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Shu L, Lv Y, Chen Z, Huang Y, Zhang M, Jin Z, Li T, Chi YR. Design, synthesis and Anti-PVY activity of planar chiral thiourea derivatives incorporated with [2.2]Paracyclophane. PEST MANAGEMENT SCIENCE 2024; 80:4450-4458. [PMID: 38662600 DOI: 10.1002/ps.8149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 03/26/2024] [Accepted: 04/25/2024] [Indexed: 05/09/2024]
Abstract
BACKGROUND Potato virus Y (PVY) is a prominent representative of plant viruses. It can inflict severe damage upon Solanaceae plants, leading to global dissemination and substantial economic losses. To discover new antiviral agents, a class of planar chiral thiourea molecules through the key step of N-heterocyclic carbene-catalyzed nitrile formation reaction was synthesized with excellent optical purities for antiviral evaluations against plant virus PVY. RESULTS The absolute configurations of the planar chiral compounds exhibited obvious distinctions in the anti-PVY activities. Notability, compound (S)-4u exhibited remarkable curative activities against PVY, with a half maximal effective concentration (EC50) of 349.3 μg mL-1, which was lower than that of the ningnanmycin (NNM) (EC50 = 400.8 μg mL-1). Additionally, The EC50 value for the protective effects of (S)-4u was 146.2 μg mL-1, which was superior to that of NNM (276.4 μg mL-1). Furthermore, the mechanism-of-action of enantiomers of planar chiral compound 4u was investigated through molecular docking, defensive enzyme activity tests and chlorophyll content tests. CONCLUSION Biological mechanism studies have demonstrated that the configuration of planar chiral target compounds plays a crucial role in the molecular interaction with PVY-CP, enhancing the activity of defense enzymes and affecting chlorophyll content. The current study has provided significant insights into the roles played by planar chiralities in plant protection against viruses. This paves the way for the development of novel green pesticides bearing planar chiralities with excellent optical purities. © 2024 Society of Chemical Industry.
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Grants
- RG7/20 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2, and MOE AcRF Tier 3 Award
- RG70/21 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2, and MOE AcRF Tier 3 Award
- MOE2019-T2-2-117 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2, and MOE AcRF Tier 3 Award
- MOE2018-T3-1-003 Ministry of Education, Singapore, under its MOE AcRF Tier 1 Award, MOE AcRF Tier 2, and MOE AcRF Tier 3 Award
- NRF-NRFI2016-06 Singapore National Research Foundation under its NRF Investigatorship and Competitive Research Program
- NRF-CRP22-2019-0002 Singapore National Research Foundation under its NRF Investigatorship and Competitive Research Program
- QianjiaoheKY(2020)004 Frontiers Science Center for Asymmetric Synthesis and Medicinal Molecules, Department of Education, Guizhou Province
- 2022YFD1700300 National Key Research and Development Program of China
- 111Program, D20023 the Program of Introducing Talents of Discipline to Universities of China
- GuidaTegangHezi(2023)23 Natural Science Foundation of Guizhou University
- [2019]1020 the Science and Technology Department of Guizhou Province
- Qiankehejichu-ZK[2021]Key033 the Science and Technology Department of Guizhou Province
- 32172459 National Natural Science Foundation of China
- 21961006 National Natural Science Foundation of China
- 22371057 National Natural Science Foundation of China
- 22071036 National Natural Science Foundation of China
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Affiliation(s)
- Liangzhen Shu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Ya Lv
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Zhongyin Chen
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Yixian Huang
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Meng Zhang
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Zhichao Jin
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Tingting Li
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
| | - Yonggui Robin Chi
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang, China
- School of Chemistry, Chemical Engineering, and Biotechnology, Nanyang Technological University, Singapore, Singapore
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Hassan AA, Mohamed NK, Aly AA, Ramadan M, Gomaa HAM, Abdel-Aziz AT, Youssif BGM, Bräse S, Fuhr O. Synthesis and Antiproliferative Potential of Thiazole and 4-Thiazolidinone Containing Motifs as Dual Inhibitors of EGFR and BRAF V600E. Molecules 2023; 28:7951. [PMID: 38138441 PMCID: PMC10745574 DOI: 10.3390/molecules28247951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 12/24/2023] Open
Abstract
Thiazole and thiazolidinone recur in a wide range of biologically active compounds that reach different targets within the context of tumors and represent a promising starting point to access potential candidates for treating metastatic cancer. Therefore, searching for new lead compounds that show the highest anticancer potency with the fewest adverse effects is a major drug-discovery challenge. Because the thiazole ring is present in dasatinib, which is currently used in anticancer therapy, it is important to highlight the ring. In this study, cycloalkylidenehydrazinecarbothioamides (cyclopentyl, cyclohexyl, cyclooctyl, dihydronapthalenylidene, flurine-9-ylidene, and indolinonyl) reacted with 2-bromoacetophenone and diethylacetylenedicarboxylate to yield thiazole and 4-thiazolidinone derivatives. The structure of the products was confirmed by using infrared (IR) spectroscopy, nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry, and single-crystal X-ray analyses. The antiproliferative activity of the newly synthesized compounds was evaluated. The most effective inhibitory compounds were further tested in vitro against both epidermal growth factor receptor (EGFR) and B-Raf proto-oncogene, serine/threonine kinase (BRAFV600E) targets. Additionally, molecular docking analysis examined how these molecules bind to the active sites of EGFR and BRAFV600E.
