1
|
Kimura K, Kurahashi T, Matsubara S. Aerobic Direct Dioxygenation of Terminal/Internal Alkynes to α-Hydroxyketones by an Fe Porphyrin Catalyst. Chem Asian J 2021; 16:3615-3618. [PMID: 34523231 DOI: 10.1002/asia.202101019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/10/2021] [Indexed: 11/10/2022]
Abstract
We herein report a new synthetic method for the preparation of α-hydroxyketones by the dioxygenation of alkynes. The reaction proceeds at room temperature under the action of Fe porphyrin and pinacolborane under air as a green oxidant to produce α-hydroxyketones. The mild reaction conditions allow chemoselective oxidation with functional group tolerance. Terminal alkynes in addition to internal alkynes are applicable, affording unsymmetrical α-hydroxyketones that are difficult to obtain by any reported dioxygenation of unsaturated C-C bonds.
Collapse
Affiliation(s)
- Kento Kimura
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Takuya Kurahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| |
Collapse
|
2
|
Aher DS, Khillare KR, Shankarwar SG. Incorporation of Keggin-based H 3PW 7Mo 5O 40 into bentonite: synthesis, characterization and catalytic applications. RSC Adv 2021; 11:11244-11254. [PMID: 35423621 PMCID: PMC8695863 DOI: 10.1039/d1ra01179k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 02/26/2021] [Indexed: 11/21/2022] Open
Abstract
The Keggin-based molybdo-substituted tungstophosphoric acid, H3[PW7Mo5O40]·12H2O, were synthesized and incorporated with a bentonite clay by using a wetness impregnation method. The catalysts were characterized using several methods, such as inductively coupled plasma-atomic emission spectroscopy (ICP-AES), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), and thermogravimetric and differential thermal analysis (TG-DTA). This extremely active catalytic system provides a green strategy for the synthesis of 1,8-dioxo-octahydroxanthene and 1,8-dioxo-decahydroacridine derivatives under solvent free conditions at 80 °C with a good reaction mass efficiency, effective mass yield, and excellent atom economy. Both the surface acidity and catalytic activity sharply increased after H3[PW7Mo5O40]·12H2O was impregnated with bentonite clay. In addition, the PW7Mo5/bentonite catalyst can be conveniently recovered and reused numerous times without demonstrating a significant loss in activity.
Collapse
Affiliation(s)
- Dipak S Aher
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University Aurangabad 431004 MS India
| | - Kiran R Khillare
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University Aurangabad 431004 MS India
| | - Sunil G Shankarwar
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University Aurangabad 431004 MS India
| |
Collapse
|
3
|
Abstract
Iron oxide magnetic nanoparticles were synthesized with different sizes (11 and 30 nm). Subsequently they were shelled with a silica layer allowing grafting of an organic phosphine ligand that coordinated to the [MoI2(CO)3] organometallic core. The silica layer was prepared by the Stöber method using either mechanical (both 11 and 30 nm nanoparticles) or ultrasound (30 nm only) stirring. The latter nanoparticles once coated with silica were obtained with less aggregation, which was beneficial for the final material holding the organometallic moiety. The Mo loadings were found to be 0.20, 0.18, and 0.34 mmolMo·g−1 for MNP30-Si-phos-Mo,MNP11-Si-phos-Mo, and MNP30-Sius-phos-Mo, respectively, with the ligand-to-metal ratio reaching 4.6, 4.8, and 3.2, by the same order, confirming coordination of the Mo moieties to two phos ligands. Structural characterization obtained from powder X-ray diffraction (XRD), scanning electron microscopy (SEM)/ transmission electron microscopy (TEM) analysis, and Fourier-transform infrared (FTIR) spectroscopy data confirmed the successful synthesis of all nanomaterials. Olefin epoxidation of several substrates catalyzed by these organometallic nano-hybrid materials using tert-butyl hydroperoxide (tbhp) as oxidant, achieved very good results. Extensive testing of the catalysts showed that they are highly active, selective, recyclable, and efficient concerning oxidant consumption.
