1
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Karmakar A, Yu PC, Shajan FJ, Chatare VK, Sabbers WA, Sproviero EM, Andrade RB. Diastereoselective Hydroxylation of N- tert-Butanesulfinyl Imines with 2-(Phenylsulfonyl)-3-phenyloxaziridine (Davis Oxaziridine). Org Lett 2022; 24:6548-6553. [PMID: 36044766 DOI: 10.1021/acs.orglett.2c02513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The diastereoselective α-hydroxylation of N-tert-butanesulfinyl metallodienenamine and metalloenamines with Davis oxaziridine affords α-hydroxy N-sulfinyl imines with 50-88% yield and up to 98:2 diastereomeric ratio. Dramatic changes in diastereoselectivity and stereoselectivity were observed by choice of metal bases. The mechanistic understanding for the switch in diastereoselectivity was assisted by DFT computational modeling, which suggests the facial approach is governed by aza-enolate geometry. A one-pot protocol for the asymmetric synthesis of 1,2-amino alcohols is described.
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Affiliation(s)
- Anupam Karmakar
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Po-Cheng Yu
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Femil J Shajan
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Vijay K Chatare
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - William A Sabbers
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Eduardo M Sproviero
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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2
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Mendes JA, Costa PRR, Yus M, Foubelo F, Buarque CD. N- tert-Butanesulfinyl imines in the asymmetric synthesis of nitrogen-containing heterocycles. Beilstein J Org Chem 2021; 17:1096-1140. [PMID: 34093879 PMCID: PMC8144919 DOI: 10.3762/bjoc.17.86] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 04/22/2021] [Indexed: 02/05/2023] Open
Abstract
The synthesis of nitrogen-containing heterocycles, including natural alkaloids and other compounds presenting different types of biological activities have proved to be successful employing chiral sulfinyl imines derived from tert-butanesulfinamide. These imines are versatile chiral auxiliaries and have been extensively used as eletrophiles in a wide range of reactions. The electron-withdrawing sulfinyl group facilitates the nucleophilic addition of organometallic compounds to the iminic carbon with high diastereoisomeric excess and the free amines obtained after an easy removal of the tert-butanesulfinyl group can be transformed into enantioenriched nitrogen-containing heterocycles. The goal of this review is to the highlight enantioselective syntheses of heterocycles involving the use of chiral N-tert-butanesulfinyl imines as reaction intermediates, including the synthesis of several natural products. The synthesis of nitrogen-containing heterocycles in which the nitrogen atom is not provided by the chiral imine will not be considered in this review. The sections are organized according to the size of the heterocycles. The present work will comprehensively cover the most pertinent contributions to this research area from 2012 to 2020. We regret in advance that some contributions are excluded in order to maintain a concise format.
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Affiliation(s)
- Joseane A Mendes
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Puc-Rio, CEP 22435-900, Brazil
| | - Paulo R R Costa
- Laboratory of Bioorganic Chemistry, Institute of Research of Natural Products, Health Science Center, Federal University of Rio de Janeiro UFRJ, CEP 21941-590, Brazil
| | - Miguel Yus
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo.99, 03080 Alicante, Spain
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99,03080 Alicante, Spain
- Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Francisco Foubelo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Alicante, Apdo.99, 03080 Alicante, Spain
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Alicante, Apdo. 99,03080 Alicante, Spain
- Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - Camilla D Buarque
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Puc-Rio, CEP 22435-900, Brazil
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3
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Voelz VA, Ge Y, Raddi RM. Reconciling Simulations and Experiments With BICePs: A Review. Front Mol Biosci 2021; 8:661520. [PMID: 34046431 PMCID: PMC8144449 DOI: 10.3389/fmolb.2021.661520] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 04/12/2021] [Indexed: 02/04/2023] Open
Abstract
Bayesian Inference of Conformational Populations (BICePs) is an algorithm developed to reconcile simulated ensembles with sparse experimental measurements. The Bayesian framework of BICePs enables population reweighting as a post-simulation processing step, with several advantages over existing methods, including the proper use of reference potentials, and the estimation of a Bayes factor-like quantity called the BICePs score for model selection. Here, we summarize the theory underlying this method in context with related algorithms, review the history of BICePs applications to date, and discuss current shortcomings along with future plans for improvement.
