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Zhang CH, Gao Q, Li M, Wang JF, Yu CM, Mao B. Kinetic Resolution of Tertiary Allylic Alcohols: Highly Enantioselective Access to Cyclic Ethers Bearing an α-Tetrasubstituted Stereocenter. Org Lett 2021; 23:3949-3954. [DOI: 10.1021/acs.orglett.1c01110] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chao-Huan Zhang
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Qing Gao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Meng Li
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jian-Fei Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Chuan-Ming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Bin Mao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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2
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Jana S, Yang Z, Pei C, Xu X, Koenigs RM. Photochemical ring expansion reactions: synthesis of tetrahydrofuran derivatives and mechanism studies. Chem Sci 2019; 10:10129-10134. [PMID: 32015819 PMCID: PMC6968735 DOI: 10.1039/c9sc04069b] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 09/05/2019] [Indexed: 01/15/2023] Open
Abstract
We have shown light mediated ring-expansion reactions of 4-membered ring heterocycles. The reaction proceeds via a diradical mechanism and bond length play a key role in the stereodetermining step.
The reaction mechanism of oxygen and sulfur ylide mediated rearrangements is even today a matter of debate. In this report, we describe ring expansion reactions of oxetane and thietane heterocycles that allow probing the underlying reaction mechanism under metal-free, photochemical conditions. This ring expansion proves highly efficient and allows the synthesis of tetrahydrofuran and thiolane heterocycles under mild and operationally simple reaction conditions. These studies reveal marked differences in the stereoselectivity of the ring expansion of oxygen or sulfur ylides, which were further investigated computationally. DFT calculations show that carbenes react under ylide formation and that the corresponding ring expansion reactions proceed via a diradical pathway. The different bond lengths in free oxygen or sulfur ylide intermediates cause the distinctive stereochemical outcome.
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Affiliation(s)
- Sripati Jana
- RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany .
| | - Zhen Yang
- RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany .
| | - Chao Pei
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science , Suzhou 215123 , China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry, Chemical Engineering and Materials Science , Suzhou 215123 , China.,Guangdong Key Laboratory of Chiral Molecule and Drug Discovery , School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China .
| | - Rene M Koenigs
- RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany .
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3
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Lee S, Bae HY, List B. Can a Ketone Be More Reactive than an Aldehyde? Catalytic Asymmetric Synthesis of Substituted Tetrahydrofurans. Angew Chem Int Ed Engl 2018; 57:12162-12166. [PMID: 30126072 DOI: 10.1002/anie.201806312] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 11/06/2022]
Abstract
O-heterocycles bearing tetrasubstituted stereogenic centers are prepared via catalytic chemo- and enantioselective nucleophilic additions to ketoaldehydes, in which the ketone reacts preferentially over the aldehyde. Five- and six-membered rings with both aromatic and aliphatic substituents, as well as an alkynyl substituent, are obtained. Moreover, 2,2,5-trisubstituted and 2,2,5,5-tetrasubstituted tetrahydrofurans are synthesized with excellent stereoselectivities. Additionally, the synthetic utility of the described method is demonstrated with a three-step synthesis of the side chain of anhydroharringtonine.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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Lee S, Bae HY, List B. Kann ein Keton reaktiver als ein Aldehyd sein? Katalytische asymmetrische Synthese von substituierten Tetrahydrofuranen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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He FS, Cen X, Yang S, Zhang J, Xia H, Wu J. Intramolecular oxysulfonylation of alkenes with the insertion of sulfur dioxide under photocatalysis. Org Chem Front 2018. [DOI: 10.1039/c8qo00528a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Intramolecular oxysulfonylation of alkenes with the insertion of sulfur dioxide promoted by visible light is developed, leading to sulfonated tetrahydrofurans and related compounds in moderate to good yields.
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Affiliation(s)
- Fu-Sheng He
- Department of Biochemistry & Research Center of Clinical Pharmacy of The First Affiliated Hospital
- Zhejiang University School of Medicine
- Hangzhou 310058
- China
| | - Xufeng Cen
- Department of Biochemistry & Research Center of Clinical Pharmacy of The First Affiliated Hospital
- Zhejiang University School of Medicine
- Hangzhou 310058
- China
| | - Shuying Yang
- Department of Biochemistry & Research Center of Clinical Pharmacy of The First Affiliated Hospital
- Zhejiang University School of Medicine
- Hangzhou 310058
- China
| | - Jun Zhang
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
| | - Hongguang Xia
- Department of Biochemistry & Research Center of Clinical Pharmacy of The First Affiliated Hospital
- Zhejiang University School of Medicine
- Hangzhou 310058
- China
| | - Jie Wu
- Department of Chemistry
- Fudan University
- Shanghai 200438
- China
- State Key Laboratory of Organometallic Chemistry
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6
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Gieuw MH, Ke Z, Yeung YY. Lewis Base Catalyzed Stereo- and Regioselective Bromocyclization. CHEM REC 2016; 17:287-311. [PMID: 27701807 DOI: 10.1002/tcr.201600088] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Indexed: 01/01/2023]
Abstract
Oxygen- and nitrogen-containing heterocyclic compounds are widely recognized as key components in many natural products and biologically relevant molecules, but often the problem comes down to methodologies in synthesizing them. Halocyclization of olefinic substrates is a promising strategy in the construction of O- and N-heterocyclic compounds, which further signifies the development of their asymmetric variants. Over the past years, our group has been devoted to this particular area of asymmetric electrophilic halocyclization with chalcogen-containing molecules as catalysts. In this account, the main focus is on the development of our novel chiral catalysts and applications derived from the reaction products.
