51
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Chen J, Jiang Z, Fukuzumi S, Nam W, Wang B. Artificial nonheme iron and manganese oxygenases for enantioselective olefin epoxidation and alkane hydroxylation reactions. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213443] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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52
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Abstract
This review concentrates on success stories from the synthesis of approved medicines and drug candidates using epoxide chemistry in the development of robust and efficient syntheses at large scale. The focus is on those parts of each synthesis related to the substrate-controlled/diastereoselective and catalytic asymmetric synthesis of epoxide intermediates and their subsequent ring-opening reactions with various nucleophiles. These are described in the form of case studies of high profile pharmaceuticals spanning a diverse range of indications and molecular scaffolds such as heterocycles, terpenes, steroids, peptidomimetics, alkaloids and main stream small molecules. Representative examples include, but are not limited to the antihypertensive diltiazem, the antidepressant reboxetine, the HIV protease inhibitors atazanavir and indinavir, efinaconazole and related triazole antifungals, tasimelteon for sleep disorders, the anticancer agent carfilzomib, the anticoagulant rivaroxaban the antibiotic linezolid and the antiviral oseltamivir. Emphasis is given on aspects of catalytic asymmetric epoxidation employing metals with chiral ligands particularly with the Sharpless and Jacobsen–Katsuki methods as well as organocatalysts such as the chiral ketones of Shi and Yang, Pages’s chiral iminium salts and typical chiral phase transfer agents.
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53
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54
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Influence of Epoxidized Cardanol Functionality and Reactivity on Network Formation and Properties. Polymers (Basel) 2020; 12:polym12091956. [PMID: 32872398 PMCID: PMC7563135 DOI: 10.3390/polym12091956] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 08/22/2020] [Accepted: 08/28/2020] [Indexed: 11/16/2022] Open
Abstract
Cardanol is a renewable resource based on cashew nut shell liquid (CNSL), which consists of a phenol ring with a C15 long aliphatic side chain in the meta position with varying degrees of unsaturation. Cardanol glycidyl ether was chemically modified to form side-chain epoxidized cardanol glycidyl ether (SCECGE) with an average epoxy functionality of 2.45 per molecule and was cured with petroleum-based epoxy hardeners, 4-4'-methylenebis(cyclohexanamine) and diethylenetriamine, and a cardanol-based amine hardener. For comparison, cardanol-based diphenol diepoxy resin, NC514 (Cardolite), and a petroleum-based epoxy resin, diglycidyl ether of bisphenol-A (DGEBA) were also evaluated. Chemical and thermomechanical analyses showed that for SCECGE resins, incomplete cure of the secondary epoxides led to reduced cross-link density, reduced thermal stability, and reduced elongation at break when compared with difunctional resins containing only primary epoxides. However, because of functionality greater than two, amine-cured SCECGE produced a Tg very similar to that of NC514 and thus could be useful in formulating epoxy with renewable cardanol content.
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55
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Zhang Y, Pan H, Liu W, Cao W, Feng X. Asymmetric Catalytic Synthesis of Epoxides via Three-Component Reaction of Diazoacetates, 2-Oxo-3-ynoates, and Nitrosoarenes. Org Lett 2020; 22:6744-6749. [DOI: 10.1021/acs.orglett.0c02108] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu Zhang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Hao Pan
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Wen Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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56
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Zheng L, Xia PJ, Zhao QL, Qian YE, Jiang WN, Xiang HY, Yang H. Photocatalytic Hydroacylation of Alkenes by Directly Using Acyl Oximes. J Org Chem 2020; 85:11989-11996. [DOI: 10.1021/acs.joc.0c01818] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Lan Zheng
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Peng-Ju Xia
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Qing-Lan Zhao
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Yu-En Qian
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | | | - Hao-Yue Xiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
| | - Hua Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
- Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, Central South University, Changsha 410083, P. R. China
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57
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Mairhofer C, Novacek J, Waser M. Synergistic Ammonium (Hypo)Iodite/Imine Catalysis for the Asymmetric α-Hydroxylation of β-Ketoesters. Org Lett 2020; 22:6138-6142. [PMID: 32706973 PMCID: PMC7418104 DOI: 10.1021/acs.orglett.0c02198] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Indexed: 12/14/2022]
Abstract
The synergistic use of chiral bifunctional ammonium iodide catalysts in combination with simple catalytically relevant aldimines allows for an unprecedented asymmetric α-hydroxylation reaction of β-ketoesters using H2O2. The reaction proceeds via in situ formation of a hypervalent iodine species, which then reacts with the used aldimine to generate an activated electrophilic oxygen transfer reagent.
