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Alhthlol L, Orme CL, Jefferis BS, Herter SA, Kemper HE, Tomsho JW. Synthesis of Boron-Containing Nucleoside Analogs. J Org Chem 2024; 89:1556-1566. [PMID: 38227951 PMCID: PMC10845115 DOI: 10.1021/acs.joc.3c02179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/06/2023] [Accepted: 12/18/2023] [Indexed: 01/18/2024]
Abstract
Over the last century, nucleoside-based therapeutics have demonstrated remarkable effectiveness in the treatment of a wide variety of diseases from cancer to HIV. In addition, boron-containing drugs have recently emerged as an exciting and fruitful avenue for medicinal therapies. However, borononucleosides have largely been unexplored in the context of medicinal applications. Herein, we report the synthesis, isolation, and characterization of two novel boron-containing nucleoside compound libraries which may find utility as therapeutic agents. Our synthetic strategy employs efficient one-step substitution reactions between a diverse variety of nucleoside scaffolds and an assortment of n-alkyl potassium trifluoroborate-containing electrophiles. We demonstrated that these alkylation reactions are compatible with cyclic and acyclic nucleoside substrates, as well as increasing alkyl chain lengths. Furthermore, regioselective control of product formation can be readily achieved through manipulation of base identity and reaction temperature conditions.
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Affiliation(s)
- Latifah
M. Alhthlol
- Department
of Chemistry & Biochemistry, St Joseph’s
University, University City Campus, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
- Department
of Chemistry, King Saud bin Abdulaziz University
for Health Sciences, Al Mubarraz, Alahsa 36428, Saudi Arabia
| | - Christopher L. Orme
- Department
of Chemistry & Biochemistry, St Joseph’s
University, University City Campus, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
| | - Ben S. Jefferis
- Department
of Chemistry & Biochemistry, St Joseph’s
University, University City Campus, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
| | - Sarah A. Herter
- Department
of Chemistry & Biochemistry, St Joseph’s
University, University City Campus, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
| | - Halee E. Kemper
- Department
of Chemistry & Biochemistry, St Joseph’s
University, University City Campus, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
| | - John W. Tomsho
- Department
of Chemistry & Biochemistry, St Joseph’s
University, University City Campus, 600 South 43rd Street, Philadelphia, Pennsylvania 19104, United States
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Duan S, Zhang X, Li X, Chi Z, Xie Z. Total Synthesis of Guajavadimer A via Lewis Acid-Catalyzed Cascade Double Hetero-Diels-Alder Reactions. Org Lett 2023; 25:6987-6992. [PMID: 37725076 DOI: 10.1021/acs.orglett.3c02522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
The first total synthesis of guajavadimer A, a dimeric caryophyllene-derived meroterpenoid featuring an unprecedented 4-9-6-6-6-9-4-fused ring system, is reported. Key to the approach is the construction of the pyrano[4,3,2-de]chromene core via a cascade of double hetero-Diels-Alder reactions. Practically, a 4-substituted-2,6-dihydroxybenzaldehyde dimethyl acetal serves as an effective surrogate for ortho-quinone methide, which is generated from the corresponding aldehyde and trimethyl orthoformate, with β-caryophyllene undergoing cycloaddition to generate pyrano[4,3,2-de]chromene derivatives with excellent regioselectivity and stereoselectivity in one pot under mild conditions.
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Affiliation(s)
- Shengfu Duan
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Xing Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Xiangxin Li
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Zhiyong Chi
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Zhixiang Xie
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
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