1
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Karan G, Sahu S, Metya A, Maji MS. Asymmetric 1,2-Migration at Vicinal Tetrasubstituted Stereocenters Constructed from α-Keto Imines. Angew Chem Int Ed Engl 2024:e202405212. [PMID: 38721919 DOI: 10.1002/anie.202405212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Indexed: 06/21/2024]
Abstract
A carbonyl-assisted asymmetric 1,2-migratory allylation through in situ generation of vicinal tetrasubstituted stereocenters is reported to access enantiopure α-amino ketones and amino alcohols with excellent yields and diastereoselectivities. In a remarkable divergence, despite higher steric hindrance, the allylation exclusively occurs on ketones over imines in the first step, followed by a face-selective 1,2-allyl transfer, thus highlighting an exciting interplay between two distinct electrophiles. The methodology distinguishes itself through its adaptability to gram-scale synthesis, showcasing broad functional-group tolerance and stereodivergence. Density functional theory (DFT) analysis led to a deeper understanding of its selectivity and mechanistic framework. Highlighting its transformative potential, the method was applied to the total synthesis of hapalindole alkaloids.
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Affiliation(s)
- Ganesh Karan
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Samrat Sahu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Abhisek Metya
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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2
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Pian J, Zhao Z, Zhao Y, He L, Liu XL, Li Y, Li SW. Asymmetric Synthesis of Tertiary α-Hydroxylation-Cyclopentanones via Synergetic Catalysis of Chiral-at-Metal Rhodium(III) Complexes/Pyrrolidine. J Org Chem 2023. [PMID: 38154059 DOI: 10.1021/acs.joc.3c01931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Catalytic and asymmetric domino Michael/aldol reaction of 1,2-dicarbonyl compounds with α,β-unsaturated ketones under the synergetic catalysis of chiral-at-metal rhodium complexes and pyrrolidine to deliver tertiary α-hydroxylation-cyclopentanones (45-89% yields with 81-99% ee and up to >20:1 dr) bearing three contiguous stereogenic centers had been established. Moreover, the scalability and practical utility of this protocol were well demonstrated by employing a gram-scale reaction and some representative transformations.
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Affiliation(s)
- Jixin Pian
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China
| | - Zhifei Zhao
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China
| | - Yujie Zhao
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China
| | - Lin He
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China
| | - Xiong-Li Liu
- National & Local Joint Engineering Research Center for the Exploition of Homology Resources of Southwest Medicine and Food, Guizhou University, Guiyang, Guizhou 550025, P. R. China
| | - Yongsheng Li
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China
| | - Shi-Wu Li
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Xinjiang, Shihezi 832003, China
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3
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Hoogesteger RH, Murdoch N, Cordes DB, Johnston CP. Cobalt-Catalyzed Wagner-Meerwein Rearrangements with Concomitant Nucleophilic Hydrofluorination. Angew Chem Int Ed Engl 2023; 62:e202308048. [PMID: 37409777 DOI: 10.1002/anie.202308048] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/07/2023]
Abstract
We report a cobalt-catalyzed Wagner-Meerwein rearrangement of gem-disubstituted allylarenes that generates fluoroalkane products with isolated yields up to 84 %. Modification of the counteranion of the N-fluoropyridinium oxidant suggests the substrates undergo nucleophilic fluorination during the reaction. Subjecting the substrates to other known metal-mediated hydrofluorination procedures did not lead to observable 1,2-aryl migration. Thus, indicating the unique ability of these cobalt-catalyzed conditions to generate a sufficiently reactive electrophilic intermediate capable of promoting this Wagner-Meerwein rearrangement.
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Affiliation(s)
- Reece H Hoogesteger
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Nicola Murdoch
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Craig P Johnston
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
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4
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Huang ZY, Yang H, Jiang ZY, Zhou L, Li QH, Zhao ZG. In(OTf)3 catalyzed regioselective acyloin rearrangement of 1-acyl-1-indanols. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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5
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Nie XK, Chen Y, Zhang SQ, Cui X, Tang Z, Li GX. Chiral Primary Amine Catalyzed Enantioselective Tandem Reactions Based on Heyns Rearrangement: Synthesis of α-Tertiary Amino Ketones. Org Lett 2022; 24:2069-2074. [PMID: 35261250 DOI: 10.1021/acs.orglett.2c00724] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we disclose a new catalytic asymmetric tandem reaction based on the Heyns rearrangement for the synthesis of chiral α-amino ketones with readily available substrates. The rearrangement is different from the Heyns rearrangement in that the α-amino ketones were obtained without the shift of the carbonyl group. The key to success is using chiral primary amine as a catalyst by mimicking glucosamine-6-phosphate synthase in catalyzing the efficient Heyns rearrangement in organisms.