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Affiliation(s)
- Christopher Mairhofer
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
| | | | - Mario Waser
- Institute of Organic Chemistry, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria
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58
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Pandey CB, Azaz T, Verma RS, Mishra M, Jat JL, Tiwari B. Stereoselective Oxidative Rearrangement of Disubstituted Unactivated Alkenes Using Hypervalent Iodine(III) Reagent. J Org Chem 2020; 85:10175-10181. [DOI: 10.1021/acs.joc.0c00347] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chandra Bhan Pandey
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Tazeen Azaz
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Ram Subhawan Verma
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Monika Mishra
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Jawahar L. Jat
- Department of Chemistry, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow 226025, India
| | - Bhoopendra Tiwari
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
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59
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Affiliation(s)
- Takahiro Sawano
- Department of Chemistry and Biological Science; Aoyama Gakuin University; 5-10-1 Fuchinobe, Chuo-ku 252-5258 Sagamihara Kanagawa Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center; Chubu University; 1200, Matsumoto-cho Kasugai Aichi 487-8501 Japan
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60
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Synthesis of Epoxides from Alkyl Bromides and Alcohols with in Situ Generation of Dimethyl Sulfonium Ylide in DMSO Oxidations. J Org Chem 2020; 85:537-547. [PMID: 31808693 DOI: 10.1021/acs.joc.9b02621] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Direct conversion of the readily available alkyl bromides and alcohols to value-added epoxides using dimethyl sulfoxide (DMSO) under mild reaction conditions has been developed. Benzyl and allyl bromides, and activated and unactivated alcohols all proceeded smoothly to give epoxides in high to excellent yield. Dimethyl sulfide, generated by DMSO oxidations, was in situ elaborated to form the substituted dimethyl sulfonium ylide species that participates in the Corey-Chaykovsky epoxidation in a domino and one-pot fashion, respectively.
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61
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Multidimensional CuII incorporated POMs [KI2CuII(en)2(β-Mo8O26)]n and [KI2CuII3(H2O)10(W12O40)0.2(H2O)]n: Syntheses, structures and catalytic epoxidation. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114204] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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62
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Wu W, Xu S, Zhang Y, Wang X, Li R, Sun F, Yu C, Li T, Wei D, Yao C. NHC-catalyzed β-specific addition of N-based nucleophiles to allenoates. Org Chem Front 2020. [DOI: 10.1039/d0qo00189a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
N-heterocyclic carbene (NHC) catalyzed reactions of nitrogenous heterocycles or trifluoromethylated acylhydrazone with allenoates gave regiospecific β-adducts. DFT calculations rationalized the origination of regio- and E/Z selectivities.
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63
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Das A, Bhaumik A, Pathak T. Epoxides of d-fructose and l-sorbose: A convenient class of "click" functionality for the synthesis of a rare family of amino- and thio-sugars. Carbohydr Res 2019; 487:107870. [PMID: 31783289 DOI: 10.1016/j.carres.2019.107870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/06/2019] [Accepted: 11/06/2019] [Indexed: 12/28/2022]
Abstract
The strained epoxide ring of oxirane-derived furanoside and pyranoside of d-fructose are regioselectively opened by various primary and secondary amines as well as azide to yield C4-alkylamino-C4-deoxy and the corresponding azido derivatives. The epoxide ring of a furanoside derived from l-sorbose, a C-5 epimer of d-fructose also afforded C4-amino and C4-azido analogues. All three epoxides generated piperazine linked disaccharides. These epoxides are also easily opened by p-tolylthiol to access thiosugars. One such thiosugar was converted to vinylsulfone-modified fructofuranoside and subjected to nucleophillic addition. A suitably designed vinyl sulfone-modified fructofuranoside having a leaving group at C-6, act as an efficient substrate for MIRC (Michael Initiated Ring Closure) reactions to construct cyclopropane skeleton in d-fructose. The strategy is general in nature and provides an easy access to cyclopropanated sugar derivatives. Thus, the easily accessible "spring loaded" epoxides of d-fructose and l-sorbose have been used as pivotal starting point for the synthesis of hitherto unknown modified carbohydrates.
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Affiliation(s)
- Ashrukana Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, West Bengal, India
| | - Atanu Bhaumik
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, West Bengal, India
| | - Tanmaya Pathak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, West Bengal, India.
