1
|
Tang SA, Fults A, Boyd SR, Gattu N, Tran KA, Fan J, MacKenzie KR, Palzkill T, Young DW, Chamakuri S. Expanding Complex Morpholines Using Systematic Chemical Diversity. Org Lett 2024; 26:3493-3497. [PMID: 38506470 DOI: 10.1021/acs.orglett.4c00528] [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] [Indexed: 03/21/2024]
Abstract
The morpholine heterocycle is a structural unit found in many bioactive compounds and FDA-approved drugs, but the generation of more complex C-functionalized morpholine derivatives remains considerably underexplored. Using systematic chemical diversity (SCD), a concept that guides the expansion of saturated drug-like scaffolds through regiochemical and stereochemical variation, we describe the synthesis of a collection of methyl-substituted morpholine acetic acid esters starting from enantiomerically pure amino acids and amino alcohols. In total, 24 diverse substituted morpholines were produced that vary systematically in regiochemistry and stereochemistry (relative and absolute). These diverse C-substituted morpholines can be directly applied in fragment screening or incorporated as building blocks in medicinal chemistry and library synthesis.
Collapse
Affiliation(s)
- Sunny Ann Tang
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Afton Fults
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Shelton R Boyd
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Nikhil Gattu
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Kevin A Tran
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Jiayi Fan
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Kevin R MacKenzie
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Timothy Palzkill
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Damian W Young
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| | - Srinivas Chamakuri
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, United States
| |
Collapse
|
2
|
Viveki AB, Mansfield TM, Tran KA, Lenkeit E, MacKenzie KR, Young DW, Chamakuri S. Heterocyclic Merging of Stereochemically Diverse Chiral Piperazines and Morpholines with Indazoles. Chemistry 2023; 29:e202301888. [PMID: 37462979 PMCID: PMC10885319 DOI: 10.1002/chem.202301888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Indexed: 08/31/2023]
Abstract
We report a heterocyclic merging approach to construct novel indazolo-piperazines and indazolo-morpholines. Starting from chiral diamines and amino alcohols, novel regiochemically (1,3 and 1,4) and stereochemically diverse (relative and absolute) cohorts of indazolo-piperazines and indazolo-morpholines were obtained within six or seven steps. The key transformations involved are a Smiles rearrangement to generate the indazole core structure and a late-stage Michael addition to build the piperazine and morpholine heterocycles. We further explored additional vector diversity by incorporating substitutions on the indazole aromatic ring, generating a total of 20 unique, enantiomerically pure heterocyclic scaffolds.
Collapse
Affiliation(s)
- Amol B Viveki
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Timothy M Mansfield
- Department of Chemistry, Rice University, 6100 Main Street, Houston, TX 77005, USA
| | - Kevin A Tran
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Evan Lenkeit
- Department of Chemistry, Rice University, 6100 Main Street, Houston, TX 77005, USA
| | - Kevin R MacKenzie
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Damian W Young
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
- Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
- Department of Chemistry, Rice University, 6100 Main Street, Houston, TX 77005, USA
| | - Srinivas Chamakuri
- Center for Drug Discovery, Department of Pathology and Immunology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| |
Collapse
|
3
|
A Concise Synthetic Method for Constructing 3-Substituted Piperazine-2-Acetic Acid Esters from 1,2-Diamines. Molecules 2022; 27:molecules27113419. [PMID: 35684357 PMCID: PMC9182393 DOI: 10.3390/molecules27113419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 11/17/2022] Open
Abstract
We report a short synthetic route for synthesizing 2,3-substituted piperazine acetic acid esters. Optically pure amino acids were efficiently converted into 1,2-diamines that could be utilized to deliver the title 2,3-substituted piperazines in five steps with a high enantiomeric purity. The novel route facilitated, for the first time, the synthesis of 3-phenyl substituted-2-piperazine acetic acid esters that were difficult to achieve using other methods; however, in this case, the products underwent racemization.
Collapse
|
4
|
Chamakuri S, Chung MK, Samuel ELG, Tran KA, Chen YC, Nyshadham P, Santini C, Matzuk MM, Young DW. Design and construction of a stereochemically diverse piperazine-based DNA-encoded chemical library. Bioorg Med Chem 2021; 48:116387. [PMID: 34571488 DOI: 10.1016/j.bmc.2021.116387] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/08/2021] [Accepted: 08/24/2021] [Indexed: 11/25/2022]
Abstract
Here we report the successful construction of a novel, stereochemically diverse DNA-Encoded Chemical Library (DECL) by utilizing 24 enantiomerically pure trifunctional 2, 6- di-substituted piperazines as central cores. We introduce the concept of positional diversity by placing the DNA attachment at either of two possible sites on the piperazine scaffold. Using a wide range of building blocks, a diverse library of 77 million compounds was produced. Cheminformatic analysis demonstrates that this library occupies a wide swath of chemical space, and that the piperazine scaffolds confers different shape diversity compared to the commonly used triazine core.
Collapse
Affiliation(s)
- Srinivas Chamakuri
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States.
| | - Mee-Kyung Chung
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Errol L G Samuel
- Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Kevin A Tran
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Ying-Chu Chen
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Pranavanand Nyshadham
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Conrad Santini
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Martin M Matzuk
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States; Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX 77030, United States
| | - Damian W Young
- Center for Drug Discovery, Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX 77030, United States; Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX 77030, United States; Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, United States.
| |
Collapse
|
5
|
Recent developments in the synthesis of piperazines (microreview). Chem Heterocycl Compd (N Y) 2021. [DOI: 10.1007/s10593-021-02998-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|