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Pathak JK, Kant R, Rastogi N. Chemodivergent phosphonylation of diazocarboxylates: light-on vs. light-off reactions. Org Biomol Chem 2024; 22:5224-5228. [PMID: 38869003 DOI: 10.1039/d4ob00573b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
By tapping into the divergent reactivity of diazocarboxylates under thermal and photocatalytic conditions, we could develop chemodivergent phosphonylation protocols for α-diazocarboxylates with trialkyl phosphites. While the thermal reaction led to N-P bond formation affording phosphonylated hydrazones, the visible light-mediated reaction furnished phosphonylated aryl carboxylates through C-P bond formation. Both reactions are notable for their operational simplicity and mild conditions affording products in good yields without the requirement of a metal, base or photocatalyst.
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Affiliation(s)
- Jalaj Kumar Pathak
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow-226031, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Ruchir Kant
- Biochemistry & Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow-226031, India
| | - Namrata Rastogi
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow-226031, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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Yuan S, Guerra Faura G, Areheart HE, Peulen NE, France S. Lewis Acid-Catalyzed 2,3-Dihydrofuran Acetal Ring-Opening Benzannulations toward Functionalized 1-Hydroxycarbazoles. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238344. [PMID: 36500437 PMCID: PMC9737012 DOI: 10.3390/molecules27238344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 12/02/2022]
Abstract
The development of a Lewis acid-catalyzed, intramolecular ring-opening benzannulation of 5-(indolyl)2,3-dihydrofuran acetals is described. The resulting 1-hydroxycarbazole-2-carboxylates are formed in up to 90% yield in 1 h. The dihydrofuran acetals are readily accessed from the reactions of enol ethers and α-diazo-β-indolyl-β-ketoesters. To highlight the method's synthetic utility, a formal total synthesis of murrayafoline A, a bioactive carbazole-containing natural product, was undertaken.
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Affiliation(s)
- Shaoren Yuan
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332, USA
| | - Gabriel Guerra Faura
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332, USA
| | - Hailey E. Areheart
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332, USA
| | - Natalie E. Peulen
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332, USA
| | - Stefan France
- Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332, USA
- Petit Institute for Bioengineering and Bioscience, Atlanta, GA 30332, USA
- Correspondence:
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Chiral nickel(II) complex catalyzed asymmetric [3 + 2] cycloaddition of α-diazo pyrazoleamides with 2-siloxy-1-alkenes. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Guerra Faura G, Wu B, Oyelere AK, France S. Synthetic Methodology-Enabled Discovery of a Tunable Indole Template for COX-1 Inhibition and Anti-cancer activity. Bioorg Med Chem 2022; 57:116633. [DOI: 10.1016/j.bmc.2022.116633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/10/2022] [Accepted: 01/20/2022] [Indexed: 02/07/2023]
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Zhang XJ, Zhang J, Xu YN, Li YM, Chi M, Yan Y, Wu RX, Zhang HR, Zhu YP. Cascade Wolff Rearrangement/Acylation: A Metal-Free and Eco-Friendly Approach for 4-Hydroxy-pyrazolo[3,4- b]pyridin-6-ones and N-Pyrazole Amides Synthesis from 5-Aminopyrazoles and α-Diazoketones. J Org Chem 2021; 86:17471-17481. [PMID: 34797656 DOI: 10.1021/acs.joc.1c02165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A highly chemoselective cascade Wolff rearrangement/acylation reaction between 5-aminopyrazoles and diazo compounds has been developed. The protocol can facilitate the switchable synthesis of 4-hydroxy-pyrazolo[3,4-b]pyridin-6-ones and N-pyrazole amides with the merits of a broad substrate scope, high functional group compatibility, and green and sustainable performance manner. All reactions proceeded efficiently without any catalyst and additives (acid and base) and resulted in the release of benign N2, wherein diethyl carbonate served as a green benign solvent.
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Affiliation(s)
- Xiang-Jin Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Jie Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yu-Ning Xu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yi-Ming Li
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Man Chi
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yu Yan
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Rui-Xue Wu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Hui-Ru Zhang
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
| | - Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai 264005, P. R. China
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