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64
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Li C, Cao YX, Jin RX, Bian KJ, Qin ZY, Lan Q, Wang XS. Highly stereoselective nickel-catalyzed difluoroalkylation of aryl ketones to tetrasubstituted monofluoroalkenes and quaternary alkyl difluorides. Chem Sci 2019; 10:9285-9291. [PMID: 32055314 PMCID: PMC7003883 DOI: 10.1039/c9sc02806d] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/17/2019] [Indexed: 12/19/2022] Open
Abstract
A nickel-catalyzed difluoroalkylation of α-C-H bonds of aryl ketones to furnish highly stereo-defined tetrasubstituted monofluoroalkenes or quaternary alkyl difluorides from secondary or tertiary ketones, respectively, has been established. Mechanistic investigations indicated that these C-H fluoroalkylations proceed via a Ni(i)/Ni(iii) catalytic cycle. An obvious fluorine effect was observed in the reaction, and this reaction has demonstrated high stereoselectivity, mild conditions, and broad substrate scopes, thus enabling the late-stage fluoroalkylation of bioactive molecules. This method offers a solution for expedient construction of monofluoroalkenes from readily available materials, and provides an efficient approach for the synthesis of bioactive fluorinated compounds for the discovery of lead compounds in medicinal chemistry.
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Affiliation(s)
- Chao Li
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Yi-Xuan Cao
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Kang-Jie Bian
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Zi-Yang Qin
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Quan Lan
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale , Department of Chemistry , Center for Excellence in Molecular Synthesis of CAS , University of Science and Technology of China , Hefei , Anhui 230026 , China .
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65
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Fordham JM, Grayson MN, Aggarwal VK. Vinylidene Homologation of Boronic Esters and its Application to the Synthesis of the Proposed Structure of Machillene. Angew Chem Int Ed Engl 2019; 58:15268-15272. [PMID: 31365776 DOI: 10.1002/anie.201907617] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/30/2019] [Indexed: 01/20/2023]
Abstract
Alkenyl boronic esters are important reagents in organic synthesis. Herein, we report that these valuable products can be accessed by the homologation of boronic esters with lithiated epoxysilanes. Aliphatic and electron-rich aromatic boronic esters provided vinylidene boronic esters in moderate to high yields, while electron-deficient aromatic and vinyl boronic esters were found to give the corresponding vinyl silane products. Through DFT calculations, this divergence in mechanistic pathway has been rationalized by considering the stabilization of negative charge in the C-Si and C-B bond breaking transition states. This vinylidene homologation was used in a short six-step stereoselective synthesis of the proposed structure of machillene, however, synthetic and reported data were found to be inconsistent.
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Affiliation(s)
- James M Fordham
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Matthew N Grayson
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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66
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Ai C, Zhu F, Wang Y, Yan Z, Lin S. SO 2F 2-Mediated Epoxidation of Olefins with Hydrogen Peroxide. J Org Chem 2019; 84:11928-11934. [PMID: 31436983 DOI: 10.1021/acs.joc.9b01784] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An inexpensive, mild, and highly efficient epoxidation protocol has been developed involving bubbling SO2F2 gas into a solution of olefin, 30% aqueous hydrogen peroxide, and 4 N aqueous potassium carbonate in 1,4-dioxane at room temperature for 1 h with the formation of the corresponding epoxides in good to excellent yields. The novel SO2F2/H2O2/K2CO3 epoxidizing system is suitable to a variety of olefinic substrates including electron-rich and electron-deficient ones.
