1
|
Zhao L, Hu P, Tian J, Zhang X, Yang C, Guo L, Xia W. Electrochemical Deconstructive and Ring-Expansion Functionalization of Unstrained Cycloalkanols. Org Lett 2024; 26:4882-4886. [PMID: 38815060 DOI: 10.1021/acs.orglett.4c01337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
An efficient and sustainable electrochemical method for the synthesis of cyclic ethers and acyclic aldehydes from alkanols has been reported. This strategy has been successfully applied to cycloalkanols bearing different ring sizes and different types of nucleophiles. In addition, mechanistic investigations show that the reactions undergo sequential processes, including anodic oxidation, β-scission, and nucleophilic addition. This method provides a new synthetic approach to constructing cyclic ethers and terminal aldehydes from cycloalkanols and nucleophiles.
Collapse
Affiliation(s)
- Lulu Zhao
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Pengwei Hu
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Jian Tian
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Xiao Zhang
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Lin Guo
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| |
Collapse
|
2
|
Bonfield H, Edge CM, Reid M, Kennedy AR, Pascoe DD, Lindsay DM, Valette D. Synthesis of 2,6- trans-Tetrahydropyrans Using a Palladium-Catalyzed Oxidative Heck Redox-Relay Strategy. Org Lett 2024; 26:2857-2861. [PMID: 38198695 PMCID: PMC11020158 DOI: 10.1021/acs.orglett.3c03866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/03/2024] [Accepted: 01/05/2024] [Indexed: 01/12/2024]
Abstract
The C-aryl-tetrahydropyran motif is prevalent in nature in a number of natural products with biological activity; however, this challenging architecture still requires novel synthetic approaches. We demonstrate the application of a stereoselective Heck redox-relay strategy for the synthesis of functionalized 2,6-trans-tetrahydropyrans in excellent selectivity in a single step from an enantiopure dihydropyranyl alcohol, proceeding through a novel exo-cyclic migration. The strategy has also been applied to the total synthesis of a trans-epimer of the natural product centrolobine in excellent yield and stereoselectivity.
Collapse
Affiliation(s)
- Holly
E. Bonfield
- Department
of Pure and Applied Chemistry, University
of Strathclyde, Glasgow G1 1XL, U.K.
- Drug
Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.
| | - Colin M. Edge
- Drug
Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.
| | - Marc Reid
- Department
of Pure and Applied Chemistry, University
of Strathclyde, Glasgow G1 1XL, U.K.
| | - Alan R. Kennedy
- Department
of Pure and Applied Chemistry, University
of Strathclyde, Glasgow G1 1XL, U.K.
| | - David D. Pascoe
- Drug
Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.
| | - David M. Lindsay
- Department
of Pure and Applied Chemistry, University
of Strathclyde, Glasgow G1 1XL, U.K.
| | - Damien Valette
- Drug
Substance Development, GSK, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K.
| |
Collapse
|
3
|
Zhang X, Wang D, Chang M, Xu X, Li W, Wang W. Pd(II)-Catalyzed tandem selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins. Chem Commun (Camb) 2024; 60:594-597. [PMID: 38099810 DOI: 10.1039/d3cc05191a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
A practical and effective palladium-catalyzed selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins was reported. The active 2-methylene-1,3-cycloalkanedione was in situ generated via Pd-catalyzed enolate oxidation processes, and it subsequently reacted with a wide variety of olefins to afford various polysubstituted dihydropyran derivatives in good to excellent yields.
Collapse
Affiliation(s)
- Xu Zhang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Di Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Mengfan Chang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Xuefeng Xu
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wenguang Li
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| | - Wanya Wang
- College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, China.
| |
Collapse
|
4
|
Ahn B, Lee R, Kim H, Lee D. Concise Stereoselective Total Synthesis of (-)-Hedycoropyran A. J Org Chem 2023. [PMID: 38014885 DOI: 10.1021/acs.joc.3c02046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
A concise and stereoselective total synthesis of (-)-hedycoropyran A was accomplished in a substrate-controlled manner from a readily available alkene. Highlights of the synthesis include a highly diastereoselective dehydrogenative cycloetherification to construct the trans-2-aryl-6-alkyl-3,6-dihydro-2H-pyran framework and late-stage substrate-controlled trans-dihydroxylation at C(3,4).