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Affiliation(s)
- Vincent A. Voelz
- Department of Chemistry, Temple University, Philadelphia, PA, United States
| | - Yunhui Ge
- Department of Pharmaceutical Sciences, University of California, Irvine, Irvine, CA, United States
| | - Robert M. Raddi
- Department of Chemistry, Temple University, Philadelphia, PA, United States
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4
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Li A, Wang T, Tian Q, Yang X, Yin D, Qin Y, Zhang L. Single-Point Mutant Inverts the Stereoselectivity of a Carbonyl Reductase toward β-Ketoesters with Enhanced Activity. Chemistry 2021; 27:6283-6294. [PMID: 33475219 DOI: 10.1002/chem.202005195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 12/29/2020] [Indexed: 01/06/2023]
Abstract
Enzyme stereoselectivity control is still a major challenge. To gain insight into the molecular basis of enzyme stereo-recognition and expand the source of antiPrelog carbonyl reductase toward β-ketoesters, rational enzyme design aiming at stereoselectivity inversion was performed. The designed variant Q139G switched the enzyme stereoselectivity toward β-ketoesters from Prelog to antiPrelog, providing corresponding alcohols in high enantiomeric purity (89.1-99.1 % ee). More importantly, the well-known trade-off between stereoselectivity and activity was not found. Q139G exhibited higher catalytic activity than the wildtype enzyme, the enhancement of the catalytic efficiency (kcat /Km ) varied from 1.1- to 27.1-fold. Interestingly, the mutant Q139G did not lead to reversed stereoselectivity toward aromatic ketones. Analysis of enzyme-substrate complexes showed that the structural flexibility of β-ketoesters and a newly formed cave together facilitated the formation of the antiPrelog-preferred conformation. In contrast, the relatively large and rigid structure of the aromatic ketones prevents them from forming the antiPrelog-preferred conformation.
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Affiliation(s)
- Aipeng Li
- School of Life Sciences, Northwestern Polytechnical University, 710072, Xi'an, China.,Research & Development Institute in Shenzhen, Northwestern Polytechnical University, 518057, Shenzhen, China
| | - Ting Wang
- School of Life Sciences, Northwestern Polytechnical University, 710072, Xi'an, China.,Research & Development Institute in Shenzhen, Northwestern Polytechnical University, 518057, Shenzhen, China
| | - Qing Tian
- School of Life Sciences, Northwestern Polytechnical University, 710072, Xi'an, China.,Research & Development Institute in Shenzhen, Northwestern Polytechnical University, 518057, Shenzhen, China
| | - Xiaohong Yang
- Department of Chemistry, University of California, One Shields Avenue, Davis, California, 95616, United States
| | - Dongming Yin
- School of Life Sciences, Northwestern Polytechnical University, 710072, Xi'an, China.,Research & Development Institute in Shenzhen, Northwestern Polytechnical University, 518057, Shenzhen, China
| | - Yong Qin
- School of Life Sciences, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Lianbing Zhang
- School of Life Sciences, Northwestern Polytechnical University, 710072, Xi'an, China.,Research & Development Institute in Shenzhen, Northwestern Polytechnical University, 518057, Shenzhen, China
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5
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Scherzi T, D'Ambrosio EA, Daher SS, Grimes CL, Dunman PM, Andrade RB. Staphylococcus aureus resistance to albocycline can be achieved by mutations that alter cellular NAD/PH pools. Bioorg Med Chem 2021; 32:115995. [PMID: 33477021 PMCID: PMC7891091 DOI: 10.1016/j.bmc.2021.115995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/31/2020] [Indexed: 11/21/2022]
Abstract
Small molecule target identification is a critical step in modern antibacterial drug discovery, particularly against multi-drug resistant pathogens. Albocycline (ALB) is a macrolactone natural product with potent activity against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant S. aureus (VRSA) whose mechanism of action has been elusive to date. Herein, we report biochemical and genomic studies that reveal ALB does not target bacterial peptidoglycan biosynthesis or the ribosome; rather, it appears to modulate NADPH ratios and upregulate redox sensing in the cell consistent with previous studies at Upjohn. Owing to the complexity inherent in biological pathways, further genomic assays are needed to identify the true molecular target(s) of albocycline.
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Affiliation(s)
- Tyler Scherzi
- Department of Microbiology and Immunology, University of Rochester, School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Elizabeth A D'Ambrosio
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Samer S Daher
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Catherine L Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Paul M Dunman
- Department of Microbiology and Immunology, University of Rochester, School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States.
