1
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D'Abbrunzo I, Birolo R, Chierotti MR, Bučar DK, Voinovich D, Perissutti B, Hasa D. Enantiospecific crystallisation behaviour of malic acid in mechanochemical reactions with vinpocetine. Eur J Pharm Biopharm 2024; 201:114344. [PMID: 38815873 DOI: 10.1016/j.ejpb.2024.114344] [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: 04/09/2024] [Revised: 05/16/2024] [Accepted: 05/26/2024] [Indexed: 06/01/2024]
Abstract
We report an intriguing example of enantioselectivity in the formation of new multicomponent crystalline solid containing vinpocetine and malic acid. Several experimental data sets confirmed that the multicomponent system presents a clear enantiospecific crystallisation behaviour both in the solid-state and in solution: only the system consisting of vinpocetine and L-malic acid produces a free-flowing solid consisting of a new crystalline form, while the experiments with D-malic acid produced an amorphous and often deliquescent material. The new vinpocetine-L-malic system crystallizes in the monoclinic space group of P21 and in a 1:1 molar ratio, where the two molecules are linked through intermolecular hydrogen bonds in the asymmetric unit. The vinpocetine-DL-malic system was partially crystalline (with also traces of unreacted vinpocetine) with diffraction peaks corresponding to those of vinpocetine-L-malic acid. Solid-state NMR experiments revealed strong ionic interactions in all the three systems. However, while vinpocetine-L-malic acid system was a pure and crystalline phase, the other two systems persistently showed the presence of unreacted vinpocetine. This resulted in a significant worsening of the dissolution profile with respect to the pure vinpocetine-L-malic crystalline salt, whose dissolution kinetics appeared superior.
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Affiliation(s)
- Ilenia D'Abbrunzo
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, P.le Europa 1, 34127 Trieste, Italy
| | - Rebecca Birolo
- Department of Chemistry and NIS Centre, University of Torino, V. Giuria 7, 10125 Torino, Italy
| | - Michele R Chierotti
- Department of Chemistry and NIS Centre, University of Torino, V. Giuria 7, 10125 Torino, Italy
| | - Dejan-Krešimir Bučar
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Dario Voinovich
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, P.le Europa 1, 34127 Trieste, Italy
| | - Beatrice Perissutti
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, P.le Europa 1, 34127 Trieste, Italy.
| | - Dritan Hasa
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, P.le Europa 1, 34127 Trieste, Italy.
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2
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Wang W, Gong J, Zhao J, Zhang H, Wen W, Zhao Z, Li YJ, Wang J, Huang CZ, Gao PF. Integration of Wallach's Rule into Intermolecular Charge Transfer: A Visual Strategy for Chiral Purification. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2403249. [PMID: 39013078 DOI: 10.1002/advs.202403249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/19/2024] [Indexed: 07/18/2024]
Abstract
Exploring the molecular packing and interaction between chiral molecules, no matter single enantiomer or racemates, is important for recognition and resolution of chiral drugs. However, sensitive and non-destructive analysis methods are lacking. Herein, an intermolecular-charge transfer (ICT) based spectroscopy is reported to reveal the differences in interaction between the achiral acceptor 1,2,4,5-tetracyanobenzene (TCNB) and the chiral donors, including S, R, and racemic naproxen (S/R/rac-NAP). In this process, S-NAP+TCNB and R-NAP+TCNB display a narrower band gap attributed to the newly formed ICT state. In contrast, the mixed rac-NAP and TCNB exhibit almost no significant change due to the strong affinity between the stereoisomers according to the Wallach's rule. Thus, S/R-NAP can be easily distinguished from rac-NAP based on significantly different optical behavior. The single crystal analysis, infrared spectroscopy, fluorescence spectroscopy, and theoretical calculation of naproxen confirm the importance of carboxyl for this differentiation in molecular packing and interaction. In addition, the esterification derivatization of naproxen achieves the manipulation of the intermolecular interaction model of racemates from the absolute Wallach's rule to a coexisting form of Wallach's rule and ICT. Further, visualized chiral purification of naproxen by the simple cocrystallization method is achieved through the collaboration of ICT and Wallach's rule.