Collapse
Affiliation(s)
- Byeongyeon Ahn
- College of Pharmacy and Research Institute of Pharmaceutical Science & Technology (RIPST), 206, Ajou University, Worldcup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16499, Republic of Korea
- YS Life Science Co., Ltd., 207, Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do 18581, Republic of Korea
| | - Ryangha Lee
- College of Pharmacy and Research Institute of Pharmaceutical Science & Technology (RIPST), 206, Ajou University, Worldcup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16499, Republic of Korea
| | - Hyoungsu Kim
- College of Pharmacy and Research Institute of Pharmaceutical Science & Technology (RIPST), 206, Ajou University, Worldcup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16499, Republic of Korea
| | - Dongjoo Lee
- College of Pharmacy and Research Institute of Pharmaceutical Science & Technology (RIPST), 206, Ajou University, Worldcup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16499, Republic of Korea
| |
Collapse
|
5
|
Balakrishnan MH, Sureshbabu P, Korivi R, Mannathan S. Regioselective Synthesis of 3-Substituted Isocoumarin-1-imines via Palladium-Catalyzed Denitrogenative Transannulation of 1,2,3-Benzotriazin-4(3H)-ones and Terminal Alkynes. Chem Asian J 2023; 18:e202300726. [PMID: 37711073 DOI: 10.1002/asia.202300726] [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: 08/19/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/16/2023]
Abstract
A palladium-catalyzed denitrogenative transannulation strategy to access various 3-substituted isocoumarin-1-imine frameworks using 1,2,3-benzotriazin-4(3H)-ones and terminal alkynes is described. The reaction is highly regioselective and tolerates a wide range of functional groups. The reaction is believed to proceed via a five-membered palladacycle intermediate extruding environmentally benign molecular nitrogen as a by-product. The utility of this method was showcased through the one-pot synthesis of biologically relevant 3-substituted isocoumarin scaffolds.
Collapse
Affiliation(s)
- Madasamy Hari Balakrishnan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, India
| | - Popuri Sureshbabu
- Department of Chemistry, SRM University AP, Amaravati, Andhra Pradesh, 522502, India
| | - Ramaraju Korivi
- Department of Chemistry, SRM University AP, Amaravati, Andhra Pradesh, 522502, India
| | | |
Collapse
|
6
|
Saini D, Jangid D, Fernandes RA. Asymmetric total synthesis of diosniponols A and B. Org Biomol Chem 2023; 21:6524-6530. [PMID: 37523207 DOI: 10.1039/d3ob00863k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
A concise asymmetric total synthesis of diosniponols A and B has been achieved based on an enantioselective Jacobsen kinetic resolution of racemic epoxide and the important 2,3-dihydro-4H-pyran-4-one moiety being installed by the metal-free δ-hydroxyalkynone rearrangement catalyzed by p-TsOH. A diastereoselective catalytic hydrogenation set the required all-syn stereochemistry leading to diosniponol A, which then, under the Mitsunobu inversion conditions, provided diosniponol B. The structure and absolute stereochemistry of the natural products were further confirmed.