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Affiliation(s)
- Chengmei Ai
- College of Chemistry , Nanchang University, Nanchang 330031 , P. R. China
| | - Fuyuan Zhu
- College of Chemistry , Nanchang University, Nanchang 330031 , P. R. China
| | - Yanmei Wang
- College of Chemistry , Nanchang University, Nanchang 330031 , P. R. China
| | - Zhaohua Yan
- College of Chemistry , Nanchang University, Nanchang 330031 , P. R. China
| | - Sen Lin
- College of Chemistry , Nanchang University, Nanchang 330031 , P. R. China
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67
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Fordham JM, Grayson MN, Aggarwal VK. Vinylidene Homologation of Boronic Esters and its Application to the Synthesis of the Proposed Structure of Machillene. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907617] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- James M. Fordham
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Matthew N. Grayson
- Department of Chemistry University of Bath Claverton Down Bath BA2 7AY UK
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68
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Gao S, Chen M. α-Silicon effect assisted Curtin-Hammett allylation using allylcopper reagents derived from 1,3-dienylsilanes. Chem Sci 2019; 10:7554-7560. [PMID: 31489170 PMCID: PMC6713862 DOI: 10.1039/c9sc02905b] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 06/18/2019] [Indexed: 12/31/2022] Open
Abstract
Cu-catalyzed stereoselective synthesis of (E)-δ-silyl-anti-homoallylic alcohols from 1,3-dienylsilane was developed. Mechanistic studies revealed that the borocupration of dienylsilane proceeded through a 1,2-addition pathway to give an allylcopper intermediate with Cu distal to the silyl group. However, the subsequent aldehyde allylation proceeded via Curtin-Hammett control to give (E)-δ-silyl-anti-homoallylic alcohols with high diastereoselectivities. This method was applied to the synthesis of the C1-9 fragment of a polyketide natural product, mycinolide IV.
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Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry , Auburn University , Auburn , AL 36849 , USA .
| | - Ming Chen
- Department of Chemistry and Biochemistry , Auburn University , Auburn , AL 36849 , USA .
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69
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Shu W, García-Domínguez A, Quirós MT, Mondal R, Cárdenas DJ, Nevado C. Ni-Catalyzed Reductive Dicarbofunctionalization of Nonactivated Alkenes: Scope and Mechanistic Insights. J Am Chem Soc 2019; 141:13812-13821. [DOI: 10.1021/jacs.9b02973] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Wei Shu
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich CH 8057, Switzerland
| | - Andrés García-Domínguez
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich CH 8057, Switzerland
| | - M. Teresa Quirós
- Departamento de Química Orgánica, Facultad de Ciencias, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Cantoblanco CP 28049, Madrid, Spain
| | - Rahul Mondal
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich CH 8057, Switzerland
| | - Diego J. Cárdenas
- Departamento de Química Orgánica, Facultad de Ciencias, Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Cantoblanco CP 28049, Madrid, Spain
| | - Cristina Nevado
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich CH 8057, Switzerland
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70
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Fan LF, Wang TC, Wang PS, Gong LZ. Palladium-Catalyzed Asymmetric Allylic C–H Alkylation of 1,4-Dienes with Cyclic β-Keto Esters. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00363] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Lian-Feng Fan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Tian-Ci Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Pu-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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71
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Zhu B, Shen T, Huang X, Zhu Y, Song S, Jiao N. Selective Aerobic Oxygenation of Tertiary Allylic Alcohols with Molecular Oxygen. Angew Chem Int Ed Engl 2019; 58:11028-11032. [DOI: 10.1002/anie.201903690] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/30/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Bencong Zhu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Tao Shen
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Xiaoqiang Huang
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
- State Key Laboratory of Organometallic ChemistryChinese Academy of Sciences Shanghai 200032 China
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72
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Cots E, Flores A, Romero RM, Muñiz K. A Practical Aryliodine(I/III) Catalysis for the Vicinal Diamination of Styrenes. CHEMSUSCHEM 2019; 12:3028-3031. [PMID: 30803150 DOI: 10.1002/cssc.201900360] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 02/22/2019] [Indexed: 06/09/2023]
Abstract
2,6-Disubstituted iodoarenes bearing amide-functionalized side arms are reported as new structures in redox-active iodine(I/III) catalysis. In combination with bis-sulfonimides as nitrogen sources and 3-chloroperbenzoic acid (mCPBA) as benign terminal oxidant they catalyze the vicinal diamination of styrenes. The obtained reactivity and selectivity outperform other iodoarene catalyst candidates. This protocol provides a sustainable alternative to previous related protocols for diamination that are based on stoichiometric iodine(III) reagents.
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Affiliation(s)
- Eric Cots
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Andrea Flores
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - R Martín Romero
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
- ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
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73
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Nishikawa K, Morita K, Hashimoto S, Hoshino A, Ikeuchi T, Kumagai M, Morimoto Y. Critical Switching of Cyclization Modes of Polyepoxides in Acidic Aqueous Media and Neutral Water: Synthesis and Revised Structure of a Nerolidol-Type Sesquiterpenoid. Angew Chem Int Ed Engl 2019; 58:10168-10172. [PMID: 31211481 DOI: 10.1002/anie.201906039] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Indexed: 11/12/2022]
Abstract
Biomimetic epoxide-opening cascades of polyepoxides enable the efficient and rapid construction of polyether frameworks. Herein, we show that the epoxide-opening cascade cyclization that affords tetrahydrofuran products in acidic aqueous media produces tetrahydropyran (THP) in neutral water. THP formation proceeded by simply heating polyepoxides in neutral water and followed a different cyclization mode from those observed so far. The novel cascade cyclization in H2 O was applied to the synthesis of a new nerolidol-type sesquiterpenoid, resulting in revision of the proposed structure and determination of the absolute configuration.