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Affiliation(s)
- Wei Wang
- Key Laboratory of Biomedical Analytics, Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China
| | - Jianye Gong
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University, Hohhot, 010021, China
| | - Jiaqiang Zhao
- Key Laboratory of Biomedical Analytics, Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China
| | - Hao Zhang
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Wei Wen
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, 510640, China
| | - Yan Jie Li
- Key Laboratory of Biomedical Analytics, Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China
| | - Jianguo Wang
- College of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Fine Organic Synthesis, Inner Mongolia University, Hohhot, 010021, China
| | - Cheng Zhi Huang
- Key Laboratory of Biomedical Analytics, Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China
| | - Peng Fei Gao
- Key Laboratory of Biomedical Analytics, Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China
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3
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Xu T, Wang JY, Wang Y, Jin S, Tang Y, Zhang S, Yuan Q, Liu H, Yan W, Jiao Y, Yang XL, Li G. C(sp)-C(sp) Lever-Based Targets of Orientational Chirality: Design and Asymmetric Synthesis. Molecules 2024; 29:2274. [PMID: 38792134 PMCID: PMC11123770 DOI: 10.3390/molecules29102274] [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: 04/15/2024] [Revised: 05/06/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
In this study, the design and asymmetric synthesis of a series of chiral targets of orientational chirality were conducted by taking advantage of N-sulfinylimine-assisted nucleophilic addition and modified Sonogashira catalytic coupling systems. Orientational isomers were controlled completely using alkynyl/alkynyl levers [C(sp)-C(sp) axis] with absolute configuration assignment determined by X-ray structural analysis. The key structural element of the resulting orientational chirality is uniquely characterized by remote through-space blocking. Forty examples of multi-step synthesis were performed, with modest to good yields and excellent orientational selectivity. Several chiral orientational amino targets are attached with scaffolds of natural and medicinal products, showing potential pharmaceutical and medical applications in the future.
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Affiliation(s)
- Ting Xu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; (T.X.); (Y.W.); (S.J.)
| | - Jia-Yin Wang
- Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, School of Pharmacy, Changzhou University, Changzhou 213164, China;
| | - Yu Wang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; (T.X.); (Y.W.); (S.J.)
| | - Shengzhou Jin
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; (T.X.); (Y.W.); (S.J.)
| | - Yao Tang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA; (Y.T.); (S.Z.); (Q.Y.); (H.L.)
| | - Sai Zhang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA; (Y.T.); (S.Z.); (Q.Y.); (H.L.)
| | - Qingkai Yuan
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA; (Y.T.); (S.Z.); (Q.Y.); (H.L.)
| | - Hao Liu
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA; (Y.T.); (S.Z.); (Q.Y.); (H.L.)
| | - Wenxin Yan
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecular, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; (W.Y.); (Y.J.)
| | - Yinchun Jiao
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecular, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China; (W.Y.); (Y.J.)
| | - Xiao-Liang Yang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; (T.X.); (Y.W.); (S.J.)
| | - Guigen Li
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China; (T.X.); (Y.W.); (S.J.)
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA; (Y.T.); (S.Z.); (Q.Y.); (H.L.)
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4
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Ashraf R, Zahoor AF, Ali KG, Nazeer U, Saif MJ, Mansha A, Chaudhry AR, Irfan A. Development of novel transition metal-catalyzed synthetic approaches for the synthesis of a dihydrobenzofuran nucleus: a review. RSC Adv 2024; 14:14539-14581. [PMID: 38708111 PMCID: PMC11066739 DOI: 10.1039/d4ra01830c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 04/16/2024] [Indexed: 05/07/2024] Open
Abstract
The synthesis of dihydrobenzofuran scaffolds bears pivotal significance in the field of medicinal chemistry and organic synthesis. These heterocyclic scaffolds hold immense prospects owing to their significant pharmaceutical applications as they are extensively employed as essential precursors for constructing complex organic frameworks. Their versatility and importance make them an interesting subject of study for researchers in the scientific community. While exploring their synthesis, researchers have unveiled various novel and efficient pathways for assembling the dihydrobenzofuran core. In the wake of extensive data being continuously reported each year, we have outlined the recent updates (post 2020) on novel methodological accomplishments employing the efficient catalytic role of several transition metals to forge dihydrobenzofuran functionalities.