Collapse
Affiliation(s)
- Deepak Saini
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, Maharashtra, India.
| | - Dashrath Jangid
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, Maharashtra, India.
| | - Rodney A Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, Maharashtra, India.
| |
Collapse
|
7
|
Masiuk US, Faletrov YV, Kananovich DG, Mineyeva IV. Stereodivergent Assembly of 2,6- cis- and - trans-Tetrahydropyrans via Base-Mediated Oxa-Michael Cyclization: The Key Role of the TMEDA Additive. J Org Chem 2023; 88:355-370. [PMID: 36495268 DOI: 10.1021/acs.joc.2c02382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The stereodivergent synthesis of cis- and trans-2,6-disubstituted tetrahydropyrans (THPs) via sodium hexamethyldisilazide-promoted oxa-Michael cyclization of (E)-ζ-hydroxy α,β-unsaturated esters is presented. The cyclization affords the kinetically favored trans-THPs with high stereoselectivity (dr up to 93:7) at a low temperature (-78 °C), while the room-temperature reaction does not produce the thermodynamically preferred cis-THPs as major products and occurs with poor stereocontrol. The addition of tetramethylethylenediamine (TMEDA) significantly improves the stereochemical outcome of the room-temperature cyclization and allows attaining high cis-selectivity (dr up to 99:1). The remarkable effect of TMEDA indicates that the sodium cation plays an important role in controlling the stereoselectivity of the thermodynamically driven process, that is, complexation of the cation with the cyclization products results in diminished selectivity. DFT calculations support this conclusion, indicating a greater difference in Gibbs energies of sodium-free cis- and trans-enolates compared to the respective sodium chelate complexes. The synthetic utility of the method has been demonstrated by the formal syntheses of (+)-Neopeltolide and (-)-Diospongin B and the total synthesis of (-)-Diospongin A.
Collapse
Affiliation(s)
- Uladzimir S Masiuk
- Department of Chemistry, Belarusian State University, Leningradskaya 14, 220006 Minsk, Belarus.,School of Science, Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Yaroslav V Faletrov
- Department of Chemistry, Belarusian State University, Leningradskaya 14, 220006 Minsk, Belarus.,Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya 14, 220006 Minsk, Belarus
| | - Dzmitry G Kananovich
- School of Science, Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia
| | - Iryna V Mineyeva
- Department of Chemistry, Belarusian State University, Leningradskaya 14, 220006 Minsk, Belarus
| |
Collapse
|
8
|
Liu L. Hydride-Abstraction-Initiated Catalytic Stereoselective Intermolecular Bond-Forming Processes. Acc Chem Res 2022; 55:3537-3550. [PMID: 36384272 DOI: 10.1021/acs.accounts.2c00638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The stereoselective intermolecular bond-forming reactions through the direct manipulation of ubiquitous yet inert C(sp3)-H bonds represent an important and long-standing goal in chemistry. In particular, developing such a stereoselective bimolecular transformation involving carbocation intermediates generated via site-selective hydride abstraction or formal hydride abstraction by organic oxidants would avoid the preinstallation of directing groups and is therefore attractive. Hydride-abstraction-initiated bimolecular transformations have received considerable attention, but existing examples lack stereoselective studies. Prevalent stereoselective studies typically suffer from the narrow substrate scope of specific and highly reactive N-aryl amines and diarylmethanes together with limited synthetic utility. This Account describes our recent advances in the development and synthetic application of hydride-abstraction-initiated stereoselective intermolecular C-C and C-H bond-forming processes with significantly expanded scopes involving structurally diverse N-acyl amines and ethers together with nitriles, esters, and perfluoroalkyl moieties.We first explored hydride-abstraction-initiated stereoselective intermolecular C-C bond-forming processes. Utilizing triarylmethyl cations or oxoammonium ions as hydride abstractors, we accomplished the diastereoselective oxidative C-H functionalization of structurally diverse N-acyl amines and ethers with a range of organoboranes and C-H components, efficiently installing a series of alkyl, alkenyl, aryl, and alkynyl species into the α-position of heteroatoms with good levels of diastereocontrol. Subsequently, we developed an "acetal pool" strategy as the toolbox to regulate the stability of cationic intermediates and the compatibility of organic oxidants with a delicate asymmetric catalysis system. Utilizing this strategy, we achieved the catalytic enantioselective oxidative C-H alkenylation, arylation, alkynylation, and alkylation of diverse N-acyl heterocycles with a range of boronates and C-H components. Simultaneously, we extended this strategy to the asymmetric oxidative C-H alkylation of ethers. Notably, the method allows solvents that are used daily, such as tetrahydrofuran, tetrahydropyran, and diethyl ether, to be facilely transformed to high-value-added optically pure bioactive molecules. We further expanded the scope of this challenging area from the C(sp3)-H bond adjacent to electron-donating heteroatoms to valuable electron-withdrawing functional groups including nitriles, esters, and perfluoroalkyl moieties for the stereoselective construction of single and vicinal quaternary carbon stereocenters, respectively.We studied hydride-abstraction-initiated catalytic asymmetric intermolecular C-H bond-forming processes, known as redox deracemization. Utilizing the acetal pool strategy, we reported the first redox deracemization of cyclic benzylic ethers. Later, we disclosed an aerobic one-pot deracemization of diverse α-amino acid derivatives with excellent functional group compatibility. We further achieved the deracemization of the tertiary stereogenic center adjacent to electron-withdrawing groups including perfluoroalkyl, cyano, and ester moieties, which are otherwise difficult to construct.