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6
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Daher SS, Franklin KP, Scherzi T, Dunman PM, Andrade RB. Synthesis and biological evaluation of semi-synthetic albocycline analogs. Bioorg Med Chem Lett 2020; 30:127509. [PMID: 32827630 DOI: 10.1016/j.bmcl.2020.127509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 12/18/2022]
Abstract
Albocycline (ALB) is a unique macrolactone natural product with potent, narrow-spectrum activity against methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-intermediate (VISA), and vancomycin-resistant S. aureus (VRSA) strains (MIC = 0.5-1.0 μg/mL). Described herein is the synthesis and evaluation of a novel series analogs derived from albocycline by functionalization at three specific sites: the C2-C3 enone, the tertiary carbinol at C4, and the allylic C16 methyl group. Exploration of the structure-activity relationships (SAR) by means of minimum inhibitory concentration assays (MICs) revealed that C4 ester analog 6 was twice as potent as ALB, which represents a class of lead compound that can be further studied to address multi-drug resistant pathogens.
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Affiliation(s)
- Samer S Daher
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Kevin P Franklin
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Tyler Scherzi
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Paul M Dunman
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States.
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7
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Ikeuchi K, Murasawa K, Arai T, Yamada H. p-Methylbenzyl 2,2,2-Trichloroacetimidate: Simple Preparation and Application to Alcohol Protection. CHEM LETT 2020. [DOI: 10.1246/cl.200303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazutada Ikeuchi
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Kentaro Murasawa
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Tomoki Arai
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Hidetsohi Yamada
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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8
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Improvement of primary-amine-catalyzed asymmetric α-benzoyloxylation of α-branched enals by a synergistic effect of water and sulfonic acids. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Yu PC, Chatare VK, Patel H, DeBrosse C, Andrade RB. The vinylogous aldol reaction of N-Sulfinyl metallodienamines. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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10
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2017. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Appa RM, Lakshmidevi J, Prasad SS, Naidu BR, Narasimhulu M, Venkateswarlu K. HClO 4
⋅SiO 2
-Catalyzed Mechanochemical Protocol: An Effective, Economical and Eco-friendly Preparation of N
-( tert
-butylsulfinyl)imines. ChemistrySelect 2018. [DOI: 10.1002/slct.201802497] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Rama Moorthy Appa
- Laboratory for Synthetic and Natural Products Chemistry; Department of Chemistry; Yogi Vemana University; Kadapa 516 005 India
| | - Jangam Lakshmidevi
- Laboratory for Synthetic and Natural Products Chemistry; Department of Chemistry; Yogi Vemana University; Kadapa 516 005 India
| | - S. Siva Prasad
- Laboratory for Synthetic and Natural Products Chemistry; Department of Chemistry; Yogi Vemana University; Kadapa 516 005 India
| | - Bandameeda Ramesh Naidu
- Laboratory for Synthetic and Natural Products Chemistry; Department of Chemistry; Yogi Vemana University; Kadapa 516 005 India
| | - Manchala Narasimhulu
- Laboratory for Synthetic and Natural Products Chemistry; Department of Chemistry; Yogi Vemana University; Kadapa 516 005 India
| | - Katta Venkateswarlu
- Laboratory for Synthetic and Natural Products Chemistry; Department of Chemistry; Yogi Vemana University; Kadapa 516 005 India
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12
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Hassan HMA. A Short and Efficient Total Synthesis of Ficuseptamines A and B. Molecules 2018; 23:molecules23081865. [PMID: 30050011 PMCID: PMC6222897 DOI: 10.3390/molecules23081865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 07/21/2018] [Accepted: 07/23/2018] [Indexed: 11/16/2022] Open
Abstract
A rapid and efficient total synthesis of ficuseptamines A and B by a cross metathesis strategy is described.
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Affiliation(s)
- Hani Mutlak A Hassan
- King Fahd Medical Research Center, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia.