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Affiliation(s)
- Keisuke Nishikawa
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Kengo Morita
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Subaru Hashimoto
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Akihiro Hoshino
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Takumi Ikeuchi
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Momochika Kumagai
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan.,Japan Food Research Laboratories, Ibaraki-shi, Osaka, 567-0085, Japan
| | - Yoshiki Morimoto
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, 558-8585, Japan
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74
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Nishikawa K, Morita K, Hashimoto S, Hoshino A, Ikeuchi T, Kumagai M, Morimoto Y. Critical Switching of Cyclization Modes of Polyepoxides in Acidic Aqueous Media and Neutral Water: Synthesis and Revised Structure of a Nerolidol‐Type Sesquiterpenoid. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Keisuke Nishikawa
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Kengo Morita
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Subaru Hashimoto
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Akihiro Hoshino
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Takumi Ikeuchi
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
| | - Momochika Kumagai
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
- Japan Food Research Laboratories Ibaraki-shi Osaka 567-0085 Japan
| | - Yoshiki Morimoto
- Department of ChemistryGraduate School of ScienceOsaka City University Sumiyoshi-ku Osaka 558-8585 Japan
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75
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Rapi Z, Nemcsok T, Bagi P, Keglevich G, Bakó P. Synthesis of chiral crown ethers derived from d-galactose and their application in enantioselective reactions. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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76
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Zhu B, Shen T, Huang X, Zhu Y, Song S, Jiao N. Selective Aerobic Oxygenation of Tertiary Allylic Alcohols with Molecular Oxygen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903690] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bencong Zhu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Tao Shen
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Xiaoqiang Huang
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Song Song
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
- State Key Laboratory of Organometallic ChemistryChinese Academy of Sciences Shanghai 200032 China
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77
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78
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Electrochemical Oxidative Csp
3
—H/S—H Cross‐Coupling with Hydrogen Evolution for Synthesis of Tetrasubstituted Olefins. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900113] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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79
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Clarasó C, Vicens L, Polo A, Costas M. Enantioselective Epoxidation of β,β-Disubstituted Enamides with a Manganese Catalyst and Aqueous Hydrogen Peroxide. Org Lett 2019; 21:2430-2435. [PMID: 30883137 DOI: 10.1021/acs.orglett.9b00729] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Enantioselective epoxidation of β,β-disubstituted enamides with aqueous hydrogen peroxide and a novel manganese catalyst is described. Epoxidation is stereospecific and proceeds fast under mild conditions. Amides are disclosed as key functional groups to enable high enantioselectivity.
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Affiliation(s)
- Carlota Clarasó
- Department de Química , Universitat de Girona . Campus de Montilivi, E-17003 Girona , Catalonia , Spain.,Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , E-17003 Girona , Catalonia , Spain
| | - Laia Vicens
- Department de Química , Universitat de Girona . Campus de Montilivi, E-17003 Girona , Catalonia , Spain.,Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , E-17003 Girona , Catalonia , Spain
| | - Alfonso Polo
- Department de Química , Universitat de Girona . Campus de Montilivi, E-17003 Girona , Catalonia , Spain
| | - Miquel Costas
- Department de Química , Universitat de Girona . Campus de Montilivi, E-17003 Girona , Catalonia , Spain.,Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , E-17003 Girona , Catalonia , Spain
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80
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Kobayashi T, Takizawa I, Shinobe A, Kawamoto Y, Abe H, Ito H. Asymmetric Synthesis and Structure Revision of Guignardone H and I: Development of a Chiral 1,3-Diketone Possessing C2 Symmetry. Org Lett 2019; 21:3008-3012. [DOI: 10.1021/acs.orglett.9b00486] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Toyoharu Kobayashi
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Iori Takizawa
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Ayumu Shinobe
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Yuichiro Kawamoto
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Hideki Abe
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women’s University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan
| | - Hisanaka Ito
- School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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81
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Sawano T, Yamamoto H. Enantioselective Epoxidation of β,γ-Unsaturated Carboxylic Acids by a Cooperative Binuclear Titanium Complex. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00840] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Takahiro Sawano
- Molecular Catalyst Research Center, Chubu University, 1200, Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200, Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
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82
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Wang Q, Gu Q, You SL. Enantioselective Carbonyl Catalysis Enabled by Chiral Aldehydes. Angew Chem Int Ed Engl 2019; 58:6818-6825. [PMID: 30216640 DOI: 10.1002/anie.201808700] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Indexed: 12/16/2022]
Abstract
Organocatalytic methods have achieved spectacular advancements for the preparation of chiral molecules in highly enantioenriched forms. The fast development of this field can mainly be attributed to the evolution of general and reliable activation modes. The discovery and identification of new activation modes are therefore highly desirable to push the boundaries of asymmetric reactions. In this Minireview, recent advances in enantioselective carbonyl catalysis, one useful subbranch of organocatalysis for the efficient activation of simple amines, will be summarized. With elegantly designed chiral aldehyde catalysts, highly enantioselective and efficient asymmetric reactions can be developed. Continued development of enantioselective carbonyl catalysis is expected in the future.