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Affiliation(s)
- Rabia Ashraf
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Kulsoom Ghulam Ali
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Usman Nazeer
- Department of Chemistry, University of Houston 3585 Cullen Boulevard Texas 77204-5003 USA
| | - Muhammad Jawwad Saif
- Department of Applied Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Asim Mansha
- Department of Chemistry, Government College University Faisalabad 38000-Faisalabad Pakistan
| | - Aijaz Rasool Chaudhry
- Department of Physics, College of Science, University of Bisha P. O. Box 551 Bisha 61922 Saudi Arabia
| | - Ahmad Irfan
- Department of Chemistry, College of Science, King Khalid University P. O. Box 9004 Abha 61413 Saudi Arabia
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5
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Zhang S, Yuan Q, Li G. New multiple-layered 3D polymers showing aggregation-induced emission and polarization. RSC Adv 2024; 14:13342-13350. [PMID: 38660524 PMCID: PMC11040433 DOI: 10.1039/d4ra02128b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 04/18/2024] [Indexed: 04/26/2024] Open
Abstract
An exceptional achiral and chiral multilayer 3D polymer has been created and controlled by uniform and distinct aromatic chromophore units that are multiply sandwiched by naphthyl berths. In order to put together this assembly, it was necessary to search for new catalytic Suzuki-Miyaura polycouplings among various catalytic systems, monomers, and catalysts. Gel Permeation Chromatography (GPC) was able to verify the presence of many framework layers. The resulting achiral and chiral polymers displayed notable optical characteristic.
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Affiliation(s)
- Sai Zhang
- School of Pharmacy, Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University Changzhou Jiangsu 213164 China
| | - Qingkai Yuan
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
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6
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Yin X, Hsieh CY, Wang X, Wu Z, Ye Q, Bao H, Deng Y, Chen H, Luo P, Liu H, Hou T, Yao X. Enhancing Generic Reaction Yield Prediction through Reaction Condition-Based Contrastive Learning. RESEARCH (WASHINGTON, D.C.) 2024; 7:0292. [PMID: 38213662 PMCID: PMC10777739 DOI: 10.34133/research.0292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/06/2023] [Indexed: 01/13/2024]
Abstract
Deep learning (DL)-driven efficient synthesis planning may profoundly transform the paradigm for designing novel pharmaceuticals and materials. However, the progress of many DL-assisted synthesis planning (DASP) algorithms has suffered from the lack of reliable automated pathway evaluation tools. As a critical metric for evaluating chemical reactions, accurate prediction of reaction yields helps improve the practicality of DASP algorithms in the real-world scenarios. Currently, accurately predicting yields of interesting reactions still faces numerous challenges, mainly including the absence of high-quality generic reaction yield datasets and robust generic yield predictors. To compensate for the limitations of high-throughput yield datasets, we curated a generic reaction yield dataset containing 12 reaction categories and rich reaction condition information. Subsequently, by utilizing 2 pretraining tasks based on chemical reaction masked language modeling and contrastive learning, we proposed a powerful bidirectional encoder representations from transformers (BERT)-based reaction yield predictor named Egret. It achieved comparable or even superior performance to the best previous models on 4 benchmark datasets and established state-of-the-art performance on the newly curated dataset. We found that reaction-condition-based contrastive learning enhances the model's sensitivity to reaction conditions, and Egret is capable of capturing subtle differences between reactions involving identical reactants and products but different reaction conditions. Furthermore, we proposed a new scoring function that incorporated Egret into the evaluation of multistep synthesis routes. Test results showed that yield-incorporated scoring facilitated the prioritization of literature-supported high-yield reaction pathways for target molecules. In addition, through meta-learning strategy, we further improved the reliability of the model's prediction for reaction types with limited data and lower data quality. Our results suggest that Egret holds the potential to become an essential component of the next-generation DASP tools.