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Affiliation(s)
- Xiao-Kang Nie
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China.,University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
| | - Yue Chen
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Shi-Qi Zhang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Xin Cui
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Zhuo Tang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Guang-Xun Li
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
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6
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Luo X, Zhang D, Luo Q, Huang K, Liu X, Yang N, Qin Z, Feng C, Li J. Structure identification and analysis of the suspected chemical precursor of 2-fluorodeschloroketamine and its decomposition products. Drug Test Anal 2022; 14:1065-1078. [PMID: 35088572 DOI: 10.1002/dta.3229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 11/09/2022]
Abstract
In this work, 1-[(2"-fluorophenyl)(methylimino) methyl]cyclopentan-1-ol (2-fluorodeschlorohydroxylimine) was identified as a suspected chemical precursor of 2-fluorodeschloroketamine (2-FDCK) using GC-MS and GC-Q/TOF-MS and comparing the data with those of ketamine and its chemical precursor, hydroxylimine. Furthermore, the entire fragmentation pathway of 2-fluorodeschlorohydroxylimine was theorized from the GC-MS spectrum recorded using an electron ionization (EI) source, and the mechanisms and decomposition pathways of 2-fluorodeschlorohydroxylimine were elucidated. In protic solvents, the nitrogen atom in the C=N group of 2-fluorodeschlorohydroxylimine underwent a protonation reaction. Thereafter, the traces of water present in protic solvents promoted the hydrolysis of the protonated imine, and a carbon cation was obtained following the loss of methylamine. The carbon cation could follow the classical decomposition mechanism of imines and yield an α-hydroxyl ketone, which was the major decomposition product, (2'-fluorophenyl)(1"-hydroxycyclopentyl) methanone. The cation could also undergo a loop expansion rearrangement and yield another α-hydroxyl ketone, 2-(2'-fluorophenyl)-2-hydroxycyclohexan-1-one. The structures of the two aforementioned decomposition products were elucidated using several techniques including theoretical calculation, GC-MS, NMR, the prediction and assistance elucidation functions of ACDLabs-Structure Elucidator Suite, and the virtual separation technology of diffusion-ordered spectroscopy. The aforementioned study revealed important information about the chemical precursor of 2-FDCK and its decomposition. Furthermore, a set of methods for the qualitative analysis of 2-fluorodeschlorohydroxylimine was established, which facilitated accurate analysis of 2-fluorodeschlorohydroxylimine samples following decomposition or destruction.
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Affiliation(s)
- Xuan Luo
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P. R. China.,Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Guangxi University, Nanning, Guangxi, P. R. China
| | - Di Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P. R. China
| | - Qiulian Luo
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P. R. China
| | - Kejian Huang
- Institute of Forensic Science, Public Security Department of Guangxi, Nanning, Guangxi, P. R. China
| | - Xiaofeng Liu
- Institute of Forensic Science, Public Security Department of Guangxi, Nanning, Guangxi, P. R. China
| | - Ning Yang
- Institute of Forensic Science, Public Security Department of Guangxi, Nanning, Guangxi, P. R. China
| | - Zuzeng Qin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P. R. China
| | - Chunli Feng
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P. R. China
| | - Junbo Li
- Anti-drug detachment, Public Security Bureau of Nanning, Nanning, Guangxi, P. R. China
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7
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Zhang MC, Wang DC, Qu GR, Guo HM. Catalytic Asymmetric Synthesis of Chiral Thiohydantoins via Domino Cyclization Reaction of β,γ-Unsaturated α-Ketoester and N,N'-Dialkylthiourea. Org Chem Front 2022. [DOI: 10.1039/d2qo00669c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first catalytic asymmetric route to synthesize chiral thiohydantoins containing a quaternary stereogenic center has been established utilizing a chiral phosphoric acid-catalyzed domino cyclization reaction of N,N'-dialkyl thioureas with β,γ-unsaturated...