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Affiliation(s)
- Qiang Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Qing Gu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China.,Collaborative Innovation Center of Chemical Science, and Engineering, Tianjin, China
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83
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Wang Q, Gu Q, You S. Enantioselective Carbonyl Catalysis Enabled by Chiral Aldehydes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201808700] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiang Wang
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Qing Gu
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Shu‐Li You
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
- Collaborative Innovation Center of Chemical Science, and Engineering Tianjin China
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84
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Wang H, Guo C. Enantioselective γ‐Addition of Pyrazole and Imidazole Heterocycles to Allenoates Catalyzed by Chiral Phosphine. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813381] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Haiyang Wang
- Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of China Hefei 230026 China
| | - Chang Guo
- Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of China Hefei 230026 China
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85
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Wang H, Guo C. Enantioselective γ‐Addition of Pyrazole and Imidazole Heterocycles to Allenoates Catalyzed by Chiral Phosphine. Angew Chem Int Ed Engl 2019; 58:2854-2858. [DOI: 10.1002/anie.201813381] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/28/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Haiyang Wang
- Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of China Hefei 230026 China
| | - Chang Guo
- Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of China Hefei 230026 China
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86
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Palladium nanoparticles supported on UiO-66-NH2 as heterogeneous catalyst for epoxidation of styrene. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2018.12.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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87
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Wu S, Zhou Y, Li Z. Biocatalytic selective functionalisation of alkenes via single-step and one-pot multi-step reactions. Chem Commun (Camb) 2019; 55:883-896. [PMID: 30566124 DOI: 10.1039/c8cc07828a] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Alkenes are excellent starting materials for organic synthesis due to the versatile reactivity of C[double bond, length as m-dash]C bonds and the easy availability of many unfunctionalised alkenes. Direct regio- and/or enantioselective conversion of alkenes into functionalised (chiral) compounds has enormous potential for industrial applications, and thus has attracted the attention of researchers for extensive development using chemo-catalysis over the past few years. On the other hand, many enzymes have also been employed for conversion of alkenes in a highly selective and much greener manner to offer valuable products. Herein, we review recent advances in seven well-known types of biocatalytic conversion of alkenes. Remarkably, recent mechanism-guided directed evolution and enzyme cascades have enabled the development of seven novel types of single-step and one-pot multi-step functionalisation of alkenes, some of which are even unattainable via chemo-catalysis. These new reactions are particularly highlighted in this feature article. Overall, we present an ever-expanding enzyme toolbox for various alkene functionalisations inspiring further research in this fast-developing theme.
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Affiliation(s)
- Shuke Wu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585.