Collapse
|
4
|
Patil BN, Lade JJ, Parab AA, Sathe PA, Vadagaonkar KS, Chaskar AC. NBS-assisted an efficient conversion of styrenes to α-hydroxy ketones in water. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
5
|
Carlson AS, Topczewski JJ. Allylic azides: synthesis, reactivity, and the Winstein rearrangement. Org Biomol Chem 2019; 17:4406-4429. [PMID: 30969292 PMCID: PMC6530792 DOI: 10.1039/c8ob03178a] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Organic azides are useful synthetic intermediates, which demonstrate broad reactivity. Unlike most organic azides, allylic azides can spontaneously rearrange to form a mixture of isomers. This rearrangement has been named the Winstein rearrangement. Using allylic azides can result in low yields and azide racemization in some synthetic contexts due to the Winstein rearrangement. Effort has been made to understand the mechanism of the Winstein rearrangement and to take advantage of this process. Several guiding principles can be used to identify which azides will produce a mixture of isomers and which will resist rearrangement. Selective reaction conditions can be used to differentiate the azide isomers in a dynamic manner. This review covers all aspects of allylic azides including their synthesis, their reactivity, the mechanism of the Winstein rearrangement, and reactions that can selectively elaborate an azide isomer. This review covers the literature from Winstein's initial report to early 2019.
Collapse
Affiliation(s)
- Angela S Carlson
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
| | | |
Collapse
|
6
|
Ghorpade AK, Akamanchi KG. A Mild, Convenient and Efficient Sodium Nitrite Mediated Hydrolysis of α‐Halo Ketones to Corresponding α‐Hydroxy Ketones. ChemistrySelect 2017. [DOI: 10.1002/slct.201700046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Archana K. Ghorpade
- Department of Pharmaceutical Sciences and TechnologyInstitute of Chemical Technology, Matunga Mumbai India 400019
| | - Krishnacharya G. Akamanchi
- Department of Pharmaceutical Sciences and TechnologyInstitute of Chemical Technology, Matunga Mumbai India 400019
| |
Collapse
|
7
|
Acid-catalyzed C–O coupling of styrenes with N-hydroxyphthalimide: trapping alkenyl radicals by TEMPO. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.04.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
8
|
Palladium catalyzed ortho -C–H-acylation of 2-arylpyridines using phenylacetylenes and styrene epoxide. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.11.065] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
9
|
Xia XF, Zhu SL, Zhang D. Copper-catalyzed C–O coupling of styrenes with N-hydroxyphthalimide through dihydroxylamination reactions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
10
|
Xia XF, Zhu SL, Gu Z, Wang H, Li W, Liu X, Liang YM. Catalyst-Controlled Dioxygenation of Olefins: An Approach to Peroxides, Alcohols, and Ketones. J Org Chem 2015; 80:5572-80. [DOI: 10.1021/acs.joc.5b00460] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiao-Feng Xia
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Su-Li Zhu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Zhen Gu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Haijun Wang
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wei Li
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Xiang Liu
- The
Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,
School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Yong-Min Liang
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
11
|
Reddi RN, Prasad PK, Sudalai A. I2-Catalyzed Regioselective Oxo- and Hydroxy-acyloxylation of Alkenes and Enol Ethers: A Facile Access to α-Acyloxyketones, Esters, and Diol Derivatives. Org Lett 2014; 16:5674-7. [DOI: 10.1021/ol5027393] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Rambabu N. Reddi
- Chemical
Engineering and
Process Development Division, National Chemical Laboratory, Pashan Road, Pune, 411008, India
| | - Pragati K. Prasad
- Chemical
Engineering and
Process Development Division, National Chemical Laboratory, Pashan Road, Pune, 411008, India
| | - Arumugam Sudalai
- Chemical
Engineering and
Process Development Division, National Chemical Laboratory, Pashan Road, Pune, 411008, India
| |
Collapse
|
12
|
Wu X, Gao Q, Lian M, Liu S, Wu A. Direct synthesis of α-hydroxyacetophenones through molecular iodine activation of carbon–carbon double bonds. RSC Adv 2014. [DOI: 10.1039/c4ra07012g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
13
|
Zhao M, Kuang CX, Cheng XZ, Yang Q. Iron-catalyzed ketonization of 2-aryl-1,1-dibromoalkenes with KOAc: Synthesis of α-acetoxy aryl ketones via a Michael-like addition process. CHINESE CHEM LETT 2011. [DOI: 10.1016/j.cclet.2010.11.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
14
|
Kuhl N, Glorius F. Direct and efficient N-heterocyclic carbene-catalyzed hydroxymethylation of aldehydes. Chem Commun (Camb) 2010; 47:573-5. [PMID: 21038072 DOI: 10.1039/c0cc02416c] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The N-heterocyclic carbene-catalyzed coupling of several aldehydes with paraformaldehyde is reported, directly providing the corresponding valuable hydroxymethyl ketones. Results of first mechanistic experiments for this remarkably selective transformation are also provided.
Collapse
Affiliation(s)
- Nadine Kuhl
- Organisch-Chemisches Institut der Westfälischen Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | | |
Collapse
|
15
|
Acyloins from Morita–Baylis–Hillman adducts: an alternative approach to the racemic total synthesis of bupropion. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.04.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|