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13
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Liang H, Zhou G, Ge Y, D'Ambrosio EA, Eidem TM, Blanchard C, Shehatou C, Chatare VK, Dunman PM, Valentine AM, Voelz VA, Grimes CL, Andrade RB. Elucidating the inhibition of peptidoglycan biosynthesis in Staphylococcus aureus by albocycline, a macrolactone isolated from Streptomyces maizeus. Bioorg Med Chem 2018; 26:3453-3460. [PMID: 29805074 PMCID: PMC6008248 DOI: 10.1016/j.bmc.2018.05.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 05/02/2018] [Accepted: 05/12/2018] [Indexed: 02/01/2023]
Abstract
Antibiotic resistance is a serious threat to global public health, and methicillin-resistant Staphylococcus aureus (MRSA) is a poignant example. The macrolactone natural product albocycline, derived from various Streptomyces strains, was recently identified as a promising antibiotic candidate for the treatment of both MRSA and vancomycin-resistant S. aureus (VRSA), which is another clinically relevant and antibiotic resistant strain. Moreover, it was hypothesized that albocycline's antimicrobial activity was derived from the inhibition of peptidoglycan (i.e., bacterial cell wall) biosynthesis. Herein, preliminary mechanistic studies are performed to test the hypothesis that albocycline inhibits MurA, the enzyme that catalyzes the first step of peptidoglycan biosynthesis, using a combination of biological assays alongside molecular modeling and simulation studies. Computational modeling suggests albocycline exists as two conformations in solution, and computational docking of these conformations to an ensemble of simulated receptor structures correctly predicted preferential binding to S. aureus MurA-the enzyme that catalyzes the first step of peptidoglycan biosynthesis-over Escherichia coli (E. coli) MurA. Albocycline isolated from the producing organism (Streptomyces maizeus) weakly inhibited S. aureus MurA (IC50 of 480 μM) but did not inhibit E. coli MurA. The antimicrobial activity of albocycline against resistant S. aureus strains was superior to that of vancomycin, preferentially inhibiting Gram-positive organisms. Albocycline was not toxic to human HepG2 cells in MTT assays. While these studies demonstrate that albocycline is a promising lead candidate against resistant S. aureus, taken together they suggest that MurA is not the primary target, and further work is necessary to identify the major biological target.
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Affiliation(s)
- Hai Liang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Guangfeng Zhou
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Yunhui Ge
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Elizabeth A D'Ambrosio
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Tess M Eidem
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Catlyn Blanchard
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Cindy Shehatou
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Vijay K Chatare
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Paul M Dunman
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Ann M Valentine
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Vincent A Voelz
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States
| | - Catherine L Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, PA 19122, United States.
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14
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Song C, Yang C, Zeng H, Zhang W, Guo S, Zhu J. Rh(III)-Catalyzed Enaminone-Directed C–H Coupling with α-Diazo-α-phosphonoacetate for Reactivity Discovery: Fluoride-Mediated Dephosphonation for C–C Coupling Reactions. Org Lett 2018; 20:3819-3823. [DOI: 10.1021/acs.orglett.8b01406] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chao Song
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Chen Yang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Hua Zeng
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Wenjing Zhang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Shan Guo
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Jin Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
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15
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Elsherbini M, Wirth T. Mechanochemical synthesis of N-tert-butanesulfinyl imines under metal-free conditions. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.11.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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16
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Davis FA. Recent applications of N-sulfonyloxaziridines (Davis oxaziridines) in organic synthesis. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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17
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Qin S, Liu S, Cao Y, Li J, Chong C, Liu T, Luo Y, Hu J, Jiang S, Zhou H, Yang G, Yang C. α-Alkylation of Chiral Sulfinimines for Constructing Quaternary Chiral Carbons by Introducing Removable Directing Groups. Org Lett 2018; 20:1350-1354. [PMID: 29446637 DOI: 10.1021/acs.orglett.8b00105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study developed a facile and efficient synthetic strategy to construct quaternary chiral centers at the α-position of imines and ketones. High regioselectivity and diastereoselectivity were achieved through the synergetic effect of electron-withdrawing directing groups and N-tert-butyl sulfinamide as chiral auxiliaries. Either of them could be removed under the optimized conditions without any epimerization.
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Affiliation(s)
- Shuanglin Qin
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China.,School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Shuangwei Liu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Yuting Cao
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Jiangnan Li
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China.,School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Chuanke Chong
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Tongtong Liu
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Yunhao Luo
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Jiyun Hu
- School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Shende Jiang
- School of Pharmaceutical Science and Technology, Tianjin University , Tianjin 300072, People's Republic of China
| | - Honggang Zhou
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Guang Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
| | - Cheng Yang
- The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University , Tianjin 300350, People's Republic of China
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