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88
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Zhao JJ, Zhang HH, Shen X, Yu S. Enantioselective Radical Hydroacylation of Enals with α-Ketoacids Enabled by Photoredox/Amine Cocatalysis. Org Lett 2019; 21:913-916. [DOI: 10.1021/acs.orglett.8b03840] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jia-Jia Zhao
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hong-Hao Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xu Shen
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shouyun Yu
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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89
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Bulman Page PC, Almutairi SM, Chan Y, Stephenson GR, Gama Y, Goodyear RL, Douteau A, Allin SM, Jones GA. Asymmetric Oxidation of Enol Derivatives to α-Alkoxy Carbonyls Using Iminium Salt Catalysts: A Synthetic and Computational Study. J Org Chem 2019; 84:544-559. [PMID: 30548068 DOI: 10.1021/acs.joc.8b02354] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We report herein the first examples of asymmetric oxidation of enol ether and ester substrates using iminium salt organocatalysis, affording moderate to excellent enantioselectivities of up to 98% ee for tetralone-derived substrates in the α-hydroxyketone products. A comprehensive density functional theory study was undertaken to interpret the competing diastereoisomeric transition states in this example in order to identify the origins of enantioselectivity. The calculations, performed at the B3LYP/6-31G(D) level of theory, gave good agreement with the experimental results, in terms of the magnitude of the effects under the specified reaction conditions, and in terms of the preferential formation of the ( R)-enantiomer. Just one of the 30 characterized transition states dominates the enantioselectivity, which is attributed to the adoption of an orientation relative to stereochemical features of the chiral controlling element that combines a CH-π interaction between a CH2 group in the substrate and one of the aromatic rings of the biaryl section of the chiral auxiliary with a good alignment of the acetoxy group with the other biaryl ring, and places the smallest substituent on the alkene (a hydrogen atom) in the most sterically hindered position.
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Affiliation(s)
- Philip C Bulman Page
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - Saud M Almutairi
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - Yohan Chan
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - G Richard Stephenson
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - Yannick Gama
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - Ross L Goodyear
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - Alice Douteau
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
| | - Steven M Allin
- Department of Chemistry and Forensics , Nottingham Trent University , Clifton , Nottingham NG11 8NS , U.K
| | - Garth A Jones
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich , Norfolk NR4 7TJ , U.K
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90
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Puleo TR, Strong AJ, Bandar JS. Catalytic α-Selective Deuteration of Styrene Derivatives. J Am Chem Soc 2019; 141:1467-1472. [PMID: 30625273 DOI: 10.1021/jacs.8b12874] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We report an operationally simple protocol for the catalytic α-deuteration of styrenes. This process proceeds via the base-catalyzed reversible addition of methanol to styrenes in DMSO -d6 solvent. The concentration of methanol is shown to be critical for high yields and selectivities over multiple competing side reactions. The synthetic utility of α-deuterated styrenes for accessing deuterium-labeled chiral benzylic stereocenters is demonstrated.
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Affiliation(s)
- Thomas R Puleo
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Alivia J Strong
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
| | - Jeffrey S Bandar
- Department of Chemistry , Colorado State University , Fort Collins , Colorado 80523 , United States
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91
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Mitra M, Cusso O, Bhat SS, Sun M, Cianfanelli M, Costas M, Nordlander E. Highly enantioselective epoxidation of olefins by H2O2 catalyzed by a non-heme Fe(ii) catalyst of a chiral tetradentate ligand. Dalton Trans 2019; 48:6123-6131. [DOI: 10.1039/c8dt04449j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new chiral Fe(ii)-complex mediates the asymmetric epoxidation of prochiral olefins with good enantioselectivity.
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Affiliation(s)
- Mainak Mitra
- Chemical Physics
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | | | - Satish S. Bhat
- Chemical Physics
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | - Mingzhe Sun
- Chemical Physics
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
| | | | | | - Ebbe Nordlander
- Chemical Physics
- Department of Chemistry
- Lund University
- SE-221 00 Lund
- Sweden
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92
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Lu J, Ma X, Wang P, Feng J, Ma P, Niu J, Wang J. Synthesis, characterization and catalytic epoxidation properties of a new tellurotungstate(iv)-supported rhenium carbonyl derivative. Dalton Trans 2019; 48:628-634. [DOI: 10.1039/c8dt04195d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We synthesized a new tellurotungstate(iv)-supported rhenium carbonyl derivative, Na2H2[(CH3)4N]6[Te2W20O70{Re(CO)3}2]·20H2O (1). Additionally, compound 1 showed excellent catalytic activity in the selective epoxidation of alkenes under comparatively mild reaction conditions.
