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Huang C, Yang T, Jia J, Fu S, Hong B, Wu F, Ni F. Selenium-catalyzed allylic C-H phosphoramidation of alkenes. Org Biomol Chem 2024; 22:4882-4887. [PMID: 38809155 DOI: 10.1039/d4ob00638k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
We report herein a synthesis of allylic phosphoramidates from alkenes by selenium-catalyzed allylic C-H derivatization. This method features mild conditions, broad substrate scope, and high functional group tolerance, enabling late-stage modification of a number of complex substrates. In addition, this protocol was applied to modify caryophyllene and produced a photoaffinity probe capable of proteomic target labeling in live HeLa cells.
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Affiliation(s)
- Chengjie Huang
- Institute of Drug Discovery Technology and Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, Zhejiang 315211, China.
| | - Tao Yang
- Institute of Drug Discovery Technology and Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, Zhejiang 315211, China.
| | - Jingyang Jia
- Institute of Drug Discovery Technology and Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, Zhejiang 315211, China.
| | - Songsen Fu
- Institute of Drug Discovery Technology and Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, Zhejiang 315211, China.
| | - Bang Hong
- LeadArt Technologies Ltd, Ningbo, 315211, China
| | - Fan Wu
- Institute of Drug Discovery Technology and Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, Zhejiang 315211, China.
| | - Feng Ni
- Institute of Drug Discovery Technology and Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo, Zhejiang 315211, China.
- LeadArt Technologies Ltd, Ningbo, 315211, China
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Cui X, Chen X, Gu W, Zhang X, Sun J, Gu X, Zhang S. Enhancing the flame retardancy of polylactic acid nonwoven fabric through solvent-free transparent coating. Int J Biol Macromol 2024; 267:131358. [PMID: 38580028 DOI: 10.1016/j.ijbiomac.2024.131358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/23/2024] [Accepted: 04/01/2024] [Indexed: 04/07/2024]
Abstract
Polylactic acid (PLA) nonwovens, recognized as eco-friendly substitutes for petroleum-based synthetic fibers, face a significant challenge due to their inherent flammability. This work addresses this concern by synthesizing a hyperbranched polyphosphoramide flame retardant (TPDT) through a one-step polycondensation process without using solvent and catalyst. TPDT is subsequently applied to PLA nonwovens using a dip-pad finishing technique. Notably, with a mere 7 wt% weight gain of TPDT, the PLA nonwovens exhibit a substantial increase in the limited oxygen index (LOI) value, reaching 32.3 %. Furthermore, the damaged area in the vertical burning test is reduced by approximately 69.2 %. In the cone calorimeter test, 17 wt% weight gain of TPDT results in a 51.4 % decrease in peak heat release rate and a 56.0 % reduction in total heat release compared to the control PLA. Additionally, char residue increases from 1.5 wt% to 31.1 wt% after combustion. The strong affinity between TPDT and PLA molecules persists even after repeated abrasion, ensuring sustained flame retardancy. Importantly, the introduction of TPDT also imparts increased softness to the PLA nonwovens. This work addresses this concern by synthesizing a hyperbranched polyphosphoramide flame retardant (TPDT) through a solvent-free, catalyst-free, and one-step polycondensation process.
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Affiliation(s)
- Xinyu Cui
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xin Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Weiwen Gu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaolian Zhang
- State Key Laboratory of Marine Coating, Marine Chemical Research Institute Co.Ltd, Qingdao 266071, China
| | - Jun Sun
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaoyu Gu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Sheng Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
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Huber T, Bauer JO. A Powerful P-N Connection: Preparative Approaches, Reactivity, and Applications of P-Stereogenic Aminophosphines. Chemistry 2023:e202303760. [PMID: 38055219 DOI: 10.1002/chem.202303760] [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: 11/11/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/07/2023]
Abstract
For more than five decades, P-stereogenic aminophosphine chalcogenides and boranes have attracted scientific attention and are still in the focus of ongoing research. In the last years, novel transition metal-based synthesis methods have been discovered, in addition to the long-known use of chiral auxiliaries. Enantiomerically pure compounds with N-P+ -X- (X=O, S, BH3 ) motifs served as valuable reactive building blocks to provide new classes of organophosphorus derivatives, thereby preserving the stereochemical information at the phosphorus atom. Over the years, intriguing applications in organocatalysis and transition metal catalysis have been reported for some representatives. Asymmetric reductions of C=C, C=N, and C=O double bonds were feasible with selected P-stereogenic aminophosphine oxides in the presence of hydrogen transfer reagents. P-stereogenic aminophosphine boranes could be easily deprotected and used as ligands for various transition metals to enable catalytic asymmetric hydrogenations of olefins and imines. This review traces the emergence of a synthetically and catalytically powerful functional compound class with phosphorus-centered chirality in its main lines, starting from classical approaches to modern synthesis methods to current applications.
