Investigation of Chemical Stability of Dihalogenated Organotelluranes in Organic–Aqueous Media: The Protagonism of Water
作者:Mariana L. Teixeira、Leociley R. A. Menezes、Andersson Barison、Alfredo R. M. de Oliveira、Leandro Piovan
DOI:10.1021/acs.joc.7b02971
日期:2018.7.20
telluroxide. Similar behavior was observed in pure water, demonstrating the low chemicalstability of these dihalogenated species in the presence of water. These results allow concluding that previous biological activity reported for dihalogenated organotelluranes 1a and 1b could be attributed to the corresponding derivatives from the reaction with water. In the same way as for AS-101, we demonstrated
碲化合物的生物活性与碲的氧化态或其某些结构特征密切相关。高价二卤代organotelluranes 1- [丁基(二氯)-λ 4 -tellanyl] -2-(甲氧基甲基)苯(1A)和1- [丁基(二溴化物)-λ 4 -tellanyl] -2-(甲氧基甲基)苯(1B)已被描述为蛋白酶(半胱氨酸和苏氨酸)和酪氨酸磷酸酶的抑制剂。但是,对其理化性质的关注不足。在此,使用125 Te NMR分析报告了这些有机碲烷在水中的稳定性的详细研究。二卤代有机碲化氢1a和1b在DMSO- d 6中(从25到75°C)都稳定,证明了它们的热稳定性。但是,在1a或1b中添加磷酸盐缓冲溶液(pH 2-8)会立即转化为新的Te物种,假定是相应的碲氧化物。在纯水中观察到类似的行为,表明在水的存在下这些二卤代物质的化学稳定性低。这些结果可以得出结论,先前报道的二卤代有机碲化氢1a和1b的生物活性可归因于与水反应的相应
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作者:A.A. Maksimenko、I.D. Sadekov
DOI:10.1023/a:1012478002263
日期:——
5H-1,2-oxatelluroles and their benzo analogs: Synthesis and reactions
作者:I. D. Sadekov、A. A. Maksimenko、A. V. Zakharov、B. B. Rivkin
DOI:10.1007/bf01165022
日期:1994.2
Maksimenko, A. A.; Sadekov, I. D.; Minkin, V. I., Journal of general chemistry of the USSR, 1990, vol. 60, # 2.2, p. 409 - 410
作者:Maksimenko, A. A.、Sadekov, I. D.、Minkin, V. I.
DOI:——
日期:——
MAKSIMENKO, A. A.;SADEKOV, I. D.;MINKIN, V. I., ZH. OBSHCH. XIMII, 60,(1990) N, S. 2520-2524