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Affiliation(s)
- Xiaodan Yin
- Dr. Neher’s Biophysics Laboratory for Innovative Drug Discovery, State Key Laboratory of Quality Research in Chinese Medicine,
Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao 999078, China
- CarbonSilicon AI Technology Co. Ltd, Hangzhou, Zhejiang 310018, China
| | - Chang-Yu Hsieh
- Innovation Institute for Artificial Intelligence in Medicine of Zhejiang University, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaorui Wang
- Dr. Neher’s Biophysics Laboratory for Innovative Drug Discovery, State Key Laboratory of Quality Research in Chinese Medicine,
Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao 999078, China
- CarbonSilicon AI Technology Co. Ltd, Hangzhou, Zhejiang 310018, China
| | - Zhenxing Wu
- Innovation Institute for Artificial Intelligence in Medicine of Zhejiang University, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- CarbonSilicon AI Technology Co. Ltd, Hangzhou, Zhejiang 310018, China
| | - Qing Ye
- Innovation Institute for Artificial Intelligence in Medicine of Zhejiang University, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
- CarbonSilicon AI Technology Co. Ltd, Hangzhou, Zhejiang 310018, China
| | - Honglei Bao
- Dr. Neher’s Biophysics Laboratory for Innovative Drug Discovery, State Key Laboratory of Quality Research in Chinese Medicine,
Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao 999078, China
| | - Yafeng Deng
- CarbonSilicon AI Technology Co. Ltd, Hangzhou, Zhejiang 310018, China
| | - Hongming Chen
- Center of Chemistry and Chemical Biology,
Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou 510530, China
| | - Pei Luo
- Dr. Neher’s Biophysics Laboratory for Innovative Drug Discovery, State Key Laboratory of Quality Research in Chinese Medicine,
Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macao 999078, China
| | - Huanxiang Liu
- Faculty of Applied Sciences,
Macao Polytechnic University, Macao 999078, China
| | - Tingjun Hou
- Innovation Institute for Artificial Intelligence in Medicine of Zhejiang University, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaojun Yao
- Faculty of Applied Sciences,
Macao Polytechnic University, Macao 999078, China
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7
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Tang Y, Yuan Q, Zhang S, Wang JY, Surowiec K, Li G. Enantioselective synthesis of [1,1'-binaphthalene]-8,8'-diyl bis(diphenylphosphane) and its derivatives. RSC Adv 2024; 14:2792-2795. [PMID: 38234866 PMCID: PMC10792274 DOI: 10.1039/d3ra07956b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/04/2024] [Indexed: 01/19/2024] Open
Abstract
Two 8,8' disubstituted binaphthyl ligands have been designed and synthesized in 3.1% and 11.4% overall yield, respectively. X-ray structure analysis demonstrated that a unique chiral microenvironment was created. With the assistance of a new aggregation-induced polarization (AIP) technology, chiral aggregates were determined as the fraction of polar solvent increased in the nonpolar/polar solvent system, which indicated their potential in modern asymmetric synthesis and catalysis.
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Affiliation(s)
- Yao Tang
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
| | - Qingkai Yuan
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
| | - Sai Zhang
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
| | - Jia-Yin Wang
- School of Pharmacy, Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University Changzhou Jiangsu 213164 China
| | - Kazimierz Surowiec
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University Lubbock Texas 79409-1061 USA
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8
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Zhang S, Chen D, Wang JY, Yan S, Li G. Four-layer folding framework: design, GAP synthesis, and aggregation-induced emission. Front Chem 2023; 11:1259609. [PMID: 37638105 PMCID: PMC10450629 DOI: 10.3389/fchem.2023.1259609] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 07/27/2023] [Indexed: 08/29/2023] Open
Abstract
The design and synthesis of a type of [1 + 4 + 2] four-layer framework have been conducted by taking advantage of Suzuki-Miyaura cross-coupling and group-assisted purification (GAP) chemistry. The optimized coupling of double-layer diboronic esters with 1-bromo-naphth-2-yl phosphine oxides resulted in a series of multilayer folding targets, showing a broad scope of substrates and moderate to excellent yields. The final products were purified using group-assisted purification chemistry/technology, achieved simply by washing crude products with 95% EtOH without the use of chromatography and recrystallization. The structures were fully characterized and assigned by performing X-ray crystallographic analysis. UV-vis absorption, photoluminescence (PL), and aggregation-induced emission (AIE) were studied for the resulting multilayer folding products.
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Affiliation(s)
- Sai Zhang
- Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu, China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
| | - Daixiang Chen
- Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu, China
| | - Jia-Yin Wang
- Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu, China
| | - Shenghu Yan
- Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu, China
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
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9
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Wang JY, Zhang S, Yuan Q, Li G, Yan S. Catalytic Radical-Triggered Annulation/Iododifluoromethylation of Enynones for the Stereospecific Synthesis of 1-Indenones. J Org Chem 2023. [PMID: 37220028 DOI: 10.1021/acs.joc.3c00471] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A new Pd(II)-catalyzed annulation/iododifluoromethylation of enynones has been developed for the synthesis of versatile 1-indanones with moderate to good yields (26 examples). The present strategy enabled the concomitant incorporation of two important difluoroalkyl and iodo functionalities into 1-indenone skeletons with (E)-stereoselectivity. The mechanistic pathway was proposed, consisting of the difluoroalkyl radical-triggered α,β-conjugated addition/5-exo-dig cyclization/metal radical cross-coupling/reductive elimination cascade.