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Affiliation(s)
- Jingkun Lu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Xinyi Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Ping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Junwei Feng
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
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93
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Zhou Y, He W, Fang Z, Guo K. Continuous Synthesis of Cyclohexene Oxide in a Micro-FlowSystem. ChemistrySelect 2018. [DOI: 10.1002/slct.201803038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Zhou
- School of Pharmaceutical Science; Nanjing Tech University; No. 30 Puzhu South Road Nanjing China
| | - Wei He
- College of biotechnology and Pharmaceutical Engineering Nanjing Tech University; No. 30 Puzhu South Road Nanjing China
| | - Zheng Fang
- College of biotechnology and Pharmaceutical Engineering Nanjing Tech University; No. 30 Puzhu South Road Nanjing China
| | - Kai Guo
- College of biotechnology and Pharmaceutical Engineering Nanjing Tech University; No. 30 Puzhu South Road Nanjing China
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University; Nanjing 211816 P.R. China
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94
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Mohammadian R, Karimi Alavijeh M, Kamyar N, Amini MM, Shaabani A. Metal–organic frameworks as a new platform for molecular oxygen and aerobic oxidation of organic substrates: Recent advances. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.09.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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95
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Blanc A, Perrin DM. Synthesis of 3a-hydroxyhexahydropyrrolo[2,3-B]Indole-2-carboxamide, an oxidation product of tryptophan present in natural products. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Antoine Blanc
- Department of Chemistry; University of British Columbia; Vancouver V6T 1Z1 Canada
| | - David M. Perrin
- Department of Chemistry; University of British Columbia; Vancouver V6T 1Z1 Canada
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96
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Flores A, Cots E, Bergès J, Muñiz K. Enantioselective Iodine(I/III) Catalysis in Organic Synthesis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800521] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Andrea Flores
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science Av. Països Catalans 16 43007 Tarragona Spain
| | - Eric Cots
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science Av. Països Catalans 16 43007 Tarragona Spain
| | - Julien Bergès
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science Av. Països Catalans 16 43007 Tarragona Spain
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science Av. Països Catalans 16 43007 Tarragona Spain
- ICREA Passeig Lluís Companys 23 08010 Barcelona Spain
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97
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Li R, Liu F, Dong G. Palladium-catalyzed asymmetric annulation between aryl iodides and racemic epoxides using a chiral norbornene cocatalyst. Org Chem Front 2018; 5:3108-3112. [PMID: 31745430 DOI: 10.1039/c8qo00808f] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein, we describe our initial development of an asymmetric Pd-catalyzed annulation between aryl iodides and racemic epoxides for synthesis of 2,3-dihydrobenzofurans using a chiral norbornene cocatalyst. A series of enantiopure ester-, amide- and imide-substituted norbornenes have been prepared with a reliable synthetic route. Promising enantioselectivity (42-45% ee) has been observed using the isopropyl ester-substituted norbornene (N1*) and the amide-substituted norbornene (N7*).
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Affiliation(s)
- Renhe Li
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA.
| | - Feipeng Liu
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA. .,Department of Applied Chemistry, China Agricultural University, 2 West Yuanmingyuan Road, Beijing 100193, China
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, USA.
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98
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Yang B, Ren X, Shen X, Li T, Lu Z. Visible Light-Promoted Three-Component Carboazidation of Unactivated Alkenes with TMSN3
and Acrylonitrile. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800320] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bo Yang
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Xiang Ren
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Xuzhong Shen
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Tongtong Li
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
| | - Zhan Lu
- Department of Chemistry; Zhejiang University; Hangzhou 310058 China
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99
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Yamashita Y, Macor JA, Fushimi S, Tsubogo T, Kobayashi S. Chiral Calcium-Catalyzed Asymmetric Epoxidation Reactions Using Hydrogen Peroxide as the Terminal Oxidant. Chem Pharm Bull (Tokyo) 2018; 66:847-850. [PMID: 30175740 DOI: 10.1248/cpb.c18-00485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Asymmetric epoxidation reactions of chalcone derivatives catalyzed by chiral calcium complexes using hydrogen peroxide were developed. The epoxidation reactions proceeded smoothly to afford the desired products in good yields with good enantioselectivities. This is the first example of chiral calcium-catalyzed asymmetric epoxidation reactions using hydrogen peroxide as the terminal oxidant.
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Affiliation(s)
| | | | - Seiya Fushimi
- Department of Chemistry, School of Science, The University of Tokyo
| | - Tetsu Tsubogo
- Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo
| | - Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo.,Green & Sustainable Chemistry Cooperation Laboratory, Graduate School of Science, The University of Tokyo
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100
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Lee Y, Choi J, Kim H. Stereocontrolled, Divergent, Al(lll)-Catalyzed Coupling of Chiral N-Aryl Epoxy Amines and CO2. Org Lett 2018; 20:5036-5039. [DOI: 10.1021/acs.orglett.8b02186] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuseop Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Jonghoon Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Hyunwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
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