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8
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Dai L, Liu W, Zhou Y, Zeng Z, Hu X, Cao W, Feng X. Catalytic Asymmetric Halogenation/Semipinacol Rearrangement of 3-Hydroxyl-3-vinyl Oxindoles: A Stereodivergent Kinetic Resolution Process. Angew Chem Int Ed Engl 2021; 60:26599-26603. [PMID: 34669225 DOI: 10.1002/anie.202110315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/15/2021] [Indexed: 01/05/2023]
Abstract
A highly enantioselective halogenation/semipinacol rearrangement of isatin-derived allylic alcohols has been developed with a chiral N,N'-dioxide/ScIII complex as catalyst. This strategy involved a pivotal stereodivergent kinetic resolution process and provided a facile and efficient entry to optically active halo-substituted quinolone derivatives and quinoline alkaloids with a quaternary stereocenter simultaneously under mild reaction conditions. Based on the control experiments together with kinetic studies and DFT calculations, a possible catalytic cycle was proposed to illustrate the reaction process and enantiocontrol.
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Affiliation(s)
- Li Dai
- 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
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Zi Zeng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xinyue Hu
- 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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9
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Dai L, Liu W, Zhou Y, Zeng Z, Hu X, Cao W, Feng X. Catalytic Asymmetric Halogenation/Semipinacol Rearrangement of 3‐Hydroxyl‐3‐vinyl Oxindoles: A Stereodivergent Kinetic Resolution Process. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202110315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Li Dai
- 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
| | - Yuqiao Zhou
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry, Sichuan University Chengdu 610064 China
| | - Zi Zeng
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry, Sichuan University Chengdu 610064 China
| | - Xinyue Hu
- 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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10
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Benz S, Murkin AS. α-Ketol and α-iminol rearrangements in synthetic organic and biosynthetic reactions. Beilstein J Org Chem 2021; 17:2570-2584. [PMID: 34760025 PMCID: PMC8551875 DOI: 10.3762/bjoc.17.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/07/2021] [Indexed: 11/24/2022] Open
Abstract
In the presence of a suitable acid or base, α-hydroxyaldehydes, ketones, and imines can undergo isomerization that features the 1,2-shift of an alkyl or aryl group. In the process, the hydroxy group is converted to a carbonyl and the aldehyde/ketone or imine is converted to an alcohol or amine. Such α-ketol/α-iminol rearrangements are used in a wide variety of synthetic applications including asymmetric synthesis, tandem reactions, and the total synthesis and biosynthesis of natural products. This review explores the use of α-ketol rearrangements in these contexts over the past two decades.
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Affiliation(s)
- Scott Benz
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
| | - Andrew S Murkin
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, United States
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11
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Yang F, Xu S, Fan H, Zhao X, Zhang X. One‐Pot Synthesis of 2‐Aminobenzophenones from 2‐Alkynyl Arylazides Catalyzed by Pd and Cu Precursors. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fan Yang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Shijie Xu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Hui Fan
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xuechun Zhao
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xiaoxiang Zhang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering Nanjing Forestry University Nanjing 210037 People's Republic of China
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12
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He YP, Wu H, Wang Q, Zhu J. Catalytic Enantioselective Synthesis of Morpholinones Enabled by Aza-Benzilic Ester Rearrangement. J Am Chem Soc 2021; 143:7320-7325. [PMID: 33955753 DOI: 10.1021/jacs.1c03915] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Chiral morpholinone is an important building block in organic synthesis and a pharmacophore in medicinal chemistry. However, catalytic enantioselective methods for the construction of this N,O-heterocycle remain scarce. We report herein a chiral phosphoric acid-catalyzed enantioselective synthesis of C3-substituted morpholinones from aryl/alkylglyoxals and 2-(arylamino)ethan-1-ols. The reaction proceeds through a domino [4 + 2] heteroannulation followed by a 1,2-aryl/alkyl shift of the resulting cyclic α-iminium hemiacetals. It represents formally an unprecedented asymmetric aza-benzilic ester rearrangement reaction. A concise synthesis of L-742,694, a neurokinin-1 receptor antagonist, featuring this reaction is documented.