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Affiliation(s)
- Alaa A. Hassan
- Chemistry Department, Faculty of Science, Organic Division, Minia University, Minia 61519, Egypt (A.A.A.)
| | - Nasr K. Mohamed
- Chemistry Department, Faculty of Science, Organic Division, Minia University, Minia 61519, Egypt (A.A.A.)
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Organic Division, Minia University, Minia 61519, Egypt (A.A.A.)
| | - Mohamed Ramadan
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Assiut 71524, Egypt;
| | - Hesham A. M. Gomaa
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka 72341, Aljouf, Saudi Arabia;
| | - Ahmed T. Abdel-Aziz
- Chemistry Department, Faculty of Science, Organic Division, Minia University, Minia 61519, Egypt (A.A.A.)
| | - Bahaa G. M. Youssif
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruher Institut fur Technologie, 76131 Karlsruhe, Germany
| | - Olaf Fuhr
- Institute Karlsruhe of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi), Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany;
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Singh D, Piplani M, Kharkwal H, Murugesan S, Singh Y, Aggarwal A, Chander S. Anticancer Potential of Compounds Bearing Thiazolidin-4-one Scaffold: Comprehensive Review. PHARMACOPHORE 2023. [DOI: 10.51847/ohzuia1yg6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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Alshammari MB, Aly AA, Youssif BGM, Bräse S, Ahmad A, Brown AB, Ibrahim MAA, Mohamed AH. Design and synthesis of new thiazolidinone/uracil derivatives as antiproliferative agents targeting EGFR and/or BRAF V600E. Front Chem 2022; 10:1076383. [PMID: 36578355 PMCID: PMC9792171 DOI: 10.3389/fchem.2022.1076383] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 11/18/2022] [Indexed: 12/14/2022] Open
Abstract
Thiourea derivatives of uracil were efficiently synthesized via the reaction of 5-aminouracil with isothiocyanates. Then, we prepared uracil-containing thiazoles via condensation of thioureas with diethyl/dimethyl acetylenedicarboxylates. The structures of the products were confirmed by a combination of spectral techniques including infra-red (IR), nuclear magnetic resonance (NMR), mass spectrometry (MS) and elemental analyses. A rationale for the formation of the products is presented. The newly synthesized compounds were evaluated for their in vitro antiproliferative activity against four cancer cell lines. The compounds tested showed promising antiproliferative activity, with GI50 values ranging from 1.10 µM to 10.00 µM. Compounds 3c, 5b, 5c, 5h, 5i, and 5j were the most potent derivatives, with GI50 values ranging from 1.10 µM to 1.80 µM. Compound 5b showed potent inhibitory activity against EGFR and BRAFV600E with IC50 of 91 ± 07 and 93 ± 08 nM, respectively, indicating that this compound could serve as a dual inhibitor of EGFR and BRAFV600E with promising antiproliferative properties. Docking computations revealed the great potency of compounds 5b and 5j towards EGFR and BRAFV600E with docking scores of -8.3 and -9.7 kcal/mol and -8.2 and -9.3 kcal/mol, respectively.
