1
|
Sugitate K, Yamashiro T, Takahashi I, Yamada K, Abe T. Oxytrofalcatin Puzzle: Total Synthesis and Structural Revision of Oxytrofalcatins B and C. J Org Chem 2023. [PMID: 37433109 DOI: 10.1021/acs.joc.3c00691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
The previously reported structures of oxytrofalcatins B and C possess a benzoyl indole core. However, following synthesis and NMR comparison of both the proposed structure and the synthesized oxazole, we have revised the structure of oxytrofalcatins B and C as oxazoles. The synthetic route developed herein can further our understanding of the biosynthetic pathways that govern the production of natural 2,5-diaryloxazoles.
Collapse
Affiliation(s)
- Kazuma Sugitate
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan
| | - Toshiki Yamashiro
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan
| | - Ibuki Takahashi
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Takumi Abe
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan
| |
Collapse
|
2
|
Sihag M, Soni R, Rani N, Kinger M, Kumar Aneja D. Recent Synthetic Applications of Hypervalent Iodine Reagents. A Review in Three Installments: Installment I. ORG PREP PROCED INT 2022. [DOI: 10.1080/00304948.2022.2113964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Affiliation(s)
- Monika Sihag
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Rinku Soni
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Neha Rani
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Mayank Kinger
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Deepak Kumar Aneja
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| |
Collapse
|
3
|
I2/TBHP-Mediated tandem cyclization and oxidation reaction: Facile access to 2,5-disubstituted oxazoles. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
4
|
Motiwala HF, Armaly AM, Cacioppo JG, Coombs TC, Koehn KRK, Norwood VM, Aubé J. HFIP in Organic Synthesis. Chem Rev 2022; 122:12544-12747. [PMID: 35848353 DOI: 10.1021/acs.chemrev.1c00749] [Citation(s) in RCA: 108] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
1,1,1,3,3,3-Hexafluoroisopropanol (HFIP) is a polar, strongly hydrogen bond-donating solvent that has found numerous uses in organic synthesis due to its ability to stabilize ionic species, transfer protons, and engage in a range of other intermolecular interactions. The use of this solvent has exponentially increased in the past decade and has become a solvent of choice in some areas, such as C-H functionalization chemistry. In this review, following a brief history of HFIP in organic synthesis and an overview of its physical properties, literature examples of organic reactions using HFIP as a solvent or an additive are presented, emphasizing the effect of solvent of each reaction.
Collapse
Affiliation(s)
- Hashim F Motiwala
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Ahlam M Armaly
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jackson G Cacioppo
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Thomas C Coombs
- Department of Chemistry, University of North Carolina Wilmington, Wilmington, North Carolina 28403 United States
| | - Kimberly R K Koehn
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Verrill M Norwood
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jeffrey Aubé
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| |
Collapse
|
5
|
Newar UD, Borra S, Maurya RA. Visible-Light 2,4-Dinitrophenol-Mediated Photoannulation of α-Azidochalcones into 2,5-Diaryloxazoles. Org Lett 2022; 24:4454-4458. [PMID: 35700202 DOI: 10.1021/acs.orglett.2c01691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel and efficient visible-light 2,4-dinitrophenol (2,4-DNP) mediated photoannulation of α-azidochalcones into 2,5-diaryloxazoles was developed. The carbon-carbon double bond of α-azidochalcone was cleaved, leading to the formation of new C-O and C-N bonds in the photoannulation. Control experiments were carried out, and a plausible mechanism of the photoannulation was proposed. The scope of the reaction was studied by synthesizing a series of 2,5-diaryloxazoles including two naturally occurring oxazoles (Texamine and Balsoxin) in excellent yields.
