三氟甲磺酰胺与低聚甲醛和琥珀酰胺的三组分缩合反应取决于反应条件,与双三氟甲烷磺酰胺基甲烷一起导致取代产物双[(三氟甲基磺酰基)氨基甲基]琥珀酰胺的形成,或环化产物N- [三氟甲基磺酰基]的形成氨基甲基]琥珀酰亚胺。通过三氟甲磺酰胺钠盐CF 3 SO 2 NHNa与N-氯甲基琥珀酰亚胺的反应来获得后者的尝试出乎意料地导致了N,N-双(琥珀酰亚胺基甲基)-三氟甲磺酰胺。类似地,CF 3 SO 2 NHNa与N的反应-氯甲基-邻苯二甲酰亚胺得到N,N-双(邻苯二甲酰亚胺基甲基)三氟甲磺酰胺。CF 3 SO 2 NHNa与琥珀酰亚胺和邻苯二甲酰亚胺在水和醇溶液中的反应导致开环并进一步转化形成的琥珀酸和邻苯二甲酸的单取代N-(三氟甲基磺酰基)酰胺。
Exocyclic-EndocyclicN-Acyliminium Ion Equilibration via an Intramolecular α-Thioamidoalkylation in the Synthesis of Fused N,S-Heterocyclic Systems: Some New Parameters
The reactivity of N-[aryl(or alkyl)thio(oxo or seleno)alkylamidals 6 bearing the N-(CH2)n-X-(CH2)m-Ar functionality towards neat TFA has been examined. Substrates of type 6 give, together with the products 11, 17, 19, and 25 of the “expected” π-cyclization process, the “unexpected” products 12, 18, and 26 resulting from a new tandem heteroamidoalkylation/isomerization/π-cyclization. The composition
[EN] 3,3-DISUBSTITUTED-1-HYDROXYTRIAZ-1-ENE 2-OXIDES AND WOUND-HEALING COMPOSITIONS USING THEM<br/>[FR] 3,3-DISUBSTITUÉS-1-HYDROXYTRIAZ-1-ÈNE 2-OXYDES ET COMPOSITIONS DE CICATRISATION DE PLAIE LES UTILISANT
申请人:SARMONT LLC
公开号:WO2015108835A1
公开(公告)日:2015-07-23
Esters, carbonates and imides of 3,3-disubstituted-1-hydroxytriaz-1-ene 2-oxides of the formula I are disclosed. The compounds release nitric oxide (NO) under physiologic conditions, and pharmaceutical compositions containing them are useful to aid in wound healing.
NMR Study of the Tautomeric Behavior of <i>N</i>-(α-Aminoalkyl)tetrazoles
作者:Alan R. Katritzky、Bahaa El-Dien M. El-Gendy、Bogdan Draghici、C. Dennis Hall、Peter J. Steel
DOI:10.1021/jo101195z
日期:2010.10.1
N-(α-Aminoalkyl)tetrazoles exist in solution as equilibrium mixtures of N1 and N2 tautomers. The position of equilibrium depends significantly on the polarity of the solvent and the substituents in the tetrazole ring. Interconversion between individual tautomers is shown to proceed via tightion-pair intermediates in which intramolecular recombination is faster than the intermolecular crossover since
2,4-and 2,5-bistetrazolylpyridines and the use thereof as pharmaceuticals
申请人:Hoechst Aktiengesellschaft
公开号:US05482953A1
公开(公告)日:1996-01-09
The invention relates to 2,4- and 2,5-bistetrazolylpyridines. Said compounds inhibit the enzymes proline hydroxylase and lysine hydroxylase and bring about a selective inhibition of collagen biosynthesis. They are used as fibrosuppressants and immunosuppressants.