Collapse
Affiliation(s)
- Lei Liu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan250100, China
| |
Collapse
|
9
|
Siddique Ahmad M, Shafiq Z, Meguellati K. Cu(I)-catalyzed cross dehydrogenative coupling (CDC) of ethers and substituted styrenes. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Bowen JI, Wang L, Crump MP, Willis CL. Synthetic and biosynthetic methods for selective cyclisations of 4,5-epoxy alcohols to tetrahydropyrans. Org Biomol Chem 2022; 20:1150-1175. [PMID: 35029626 PMCID: PMC8827043 DOI: 10.1039/d1ob01905h] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Tetrahydropyrans (THPs) are common structural motifs found in natural products and synthetic therapeutic molecules. In Nature these 6-membered oxygen heterocycles are often assembled via intramolecular reactions involving either oxy-Michael additions or ring opening of epoxy-alcohols. Indeed, the polyether natural products have been particularly widely studied due to their fascinating structures and important biological properties; these are commonly formed via endo-selective epoxide-opening cascades. In this review we outline synthetic approaches for endo-selective intramolecular epoxide ring opening (IERO) of 4,5-epoxy-alcohols and their applications in natural product synthesis. In addition, the biosynthesis of THP-containing natural products which utilise IERO reactions are reviewed. In this review, methods for the selective intramolecular epoxide ring opening (IERO) of 4,5-epoxy-alcohols are discussed as well as biosynthetic pathways to tetrahydropyran-containing natural products which utilise IERO reactions.![]()
Collapse
Affiliation(s)
- James I Bowen
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Luoyi Wang
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Matthew P Crump
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Christine L Willis
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| |
Collapse
|
11
|
Eckl R, Fischer S, Sonnleitner CM, Schmidhuber D, Rehbein J, Reiser O. Stereoselective Synthesis of Biologically Relevant Tetrahydropyridines and Dihydro-2 H-pyrans via Ring-Expansion of Monocyclopropanated Heterocycles. ACS ORGANIC & INORGANIC AU 2021; 2:169-174. [PMID: 36855453 PMCID: PMC9954292 DOI: 10.1021/acsorginorgau.1c00042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A stereoselective, scalable, and metal-free ring-expansion of monocyclopropanated pyrroles and furans has been developed, leading to value-added highly functionalized tetrahydropyridine and dihydro-2H-pyran derivatives. Featuring a cyclopropylcarbinyl cation rearrangement as the key step, the selective cleavage of the unactivated endocyclic cyclopropane C-C bond is achieved. Targeted transformations of the thus obtained six-membered heterocycles give access to versatile building blocks with relevance for drug synthesis.
