Institutional Repository of Coll Life & Sci Engn
Post-Synthetic Modification Research of Salan Titanium bis-Chelates via Sonogashira Reaction | |
Zhao, Tiankun; Wang, Peng; Ji, Mingyu; Li, Shanjia; Yang, Mingjun; Pu, Xiuying | |
2021-11-15 | |
发表期刊 | ACTA CHIMICA SINICA |
ISSN | 0567-7351 |
卷号 | 79期号:11页码:1385-1393 |
摘要 | A palladium-catalyzed Sonogashira reaction has been developed for the highly efficient post-modification of ONNO Salan ligand and 2,6-dipicolinic acid stabilized titanium bis-chelates with anticancer activity. Different alkynyl substituents were introduced to Salan and 2,6-dipicolinic acid, respectively. In total 20 novel titanium complexes containing mono-, di- and tri-alkynyl substituents as well as a complex containing tumor targeting ethinylestradiol were synthesized, all complexes were characterized by 1H NMR and C-13 NMR, HRMS, UV-vis and IR spectroscopy. The nature of obtained titanium complexes that losing solvent molecules fast when exposed to air makes it hard to obtain satisfactory single crystals for X-ray diffraction measurement. Most alkynyl titanium complexes exhibit enhanced inhibitory activity against HeLa S3 and Hep G2 tumor cells in the micromole range. The introduction of alkynyl group to the Salan demonstrated less significant contribution to the anti-tumoral activity. However, the anti-tumoral activity alters with different alkynyl substituents on the 2,6-dipicolinic acid. Of all complexes, 3j [Salan(2,4-dimethyl)Ti(IV) Dipic(4-(3-(dimethylamino)-prop-1-yn-1-yl))] showed excellent inhibitory activity, its IC50 value is an order of magnitude higher than that of Cisplatin, which is the most active anti-tumoral Salan titanium compound in this study [3j, HeLa S3: IC50=(0.5 +/- 0.1) mu mol/L, Hep G2: IC50=(0.7 +/- 0.2) mu mol/L; Cisplatin, HeLa S3: IC50=(3.3 +/- 0.2) mu mol/L, Hep G2: IC50=(6.0 +/- 1.1) mu mol/L]. In general, aromatic alkynyl substitution containing electron withdrawing moiety proved to have a positive influence on complex's anti-tumoral activity than those containing electron donating moiety. Short chain aliphatic alkynyl substituents benefit the complex's inhibitory activity. However, increased aliphatic chain length results in fast loss of complexes' activity. Stability study on the representative aromatic alkynyl 2a, 3a and aliphatic alkynyl 2f, 3j suggests that the alkynyl's electron nature can alter the complex stability. 2a and 2f, with substitutions on the Salan (2 position non-substituted), their half hydrolyzation time (t1/2) are 5 and 10 h, respectively. The hydrolysate of 2a was characterized to be the non-toxic alkynyl Salan ligand 1a*. For 3a and 3j, the 2 position of Salan are occupied by methyl groups, their protective effect to the titanium center resulted in a stable behavior of both in the presence of an aqueous media. In addition, the structure-activity relationship and development prospects of these novel alkynyl Salan titanium bis-chelates are summarized and prospected. |
关键词 | Sonogashira reaction [SalanTi((IV)) Dipic] complexes antitumor activity alkyne functionalization aqueous |
DOI | 10.6023/A21060282 |
收录类别 | SCIE |
语种 | 中文 |
WOS研究方向 | Chemistry |
WOS类目 | Chemistry, Multidisciplinary |
WOS记录号 | WOS:000716442000008 |
出版者 | SCIENCE PRESS |
来源库 | WOS |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/150044 |
专题 | 生命科学与工程学院 |
通讯作者 | Zhao, Tiankun |
作者单位 | Lanzhou Univ Technol, Coll Life Sci & Engn, Lanzhou 730050, Peoples R China |
第一作者单位 | 生命科学与工程学院 |
通讯作者单位 | 生命科学与工程学院 |
第一作者的第一单位 | 生命科学与工程学院 |
推荐引用方式 GB/T 7714 | Zhao, Tiankun,Wang, Peng,Ji, Mingyu,et al. Post-Synthetic Modification Research of Salan Titanium bis-Chelates via Sonogashira Reaction[J]. ACTA CHIMICA SINICA,2021,79(11):1385-1393. |
APA | Zhao, Tiankun,Wang, Peng,Ji, Mingyu,Li, Shanjia,Yang, Mingjun,&Pu, Xiuying.(2021).Post-Synthetic Modification Research of Salan Titanium bis-Chelates via Sonogashira Reaction.ACTA CHIMICA SINICA,79(11),1385-1393. |
MLA | Zhao, Tiankun,et al."Post-Synthetic Modification Research of Salan Titanium bis-Chelates via Sonogashira Reaction".ACTA CHIMICA SINICA 79.11(2021):1385-1393. |
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