Synthesis, Mechanism Elucidation and Biological Insights of Tellurium(IV)‐Containing Heterocycles
作者:João Pedro A. Souza、Leociley R. A. Menezes、Francielle P. Garcia、Débora B. Scariot、Pamela T. Bandeira、Mateus B. Bespalhok、Siddhartha O. K. Giese、David L. Hughes、Celso V. Nakamura、Andersson Barison、Alfredo R. M. Oliveira、Renan B. Campos、Leandro Piovan
DOI:10.1002/chem.202102287
日期:2021.10.19
organotelluranes containing a Te-O bond were synthesized and characterized. Theoretical calculations elucidated the mechanism for the oxidation-cyclization processes involved in the formation of the heterocycles, consistent with chlorine transfer to hydroxy telluride, followed by a cyclization step with simultaneous formation of the new Te-O bond and deprotonation of the OH group. Moreover, theoretical
受有机碲物质的合成和生物潜力的启发,合成并表征了一系列含有 Te-O 键的五元和六元环有机碲烷。理论计算阐明了参与形成杂环的氧化环化过程的机制,与氯转移到羟基碲化物一致,随后是环化步骤,同时形成新的 Te-O 键和 OH 基团的去质子化。此外,理论计算还表明反非对映异构体是两种含有手性中心的化合物的主要产物。针对亚马逊利什曼原虫前鞭毛体的抗利什曼原虫分析揭示了 1,2λ4 -oxatellurane LQ50 (IC50 =4.1±1.0; SI=12)、1,2λ4 -oxatellurane LQ04 (IC50 =7.0±1.3; SI=7) 和 1, 2λ4 -benzoxatellurole LQ56 (IC50 =5.7±0.3; SI=6) 作为比参考化合物更强大和更具选择性的化合物,活性高达四倍。由 125 Te NMR 分析支持的稳定性研究表明,这些杂环在水性有机介质中或在高达