Collapse
|
12
|
Influence of the Substituents on the Opening of Silylepoxy Alcohols: 5- exo-Cyclization towards Tetrahydrofurans vs. Unexpected Side Reaction Leading to Tetrahydropyrans. Molecules 2021; 26:molecules26237386. [PMID: 34885968 PMCID: PMC8658919 DOI: 10.3390/molecules26237386] [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: 11/16/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 11/21/2022] Open
Abstract
The regioselective ring opening of epoxy alcohols is an effective method for the synthesis of different types of oxacycles. The 5-exo opening being preferred vs. the 6-endo mode, according to Baldwin rules, the use of silyl-substituted oxiranes has been reported as a possible method to favor the 6-endo cyclization. However, there is a need for a detailed study on the different factors (structural factors, catalyst nature or conditions) that influence this process. In this paper, the acid-catalyzed cyclization of epoxysilyl alcohols was studied, focusing on the effect of substituents and reaction conditions on the outcome of the process. Two types of heterocycles (tetrahydrofurans or tetrahydropyrans) were selectively obtained depending on the structure of the initial epoxysilyl alcohol. Interestingly, cyclization of hindered epoxysilyl alcohols mainly proceeds through an unexpected side reaction, which implies a previous isomerization to an aldehyde. A mechanistic proposal for the formation of the different products is presented.
Collapse
|
13
|
Catalytic δ-hydroxyalkynone rearrangement in the stereoselective total synthesis of centrolobine, engelheptanoxides A and C and analogues. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
14
|
Yu H, Yu B, Zhang H, Huang H. Palladium-Catalyzed Aminomethylation and Cyclization of Enynol to O-Heterocycle Confined 1,3-Dienes. Org Lett 2021; 23:3891-3896. [PMID: 33970643 DOI: 10.1021/acs.orglett.1c01019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The rational tuning of the electrophilicity of the allylpalladium intermediates enables the regioselectively intramolecular 1,2-addition of enynol in the presence of aminal. This aminomethylation and cyclization reaction via C-N bond activation and intramolecular nucleophilic addition provides a rare example for the synthesis of O-containing heterocycle-confined 1,3-dienes, which is of synthetic potential for further derivatization. The method possesses broad substrate generality as well as functional group compatibility and efficiently affords a wide range of desired products with 5-, 6-, and 8-membered O-containing heterocycles with various functional groups.
Collapse
Affiliation(s)
- Houjian Yu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Bangkui Yu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Haocheng Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Hanmin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, P. R. China
| |
Collapse
|
15
|
Yu H, Lee R, Kim H, Lee D. Diastereoselective Construction of trans-2-Alkyl-6-aryl-3,6-dihydro-2 H-pyrans via Dehydrogenative Cycloetherification Promoted by DDQ. Org Lett 2021; 23:1135-1140. [PMID: 33492976 DOI: 10.1021/acs.orglett.1c00154] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A diastereoselective synthesis of trans-2-alkyl-6-aryl-3,6-dihydro-2H-pyrans has been described. Dehydrogenative cycloetherification of (E)-(±)-1-aryl-5-hydroxy-1-alkenes promoted by DDQ proceeded cleanly via 6-endo cyclization to afford trans-2-alkyl-6-aryl-3,6-dihydro-2H-pyrans (32 examples) in good yield (up to 89%) and with moderate to excellent diastereoselectivity (up to 99:1). The synthetic utility of the method was illustrated by the second total synthesis of (±)-(2R,6S)-3,4-dehydro-1,7-bis(4-hydroxy phenyl)-4'-de-O-methyl centrolobine and a total synthesis of (±)-centrolobine.
