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Bo S, Zhang D, Ma M, Mo X, Stabinska J, McMahon MT, Shi C, Luo L. Acyl Hydrazides and Acyl Hydrazones as High-Performance Chemical Exchange Saturation Transfer MRI Contrast Agents. Pharmaceuticals (Basel) 2023; 16:ph16050639. [PMID: 37242423 DOI: 10.3390/ph16050639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/17/2023] [Accepted: 04/20/2023] [Indexed: 05/28/2023] Open
Abstract
Chemical exchange saturation transfer (CEST) MRI is a versatile molecular imaging approach that holds great promise for clinical translation. A number of compounds have been identified as suitable for performing CEST MRI, including paramagnetic CEST (paraCEST) agents and diamagnetic CEST (diaCEST) agents. DiaCEST agents are very attractive because of their excellent biocompatibility and potential for biodegradation, such as glucose, glycogen, glutamate, creatine, nucleic acids, et al. However, the sensitivity of most diaCEST agents is limited because of small chemical shifts (1.0-4.0 ppm) from water. To expand the catalog of diaCEST agents with larger chemical shifts, herein, we have systematically investigated the CEST properties of acyl hydrazides with different substitutions, including aromatic and aliphatic substituents. We have tuned the labile proton chemical shifts from 2.8-5.0 ppm from water while exchange rates varied from ~680 to 2340 s-1 at pH 7.2, which allows strong CEST contrast on scanners down to B0 = 3 T. One acyl hydrazide, adipic acid dihydrazide (ADH), was tested on a mouse model of breast cancer and showed nice contrast in the tumor region. We also prepared a derivative, acyl hydrazone, which showed the furthest shifted labile proton (6.4 ppm from water) and excellent contrast properties. Overall, our study expands the catalog of diaCEST agents and their application in cancer diagnosis.
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Affiliation(s)
- Shaowei Bo
- Department of Medical Imaging, The Affiliated Guangdong Second Provincial General Hospital of Jinan University, Guangzhou 510317, China
| | - Dong Zhang
- Medical Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou 510632, China
| | - Mengjie Ma
- Medical Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou 510632, China
| | - Xukai Mo
- Medical Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou 510632, China
| | - Julia Stabinska
- The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21287, USA
| | - Michael T McMahon
- The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD 21287, USA
| | - Changzheng Shi
- Medical Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou 510632, China
| | - Liangping Luo
- Department of Medical Imaging, The Affiliated Guangdong Second Provincial General Hospital of Jinan University, Guangzhou 510317, China
- Medical Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou 510632, China
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Khomenko DM, Doroshchuk RO, Ohorodnik YM, Ivanova HV, Zakharchenko BV, Raspertova IV, Vaschenko OV, Dobrydnev AV, Grygorenko OO, Lampeka RD. Expanding the chemical space of 3(5)-functionalized 1,2,4-triazoles. Chem Heterocycl Compd (N Y) 2022; 58:116-128. [PMID: 35340781 PMCID: PMC8940976 DOI: 10.1007/s10593-022-03064-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/30/2022] [Indexed: 01/30/2023]
Abstract
An efficient approach to the gram-scale synthesis of 3(5)-substituted, 1,3- and 1,5-disubstituted 1,2,4-triazole-derived building blocks is described. The key synthetic precursors - 1,2,4-triazole-3(5)-carboxylates (20 examples, 35-89% yield) were prepared from readily available acyl hydrazides and ethyl 2-ethoxy-2-iminoacetate hydrochloride. Further transformations were performed following the convergent synthetic strategy and allowed the preparation of 1,3- and 1,5-disubstituted 1,2,4-triazole-derived esters (16 examples, 25-75% yield), 3(5)-substituted, 1,3- and 1,5-disubstituted carboxylate salts (18 examples, 78-93% yield), amides (5 examples, 82-93% yield), nitriles (5 examples, 30-85% yield), hydrazides (6 examples, 84-89% yield), and hydroxamic acids (3 examples, 73-78% yield). Considering wide applications of the 1,2,4-triazole motif in medicinal chemistry, these compounds are valuable building blocks for lead-oriented synthesis; they have also great potential for coordination chemistry. Supplementary Information The online version contains supplementary material available at 10.1007/s10593-022-03064-z.
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Affiliation(s)
- Dmytro M Khomenko
- Enamine Ltd., 78 Chervonotkatska St., Kyiv, 02094 Ukraine.,Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Roman O Doroshchuk
- Enamine Ltd., 78 Chervonotkatska St., Kyiv, 02094 Ukraine.,Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Yulia M Ohorodnik
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Hanna V Ivanova
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Borys V Zakharchenko
- Enamine Ltd., 78 Chervonotkatska St., Kyiv, 02094 Ukraine.,Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Ilona V Raspertova
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Oleksandr V Vaschenko
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Alexey V Dobrydnev
- Enamine Ltd., 78 Chervonotkatska St., Kyiv, 02094 Ukraine.,Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd., 78 Chervonotkatska St., Kyiv, 02094 Ukraine.,Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
| | - Rostyslav D Lampeka
- Taras Shevchenko National University of Kyiv, 60 Volodymyrska St., Kyiv, 01601 Ukraine
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