared. Therewith, it was found that N1 exhibits a higher reactivity than N4.
[EN] METHODS OF TREATMENT WITH AMINOLEVULINIC ACID SYNTHASE 2 (ALAS2) MODULATORS<br/>[FR] MÉTHODE DE TRAITEMENT À L'AIDE DE MODULATEURS DE L'ACIDE AMINOLÉVULINIQUE SYNTHASE 2 (ALAS2)
申请人:AGIOS PHARMACEUTICALS INC
公开号:WO2020247819A3
公开(公告)日:2021-02-25
Synthesis of [3-14C]- and [5-14C]-labelled 5-nitro-1,2,4-triazol-3-one (NTO) and study of its chemical decomposition
作者:L. Le Campion、S. de Suzzoni-Dezard、N. Robic、A. Vandais、P. Varenne、J. P. Noel、J. Ouazzani
The chemical decomposition of NTO 1 and its corresponding amine ATO 2 was investigated. To make easier the identification of the decomposition products, we synthesized C-14-labelled NTO and ATO. Our results confirmed the high stability of the NTO triazolone ring. Its scission can be achieved partially by sulfuric acid under intensive heat and pressure. The triazolone ring of ATO was cleaved in alkaline solution. Carbon dioxide is evolved leaving a polar compound assumed to be aminoguanidine. The deamination of ATO was achieved by nitrosation. In dilute HCl (0.15N), 2 equivalents of NO2- lead to the triazolone: Lb, through a radical de-diazotation of the diazo intermediate. With 3 to 10 equivalents of NO2-, the nitrosation leads exclusively to the azide 6.