Collapse
Affiliation(s)
- Uma Devi Newar
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Satheesh Borra
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat 785006, India
| |
Collapse
|
6
|
Farooq S, Ngaini Z. Synthesis of Benzalacetophenone Based Isoxazoline and Isoxazole Derivatives. CURR ORG CHEM 2022. [DOI: 10.2174/1385272826666220408120350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
The demand for natural product based drugs with less cost and efficient procedures has become a challenge to researchers. Benzalacetophenone is a natural product based species that is modified into numerous heterocyclic compounds including isoxazoline and isoxazole derivatives. The utility of isoxazoline and oxazole derivatives has been increased for the synthesis of the new and effective chemical entities to serve medicinal chemistry in the past few years. Isoxazoline and isoxazole are fascinating classes of heterocyclic compounds, which belong to N- and O-heterocycles, and are widely used as precursors for the development of drugs. This review highlights the recent work for the synthesis of mono and bis isoxazoline and isoxazole derivatives using stable benzalacetophenone and functionalization of isoxazoline and isoxazole, along with the prevailing biological properties.
Collapse
Affiliation(s)
- Saba Farooq
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
| | - Zainab Ngaini
- Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia
| |
Collapse
|
7
|
Yang X, Guo X, Yuan X, Chen B. K 2S 2O 8-promoted rearrangement of nitrones for the synthesis of benzo[ d]oxazoles. Org Chem Front 2022. [DOI: 10.1039/d2qo00680d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient route for the synthesis of valuable benzoxazoles has been developed through self-oxidative cyclization with N–O bond cleavage.
Collapse
Affiliation(s)
- Xueying Yang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China
| | - Xin Guo
- School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
| | - Xinglong Yuan
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China
| | - Baohua Chen
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China
| |
Collapse
|
8
|
Kajol K, Ramesh C. Sequential One‐pot Method for the Synthesis of 4‐(Hydroxymethyl)oxazoles and their Application in Phosphonates Synthesis. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Km Kajol
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension Sitapur Road, P.O. Box 173 Lucknow 226031 India
| | - Chintakunta Ramesh
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension Sitapur Road, P.O. Box 173 Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi 110001 India
| |
Collapse
|
9
|
Dhawan S, Kumar V, Girase PS, Mokoena S, Karpoormath R. Recent Progress in Iodine‐Catalysed C−O/C−N Bond Formation of 1,3‐Oxazoles: A Comprehensive Review. ChemistrySelect 2021. [DOI: 10.1002/slct.202003969] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sanjeev Dhawan
- Department of Pharmaceutical Chemistry Discipline of Pharmaceutical Sciences College of Health Sciences University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Vishal Kumar
- Department of Pharmaceutical Chemistry Discipline of Pharmaceutical Sciences College of Health Sciences University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Pankaj S. Girase
- Department of Pharmaceutical Chemistry Discipline of Pharmaceutical Sciences College of Health Sciences University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Sithabile Mokoena
- Department of Pharmaceutical Chemistry Discipline of Pharmaceutical Sciences College of Health Sciences University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry Discipline of Pharmaceutical Sciences College of Health Sciences University of KwaZulu-Natal (Westville) Durban 4000 South Africa
| |
Collapse
|
10
|
Domaradzki ME, Liu X, Ong J, Yu G, Zhang G, Simantov A, Perl E, Chen Y. Triflic acid mediated sequential cyclization of ortho-alkynylarylesters with ammonium acetate. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
11
|
Sun M, Zhao L, Ding MW. One-Pot–Three-Component Synthesis of 2-(1,2,3,4-Tetrahydroisoquinolin-1-yl)oxazoles via DEAD-Promoted Oxidative Ugi/Wittig Reaction. J Org Chem 2019; 84:14313-14319. [DOI: 10.1021/acs.joc.9b02016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Mei Sun
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
| | - Long Zhao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
| | - Ming-Wu Ding
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University, Wuhan 430079, P. R. China
| |
Collapse
|
12
|
Synthesis of Pyrimidines with Ammonium Acetate as Nitrogen Source Under Solvent‐Free Conditions. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900248] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|