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Rizos SR, Peitsinis ZV, Koumbis AE. Total Synthesis of Enantiopure Chabrolonaphthoquinone B Via a Stereoselective Julia-Kocienski Olefination. J Org Chem 2021; 86:10440-10454. [PMID: 34247481 DOI: 10.1021/acs.joc.1c01106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of cytotoxic meroditerpenoid naphthoquinone derivative chabrolonaphthoquinone B (1) in an enantiospecific manner is divulged using a chiral pool approach. The key step of our synthetic route is a modified Julia olefination between a sulfone-bearing aliphatic fragment and a Diels-Alder-derived aromatic aldehyde, leading to the stereoselective construction of the E-trisubstituted double bond.
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Affiliation(s)
- Stergios R Rizos
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Zisis V Peitsinis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Alexandros E Koumbis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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Peitsinis ZV, Mitrakas AG, Nakiou EA, Melidou DA, Kalamida D, Kakouratos C, Koukourakis MI, Koumbis AE. Trachycladines and Analogues: Synthesis and Evaluation of Anticancer Activity. ChemMedChem 2017; 12:448-455. [PMID: 28195671 DOI: 10.1002/cmdc.201600620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 02/14/2017] [Indexed: 02/05/2023]
Abstract
The synthesis of four new analogues of marine nucleoside trachycladine A was accomplished by direct regio- and stereoselective Vorbrüggen glycosylations of 2,6-dichloropurine and 2-chloropurine with a d-ribose-derived chiron. Naturally occurring trachycladines A and B and a series of analogues were examined for their cytotoxic activity against a number of cancer cell lines (glioblastoma, lung, and cervical cancer). Parent trachycladine A and two analogues (the diacetate of the 2,6-dichloropurine derivative and N-cyclopropyl trachycladine A) resulted in a significant decrease in cell viability, with the latter exhibiting a stronger effect. The same compounds enhanced the cytotoxic effect of docetaxel in lung cancer cell lines, whereas additional experiments revealed that their mode of action relies on mitotic catastrophe rather than DNA damage. Moreover, their activity as autophagic flux blockers was postulated.
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Affiliation(s)
- Zisis V Peitsinis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Achilleas G Mitrakas
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Eirini A Nakiou
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Dafni A Melidou
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Dimitra Kalamida
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Christos Kakouratos
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Michael I Koukourakis
- Department of Radiotherapy and Oncology, Radiobiology and Radiopathology Unit, Medical School, Democritus University of Thrace, 68100, Alexandroupolis, Greece
| | - Alexandros E Koumbis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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Peitsinis ZV, Melidou DA, Stefanakis JG, Evgenidou H, Koumbis AE. A Versatile Total Synthesis of Trachycladines A and B and Their Analogues. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403091] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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