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Affiliation(s)
- Jia-Yin Wang
- School of Pharmacy, Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Sai Zhang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Qingkai Yuan
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Shenghu Yan
- School of Pharmacy, Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu 213164, China
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10
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Jin S, Xu T, Tang Y, Wang JY, Wang Y, Pan J, Zhang S, Yuan Q, Rahman AU, Aquino AJA, Lischka H, Li G. A new chiral phenomenon of orientational chirality, its synthetic control and computational study. Front Chem 2023; 10:1110240. [PMID: 36688043 PMCID: PMC9850238 DOI: 10.3389/fchem.2022.1110240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 12/19/2022] [Indexed: 01/07/2023] Open
Abstract
A new type of chirality, orientational chirality, consisting of a tetrahedron center and a remotely anchored blocker, has been discovered. The key structural element of this chirality is characterized by multiple orientations directed by a through-space functional group. The multi-step synthesis of orientational chiral targets was conducted by taking advantage of asymmetric nucleophilic addition, Suzuki-Miyaura cross-coupling and Sonogashira coupling. An unprecedented catalytic species showing a five-membered ring consisting of C (sp2)-Br-Pd-C (sp2) bonds was isolated during performing Suzuki-Miyaura cross-coupling. X-ray diffraction analysis confirmed the species structure and absolute configuration of chiral orientation products. Based on X-ray structures, a model was proposed for the new chirality phenomenon to differentiate the present molecular framework from previous others. DFT computational study presented the relative stability of individual orientatiomers. This discovery would be anticipated to result in a new stereochemistry branch and to have a broad impact on chemical, biomedical, and material sciences in the future.
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Affiliation(s)
- Shengzhou Jin
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Ting Xu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Yao Tang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
| | - Jia-Yin Wang
- Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou University, Changzhou, Jiangsu, China
| | - Yu Wang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Junyi Pan
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China
| | - Sai Zhang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
| | - Qingkai Yuan
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
| | - Anis Ur Rahman
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
| | - Adelia J. A. Aquino
- Department of Mechanical Engineering, Texas Tech University, Lubbock, TX, United States
| | - Hans Lischka
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States,*Correspondence: Guigen Li, ; Hans Lischka,
| | - Guigen Li
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States,*Correspondence: Guigen Li, ; Hans Lischka,
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11
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Tang Y, Yuan Q, Wang Y, Zhang S, Wang JY, Jin S, Xu T, Pan J, Guilbeau CR, Pleasant AJ, Li G. Aggregation-induced polarization (AIP) of derivatives of BINOL and BINAP. RSC Adv 2022; 12:29813-29817. [PMID: 36321081 PMCID: PMC9578015 DOI: 10.1039/d2ra05597j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 10/04/2022] [Indexed: 11/17/2022] Open
Abstract
The relationship between optical rotations of small chiral molecules with water% in THF has been established. The typical aggregation co-solvent systems resulted in optical rotation amplification and adjustment, defined as aggregation-induced polarization (AIP). The AIP work can serve as a new tool to determine molecular aggregation, especially for those that cannot display aggregation-induced emission (AIE). Therefore, AIP and AIE are anticipated to complement each other. In addition, AIP can also serve as a new transmission tool providing adjusting right- or left-hand polarized lights of a series of individual wavelengths. Since chiral phosphine derivatives are among the most important ligands, this work would benefit research using chiral aggregates to control asymmetric synthesis and catalysts. Therefore, it will find many applications in chemical and materials sciences.
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Affiliation(s)
- Yao Tang
- Department of Chemistry and Biochemistry, Texas Tech UniversityLubbock 79409-1061TexasUSA
| | - Qingkai Yuan
- Department of Chemistry and Biochemistry, Texas Tech UniversityLubbock 79409-1061TexasUSA
| | - Yu Wang
- Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing UniversityNanjing210093China
| | - Sai Zhang
- Department of Chemistry and Biochemistry, Texas Tech UniversityLubbock 79409-1061TexasUSA
| | - Jia-Yin Wang
- Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing UniversityNanjing210093China,Continuous Flow Engineering Laboratory of National Petroleum and Chemical Industry, Changzhou UniversityChangzhouJiangsu 213164China
| | - Shengzhou Jin
- Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing UniversityNanjing210093China
| | - Ting Xu
- Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing UniversityNanjing210093China
| | - Junyi Pan
- Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing UniversityNanjing210093China
| | - Collin Ray Guilbeau
- Department of Chemistry and Biochemistry, Texas Tech UniversityLubbock 79409-1061TexasUSA
| | - Alyssa Jenae Pleasant
- Department of Chemistry and Biochemistry, Texas Tech UniversityLubbock 79409-1061TexasUSA
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech UniversityLubbock 79409-1061TexasUSA,Institute of Chemistry and BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing UniversityNanjing210093China
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