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Affiliation(s)
- Matthew H Gieuw
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR China
| | - Zhihai Ke
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR China
| | - Ying-Yeung Yeung
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, SAR China
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7
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Krishnan KK, Thankachan AP, Anilkumar G. Recent advances and perspectives in the synthesis of heterocycles via carbenes. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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8
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Tan CK, Yu WZ, Yeung YY. Stereoselective Bromofunctionalization of Alkenes. Chirality 2013; 26:328-43. [DOI: 10.1002/chir.22272] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 10/10/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Chong Kiat Tan
- Department of Chemistry; National University of Singapore; Singapore
| | | | - Ying-Yeung Yeung
- Department of Chemistry; National University of Singapore; Singapore
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9
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Soni A, Rehman A, Naik K, Dastidar S, Alam M, Ray A, Chaira T, Shah V, Palle VP, Cliffe IA, Sattigeri VJ. Synthesis and evaluation of 4,5-dihydro-5-methylisoxazolin-5-carboxamide derivatives as VLA-4 antagonists. Bioorg Med Chem Lett 2013; 23:1482-5. [DOI: 10.1016/j.bmcl.2012.12.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 12/12/2012] [Accepted: 12/14/2012] [Indexed: 11/24/2022]
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Modeling the molecular basis for α4β1 integrin antagonism. Bioorg Med Chem 2011; 19:5903-11. [PMID: 21889349 DOI: 10.1016/j.bmc.2011.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 07/29/2011] [Accepted: 08/05/2011] [Indexed: 11/23/2022]
Abstract
We report a 3D QSAR study of almost 300 structurally diverse small molecule antagonists of the integrin α4β1 whose biological activity spans six orders of magnitude. The alignment of the molecules was based on the conformation of a structurally related ligand bound to the αIIBβ3 and αvβ3 integrins in X-ray crystallographic studies. The molecular field method, CoMSIA, was used to generate the 3D QSAR models. The resulting models showed that the lipophilic properties were the most important, with hydrogen bond donor and steric properties less relevant. The models were highly significant (r(2)=0.89, q2(LOO)=0.67, r(2) (test set)=0.76), and could make robust predictions of the data (SEE=0.46, SEP=0.78, SEP (test set)=0.66). We predicted the antagonist activities of a further ten compounds with useful accuracy. The model appears capable of predicting α4β1 integrin antagonist activity to within a factor of five for compounds within its domain of applicability. The implications for design of improved integrin antagonists will be discussed.
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Zhou L, Tan CK, Jiang X, Chen F, Yeung YY. Asymmetric bromolactonization using amino-thiocarbamate catalyst. J Am Chem Soc 2011; 132:15474-6. [PMID: 20945837 DOI: 10.1021/ja1048972] [Citation(s) in RCA: 287] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel amino-thiocarbamate-catalyzed bromolactonization of unsaturated carboxylic acids has been developed. The scope of the reaction is evidenced by 22 examples of γ-lactones with up to 99% yield and 93% ee. The protocol was applied in the enantioselective synthesis of the key intermediates of VLA-4 antagonists.
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Affiliation(s)
- Ling Zhou
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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12
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Gong Y, Kent Barbay J, Kimball ES, Santulli RJ, Carolyn Fisher M, Dyatkin AB, Miskowski TA, Hornby PJ, He W. Synthesis and SAR of pyridazinone-substituted phenylalanine amide α4 integrin antagonists. Bioorg Med Chem Lett 2008; 18:1331-5. [DOI: 10.1016/j.bmcl.2008.01.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Accepted: 01/07/2008] [Indexed: 10/22/2022]
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Lassoie MA, Broeders F, Collart P, Defrère L, de Laveleye-Defais F, Demaude T, Gassama A, Guillaumet G, Hayez JC, Kiss L, Knerr L, Nicolas JM, Norsikian S, Quéré L, Routier S, Verbois V, Provins L. 2,6-Quinolinyl derivatives as potent VLA-4 antagonists. Bioorg Med Chem Lett 2007; 17:142-6. [PMID: 17035017 DOI: 10.1016/j.bmcl.2006.09.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2006] [Revised: 09/22/2006] [Accepted: 09/23/2006] [Indexed: 10/24/2022]
Abstract
A new series of 2,6-quinolinyl derivatives was prepared leading to potent low nanomolar VLA-4/VCAM-1 antagonists.
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15
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Abstract
Circulating lymphocytes normally migrate through extravascular spaces in relatively low numbers as important members of the immunosurveillance process. That is until signals are received by endothelial cells that there is an underlying infection or inflammatory condition. These vascular surface cells in turn overexpress and present ligands to circulating lymphocyte adhesion molecules. Upon encountering this higher density of ligands, lymphocytes, which had been leisurely rolling along the vascular surface, now become more firmly attached, change shape, and migrate through tight junctions to the sites of infection or inflammation. If the initiating events are not resolved and the condition becomes chronic, there can be a sustained extravasation of lymphocytes that can exacerbate the inflammatory condition, which in turn will continue to recruit more inflammatory cells resulting in unwanted tissue destruction. It is for the attenuation of this cycle of sustained inflammatory cell recruitment that very late activating antigen-4 (VLA-4) antagonists are being developed. Most lymphocytes, except neutrophils, express VLA-4 on their surface and they interact with endothelial vascular cell adhesion molecule-1 (VCAM-1). It is this interaction that VLA-4 antagonists are intended to disrupt, thus, putting an end to the cycle of chronic inflammation, which is the hallmark of many diseases. This review will provide an update of VLA-4 antagonists that have appeared since early 2001 and will discuss some of the issues, both positive and negative, that may be encountered in their development.
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Affiliation(s)
- Ginger X Yang
- Merck Research Laboratories, Rahway, New Jersey 07090, USA.
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