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Affiliation(s)
- Mohammed B. Alshammari
- Chemistry Department, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University, Al-Kharij, Saudi Arabia
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Minia University, El-Minia, Egypt,*Correspondence: Ashraf A. Aly, , ; Bahaa G. M. Youssif, ; Stefan Bräse,
| | - Bahaa G. M. Youssif
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Assiut University, Asyut, Egypt,*Correspondence: Ashraf A. Aly, , ; Bahaa G. M. Youssif, ; Stefan Bräse,
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruher Institut fur Technologie, Karlsruhe, Germany,Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology, Karlsruhe, Germany,*Correspondence: Ashraf A. Aly, , ; Bahaa G. M. Youssif, ; Stefan Bräse,
| | - Akil Ahmad
- Chemistry Department, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University, Al-Kharij, Saudi Arabia
| | - Alan B. Brown
- Chemistry Department, Florida Institute of Technology, Melbourne, FL, United States
| | - Mahmoud A. A. Ibrahim
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia, Egypt
| | - Asmaa H. Mohamed
- Chemistry Department, Faculty of Science, Minia University, El-Minia, Egypt
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X-ray Structures and Computational Studies of Two Bioactive 2-(Adamantane-1-carbonyl)- N-substituted Hydrazine-1-carbothioamides. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238425. [PMID: 36500517 PMCID: PMC9741201 DOI: 10.3390/molecules27238425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/11/2022] [Accepted: 11/25/2022] [Indexed: 12/05/2022]
Abstract
Two biologically active adamantane-linked hydrazine-1-carbothioamide derivatives, namely 2-(adamantane-1-carbonyl)-N-(tert-butyl)hydrazine-1-carbothioamide) 1 and 2-(adamantane-1-carbonyl)-N-cyclohexylhydrazine-1-carbothioamide 2, have been synthesized. X-ray analysis was conducted to study the effect of the t-butyl and cyclohexyl moieties on the intermolecular interactions and conformation of the molecules in the solid state. X-ray analysis reveals that compound 1 exhibits folded conformation, whereas compound 2 adopts extended conformation. The Hirshfeld surface analysis indicates that the contributions of the major intercontacts involved in the stabilization of the crystal structures do not change much as a result of the t-butyl and cyclohexyl moieties. However, the presence and absence of these contacts is revealed by the 2D-fingerprint plots. The CLP-Pixel method was used to identify the energetically significant molecular dimers. These dimers are stabilized by different types of intermolecular interactions such as N-H···S, N-H···O, C-H···S, C-H···O, H-H bonding and C-H···π interactions. The strength of these interactions was quantified by using the QTAIM approach. The results suggest that N-H···O interaction is found to be stronger among other interactions. The in vitro assay suggests that both compounds 1 and 2 exhibit urease inhibition potential, and these compounds also display moderate antiproliferative activities. Molecular docking analysis shows the key interaction between urease enzyme and title compounds.
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Elbastawesy MA, Aly AA, El-Shaier YA, Brown AB, Abuo-Rahma GEDA, Ramadan M. New 4-thiazolidinone/quinoline-2-ones scaffold: Design, synthesis, docking studies and biological evaluation as potential urease inhibitors. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130845] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Stereoselective synthesis of homochiral paracyclophanylindenofuranylimidazo[3.3.3]propellanes. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02853-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Nitrogen-Containing Heterocycles as Significant Molecular Scaffolds for Medicinal and Other Applications. Molecules 2021; 26:molecules26154617. [PMID: 34361770 PMCID: PMC8347225 DOI: 10.3390/molecules26154617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 07/28/2021] [Indexed: 11/17/2022] Open
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Aly AA, Bräse S, Hassan AA, Mohamed NK, El-Haleem LEA, Nieger M, Morsy NM, Alshammari MB, Ibrahim MAA, Abdelhafez EMN. Design, Synthesis, and Molecular Docking of Paracyclophanyl-Thiazole Hybrids as Novel CDK1 Inhibitors and Apoptosis Inducing Anti-Melanoma Agents. Molecules 2020; 25:molecules25235569. [PMID: 33260954 PMCID: PMC7729638 DOI: 10.3390/molecules25235569] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 12/13/2022] Open
Abstract
Three new series of paracyclophanyl-dihydronaphtho[2,3-d]thiazoles and paracyclophanyl-thiazolium bromides were designed, synthesized, and characterized by their spectroscopic data, along with X-ray analysis. One-dose assay results of anticancer activity indicated that 3a–e had the highest ability to inhibit the proliferation of different cancer cell lines. Moreover, the hybrids 3c–e were selected for five-dose analyses to demonstrate a broad spectrum of antitumor activity without apparent selectivity. Interestingly, series I compounds (Z)-N-substituted-4,9-dihydronaphtho[2,3-d]thiazol-3(2H)-yl)-4′-[2.2]paracyclophanylamide) that are carrying 1,4-dihydronaphthoquinone were more active as antiproliferative agents than their naphthalene-containing congeners (series II: substituted 2-(4′-[2.2]paracyclophanyl)hydrazinyl)-4-(naphth-2-yl)-thiazol-3-ium bromide hybrids) and (series III: 3-(4′-[2.2]paracyclophanyl)amido-2-(cyclopropylamino)-4-(naphth-2-yl)thiazol-3-ium bromide) toward the SK-MEL-5 melanoma cell line. Further antiproliferation investigations of 3c and 3e on the healthy, normal unaffected SK-MEL-5 cell line indicated their relative safety. Compound 3c showed an inhibition of eight isoforms of cyclin-dependent kinases (CDK); however, it exhibited the lowest IC50 of 54.8 nM on CDK1 in comparison to Dinaciclib as a reference. Additionally, compound 3c revealed a remarkable downregulation of phospho-Tyr15 with a level (7.45 pg/mL) close to the reference. 3c mainly showed cell cycle arrest in the pre-G1 and G2/M phases upon analysis of the SK-MEL-5 cell line. The sequential caspase-3 assay for 3c indicated a remarkable overexpression level. Finally, a molecular docking study was adopted to elucidate the binding mode and interactions of the target compounds with CDK1.
