Solvent promoted tautomerism in thione-containing tetraazatricyclics: evidence from 1H NMR spectroscopy and transition state studies

被引:1
作者
Odame, Felix [1 ]
Tshentu, Zenixole R. [2 ]
Lobb, Kevin [3 ]
机构
[1] Univ Hlth & Allied Sci, Dept Basic Sci, PMB 31, Ho, Ghana
[2] Nelson Mandela Univ, Dept Chem, POB 77000, ZA-6031 Gqeberha, South Africa
[3] Rhodes Univ, Dept Chem, POB 94, ZA-6140 Makhanda, South Africa
基金
英国医学研究理事会; 新加坡国家研究基金会;
关键词
Transition state; Tautomerism; Tetraazatricyclics; Thiones; PROTON-TRANSFER; DFT; BASES; PATH;
D O I
10.1007/s00894-022-05204-w
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Tautomerism in the nitro substituted thione-containing traazatricyclics has been investigated. Evidence from H-1 NMR indicating the existence of the tautomers has been augmented with computational studies providing evidence of the stability or otherwise of these tautomers. The role of water and DMSO in the formation of the tautomers has been explained. The role of the nitro group in assisting in the formation of the tautomers has been discussed.
引用
收藏
页数:9
相关论文
共 27 条
[1]   Proton transfer in the benzimidazolone and benzimidazolthione tautomerism process catalyzed by polar protic solvents [J].
Abdeldjebar, Hasnia ;
Belmiloud, Yamina ;
Djitli, Wassila ;
Achour, Sofien ;
Brahimi, Meziane ;
Tangour, Bahoueddine .
PROGRESS IN REACTION KINETICS AND MECHANISM, 2019, 44 (02) :143-156
[2]   Proton-Transfer Mechanism in 2-Thioxoimidazolidin-4-one: A Competition between Keto/Enol and Thione/Thiol Tautomerism Reactions [J].
Bagheri, Setodeh ;
Roohi, Hossein .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 2009, 82 (04) :446-452
[3]   DENSITY-FUNCTIONAL THERMOCHEMISTRY .3. THE ROLE OF EXACT EXCHANGE [J].
BECKE, AD .
JOURNAL OF CHEMICAL PHYSICS, 1993, 98 (07) :5648-5652
[4]   X-ray Single Crystal Structure, Tautomerism Aspect, DFT, NBO, and Hirshfeld Surface Analysis of a New Schiff Bases Based on 4-Amino-5-Indol-2-yl-1,2,4-Triazole-3-Thione Hybrid [J].
Boraei, Ahmed T. A. ;
Soliman, Saied M. ;
Haukka, Matti ;
El Tamany, El Sayed H. ;
Al-Majid, Abdullah Mohammed ;
Barakat, Assem .
CRYSTALS, 2021, 11 (09)
[5]   Quantum chemical investigation of intramolecular thione-thiol tautomerism of 1,2,4-triazole-3-thione and its disubstituted derivatives [J].
Davari, Mehdi D. ;
Bahrami, Homayoon ;
Haghighi, Zahra Zolmajd ;
Zahedi, Mansour .
JOURNAL OF MOLECULAR MODELING, 2010, 16 (05) :841-855
[6]  
Frisch M. J., 2003, GAUSSIAN03
[7]   THE PATH OF CHEMICAL-REACTIONS - THE IRC APPROACH [J].
FUKUI, K .
ACCOUNTS OF CHEMICAL RESEARCH, 1981, 14 (12) :363-368
[8]  
Gastaca B., 2019, Int. J. Anal. Mass Spectrom. Chromatogr., P19
[9]   AN IMPROVED ALGORITHM FOR REACTION-PATH FOLLOWING [J].
GONZALEZ, C ;
SCHLEGEL, HB .
JOURNAL OF CHEMICAL PHYSICS, 1989, 90 (04) :2154-2161
[10]   On tautomerism of diazinones [J].
Graff, Marek ;
Dobrowolski, Jan Cz. .
COMPUTATIONAL AND THEORETICAL CHEMISTRY, 2013, 1026 :55-64