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Affiliation(s)
- Tanja Huber
- Institut für Anorganische Chemie, Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, D-93053, Regensburg, Germany
| | - Jonathan O Bauer
- Institut für Anorganische Chemie, Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, D-93053, Regensburg, Germany
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Li YA, Wu G, Li J. Palladium-Catalyzed N-Alkenylation of N-Aryl Phosphoramidates with Alkenes. Molecules 2023; 28:molecules28114466. [PMID: 37298944 DOI: 10.3390/molecules28114466] [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: 05/04/2023] [Revised: 05/24/2023] [Accepted: 05/28/2023] [Indexed: 06/12/2023] Open
Abstract
Versatile and concise Pd-catalyzed oxidative N-alkenylation of N-aryl phosphoramidates with alkenes is described in this study, a reaction that is of great significance but surprisingly unexploited. The transformation proceeds under mild reaction conditions, using O2 as a green oxidant and TBAB as an effective additive. An efficient catalytic system allows a variety of drug-related substrates to participate in these transformations, which is of great interest in the drug discovery and development of phosphoramidates.
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Affiliation(s)
- Yu-An Li
- Department of Orthopaedics Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Ge Wu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325015, China
| | - Jia Li
- Department of Neurology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
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Cheng F, Li D, Li J, Tang Y, Wu Y, Xu S. Synthesis of Phosphinic Amides from Chlorophosphines and Hydroxyl Amines via P(III) to P(V) Rearrangement. Org Lett 2023; 25:2555-2559. [PMID: 36876752 DOI: 10.1021/acs.orglett.3c00229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Phosphoranyl radicals are essential mediators to bring about new radicals but often produce a stoichiometric amount of phosphine oxide/sulfide waste. Herein, we devised a phosphorus-containing species as a radical precursor, but without the generation of phosphorus waste. Accordingly, a catalyst-free synthesis of phosphinic amides from hydroxyl amines and chlorophosphines via P(III) to P(V) rearrangement is described. Mechanistically, it may involve the initial formation of a R2N-O-PR2 species that undergoes homolysis of N-O bonds and subsequent radical recombination.
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Affiliation(s)
- Fang Cheng
- School of Chemistry, and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Dongqiu Li
- School of Chemistry, and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Jing Li
- School of Chemistry, and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Yuhai Tang
- School of Chemistry, and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Yong Wu
- School of Chemistry, and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Silong Xu
- School of Chemistry, and Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, P.R. China
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Qu C, Hao J, Ding H, Lv Y, Zhao XE, Zhao X, Wei W. Visible-Light-Initiated Multicomponent Reactions of α-Diazoesters to Access Organophosphorus Compounds. J Org Chem 2022; 87:12921-12931. [PMID: 36130274 DOI: 10.1021/acs.joc.2c01499] [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 simple visible-light-initiated strategy has been established for the construction of organophosphorus compounds via aerobic multicomponent reaction of α-diazoesters, cyclic ethers, and P(O)H compounds under air. A number of phosphonates and phosphinates could be efficiently isolated in moderate to good yields without the use of photosensitizers and metal reagents. This multicomponent reaction has advantages of mild condition, simple operation, eco-friendly energy, good functional-group tolerance, and gram-scale synthesis.
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Affiliation(s)
- Chengming Qu
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China
| | - Jindong Hao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China
| | - Hongyu Ding
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China
| | - Yufen Lv
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China
| | - Xian-En Zhao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China
| | - Xiaohui Zhao
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and CAS Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Qinghai 810008, P. R. China
| | - Wei Wei
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, P. R. China.,Qinghai Provincial Key Laboratory of Tibetan Medicine Research and CAS Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Qinghai 810008, P. R. China
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