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Affiliation(s)
- Yu-Ping He
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Hua Wu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland.,School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
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13
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Delayre B, Wang Q, Zhu J. Natural Product Synthesis Enabled by Domino Processes Incorporating a 1,2-Rearrangement Step. ACS CENTRAL SCIENCE 2021; 7:559-569. [PMID: 34056086 PMCID: PMC8155462 DOI: 10.1021/acscentsci.1c00075] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Indexed: 05/07/2023]
Abstract
The art of natural product total synthesis is closely associated with two major determinants: the development/application of novel chemical reactions and the innovation in strategic use of classic organic reactions. While purposely seeking/applying a new synthetic methodology allowing nonconventional bond disconnections could shorten the synthetic route, the development of domino processes composed of a series of well-established reactions could also lead to a concise, practical, and aesthetically appealing synthesis. As an important class of textbook reactions, the 1,2-anionotropic rearrangements discovered at the dawn of modern organic chemistry have important bearings not only on chemical synthesis but also on the conceptual breakthroughs in the field. In its basic form, the 1,2-shift affords nothing but a constitutional isomer of the starting material and is therefore not a complexity-generating transformation. However, such a simple 1,2-shift could in fact change the molecular topology if the precursor is cleverly designed. More dramatically, it can metamorphosize the structure of the substrate when it is combined with other transformations in a domino sequence. In this Outlook, we highlight recent examples of natural product synthesis featuring a key domino process incorporating a 1,2-anionotropic rearrangement. Specifically, domino reactions integrating Wagner-Meerwein, pinacol, α-ketol, α-aminoketone, α-iminol, or benzilic acid rearrangements will be discussed.
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14
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Cho SM, Lee SY, Ryu DH. Enantioselective Acyloin Rearrangement of Acyclic Aldehydes Catalyzed by Chiral Oxazaborolidinium Ion. Org Lett 2021; 23:1516-1520. [PMID: 33555190 DOI: 10.1021/acs.orglett.1c00314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A catalytic enantioselective acyloin rearrangement of acyclic aldehydes to synthesize highly optically active acyloin derivatives is described. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction provided chiral α-hydroxy aryl ketones in high yield (up to 95%) and enantioselectivity (up to 98% ee). In addition, the enantioselective acyloin rearrangement of α,α-dialkyl-α-siloxy aldehydes produced chiral α-siloxy alkyl ketones in high yield (up to 92%) with good enantioselectivity (up to 89% ee).
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Affiliation(s)
- Soo Min Cho
- Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon 16419, Korea
| | - Si Yeon Lee
- Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon 16419, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, 300 Cheoncheon, Jangan, Suwon 16419, Korea
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15
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Cheng N, Cui SQ, Ma QQ, Wei ZL, Liao WW. α-Iminol Rearrangement Triggered by Pd-Catalyzed C-H Addition to Nitriles Sequences: Synthesis of Functionalized α-Amino Cyclopentanones. Org Lett 2021; 23:1021-1025. [PMID: 33496596 DOI: 10.1021/acs.orglett.0c04214] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A α-iminol rearrangement triggered by Pd-catalyzed C-H addition of electronic-rich heteroarenes to cyclobutanone-derived O-acyl cyanohydrins was described, which provided a practical and efficient protocol for the preparation of functionalized α-amino cyclopentanones in an atom- and step-economic fashion. In addition, further synthetic transformations of products have also been demonstrated.
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Affiliation(s)
- Na Cheng
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Shu-Qiang Cui
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Qian-Qian Ma
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Zhong-Lin Wei
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
| | - Wei-Wei Liao
- Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P.R. China
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16
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Long X, Wu H, Ding Y, Qu C, Deng J. Biosynthetically Inspired Divergent Syntheses of Merocytochalasans. Chem 2021. [DOI: 10.1016/j.chempr.2020.11.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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17
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18
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Zhou Z, Xu Y, Zhu B, Li P, Hu G, Yang F, Xu S, Zhang X. One-pot synthesis of 3-hydroxy-2-oxindoles via acyloin rearrangements of 2-hydroxy-indolin-3-ones generated in situ from 2-alkynyl arylazides. NEW J CHEM 2020. [DOI: 10.1039/d0nj04588h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A novel one-pot method to prepare 3-hydroxy-2-oxindoles via acyloin rearrangements of 2-hydroxy-indolin-3-ones generated in situ from 2-alkynyl arylazides has been described.
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Affiliation(s)
- Zhiqiang Zhou
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Yao Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Boyu Zhu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Ping Li
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Guiwen Hu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Fan Yang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Shijie Xu
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xiaoxiang Zhang
- Co-Innovation Center for Efficient Processing and Utilization of Forest Products
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| |
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