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Affiliation(s)
- Ashraf A. Aly
- Department of Chemistry, Faculty of Science, Minia University, El Minia 61519, Egypt; (A.A.H.); (N.K.M.); (M.A.A.I.)
- Correspondence: or (A.A.A.); (S.B.); or (E.M.N.A.); Tel.: +20-10-0626-8742 (A.A.A.); +49-721-608-42902 (S.B.); +20-10-2158-3335 (E.M.N.A.)
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany;
- Institute of Biological and Chemical Systems–Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
- Correspondence: or (A.A.A.); (S.B.); or (E.M.N.A.); Tel.: +20-10-0626-8742 (A.A.A.); +49-721-608-42902 (S.B.); +20-10-2158-3335 (E.M.N.A.)
| | - Alaa A. Hassan
- Department of Chemistry, Faculty of Science, Minia University, El Minia 61519, Egypt; (A.A.H.); (N.K.M.); (M.A.A.I.)
| | - Nasr K. Mohamed
- Department of Chemistry, Faculty of Science, Minia University, El Minia 61519, Egypt; (A.A.H.); (N.K.M.); (M.A.A.I.)
| | - Lamiaa E. Abd El-Haleem
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany;
- Institute of Biological and Chemical Systems–Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany
| | - Martin Nieger
- Department of Chemistry, University of Helsinki, P.O. Box 55 (A. I. Virtasen aukio I), 00014 Helsinki, Finland;
| | - Nesrin M. Morsy
- National Research Centre, Organometallic and Organometalloid Chemistry Department, Dokki, Cairo 12622, Egypt;
| | - Mohammed B. Alshammari
- College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Alkharj 11942, Saudi Arabia;
| | - Mahmoud A. A. Ibrahim
- Department of Chemistry, Faculty of Science, Minia University, El Minia 61519, Egypt; (A.A.H.); (N.K.M.); (M.A.A.I.)
| | - Elshimaa M. N. Abdelhafez
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, El Minia 61519, Egypt
- Correspondence: or (A.A.A.); (S.B.); or (E.M.N.A.); Tel.: +20-10-0626-8742 (A.A.A.); +49-721-608-42902 (S.B.); +20-10-2158-3335 (E.M.N.A.)
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Synthesis of New Planar-Chiral Linked [2.2]Paracyclophanes- N-([2.2]-Paracyclophanylcarbamoyl)-4-([2.2]Paracyclophanylcarboxamide, [2.2]Paracyclophanyl-Substituted Triazolthiones and -Substituted Oxadiazoles. Molecules 2020; 25:molecules25153315. [PMID: 32707754 PMCID: PMC7436044 DOI: 10.3390/molecules25153315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 01/26/2023] Open
Abstract
The manuscript describes the synthesis of new racemic and chiral linked paracyclophane assigned as N-5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)carbamoyl)-5’-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)carboxamide. The procedure depends upon the reaction of 5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)hydrazide with 5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)isocyanate. To prepare the homochiral linked paracyclophane of a compound, the enantioselectivity of 5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)carbaldehyde (enantiomeric purity 60% ee), was oxidized to the corresponding acid, which on chlorination, gave the corresponding acid chloride of [2.2]paracyclophane. Following up on the same procedure applied for the preparation of racemic-carbamoyl and purified by HPLC purification, we succeeded to obtain the target Sp-Sp-N-5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)carbamoyl)-5’-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)carboxamide. Subjecting N-5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)hydrazide to various isothiocyanates, the corresponding paracyclophanyl-acylthiosemicarbazides were obtained. The latter compounds were then cyclized to a new series of 5-(1,4(1,4)-dibenzenacyclohexaphane-12-yl)-2,4-dihydro-3H-1,2,4-triazol-3-thiones. 5-(1,4(1,4)-Dibenzenacyclohexaphane-12-yl)-1,3,4-oxadiazol-2-amines were also synthesized in good yields via internal cyclization of the same paracyclophanyl-acylthiosemicarbazides. NMR, IR, and mass spectra (HRMS) were used to elucidate the structure of the obtained products. The X-ray structure analysis was also used as an unambiguous tool to elucidate the structure of the products.
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