Collapse
Affiliation(s)
- Heesun Yu
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| | - Ryangha Lee
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| | - Hyoungsu Kim
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| | - Dongjoo Lee
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| |
Collapse
|
16
|
Huang W, Xu C, Yu J, Wang M. ZnI 2-Catalyzed Aminotrifluoromethylation Cyclization of Alkenes Using PhICF 3Cl. J Org Chem 2021; 86:1987-1999. [PMID: 33378195 DOI: 10.1021/acs.joc.0c02637] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report here an alternatively catalytic aminotrifluoromethylation of alkenes using PhICF3Cl as a bifunctional reagent along with ZnI2 as a dual catalyst. A combined catalytic strategy was established for the intramolecular aminotrifluoromethylation of 4-pentenamines. As a result, a set of 2-trifluoroethyl-pyrrolidines was obtained in a high selectivity. Mechanism studies revealed that the reaction included an iodine anion-catalyzed radical chlorotrifluoromethylation of alkenes and a sequential Lewis acid-promoted aminocyclization of the resulting chlorotrifluoromethylated intermediates.
Collapse
Affiliation(s)
- Wanqiao Huang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Cong Xu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Jianxin Yu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Mang Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, China
| |
Collapse
|
17
|
Satteyyanaidu V, Chandrashekhar R, Reddy BVS, Lalli C. Modulating Prins Cyclization
versus
Tandem Prins Processes for the Synthesis of Hexahydro‐1
H
‐pyrano[3,4‐
c
]chromenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Vallabhareddy Satteyyanaidu
- Fluoro & Agrochemicals CSIR-Indian Institute of Chemical Technology Hyderabad 500 007
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110025 India
| | - Rapelli Chandrashekhar
- Fluoro & Agrochemicals CSIR-Indian Institute of Chemical Technology Hyderabad 500 007
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110025 India
| | - B. V. Subba Reddy
- Fluoro & Agrochemicals CSIR-Indian Institute of Chemical Technology Hyderabad 500 007
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110025 India
| | - Claudia Lalli
- CNRS ISCR – UMR 6226 Univ Rennes 35000 Rennes France
| |
Collapse
|
18
|
Fernandes RA, Saini D. Asymmetric Synthesis of Catechol Pyran Isolated from
Plectranthus sylvestris
by δ‐Hydroxyalkynone Rearrangement. ChemistrySelect 2020. [DOI: 10.1002/slct.202003986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400076, Maharashtra India
| | - Deepak Saini
- Department of Chemistry Indian Institute of Technology Bombay Powai, Mumbai 400076, Maharashtra India
| |
Collapse
|
19
|
Srilatha M, Satteyyanaidu V, Reddy CK, Basireddy VSR. A Unified Total Synthesis of Isocyclocapitelline and Cyclocapitelline. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20967871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A facile and concise synthesis of β-carboline alkaloids, such as (–)-isocyclocapitelline and (+)-cyclocapitelline, has been achieved from commercially available geraniol through a unified strategy. The key steps involved in this synthesis are Sharpless epoxidation, intramolecular ring opening of epoxide, Pictet-Spengler reaction, and dehydrogenative aromatization using 10% palladium/carbon in xylene under neutral conditions.
Collapse
Affiliation(s)
- Marepally Srilatha
- Fluoro-Agrochemicals, CSIR-Indian Insititute of Chemical Technology, Hyderabad, India
- School of Chemistry, Osmania University, Hyderabad, India
| | | | | | | |
Collapse
|
20
|
Lenhof J, Hutter M, Huch V, Jauch J. Towards the Total Synthesis of Jerangolids – Synthesis of an Advanced Intermediate for the Pharmacophore Substructure. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Julian Lenhof
- Organic Chemistry II Saarland University P.O. Box 111550 66041 Saarbrücken Germany
| | - Michael Hutter
- Center for Bioinformatics Saarland University P.O. Box 111550 66041 Saarbrücken Germany
| | - Volker Huch
- General and Inorganic Chemistry Saarland University P.O. Box 111550 66041 Saarbrücken Germany
| | - Johann Jauch
- Organic Chemistry II Saarland University P.O. Box 111550 66041 Saarbrücken Germany
| |
Collapse
|
21
|
Wübbolt S, Cheong CB, Frost JR, Christensen KE, Donohoe TJ. A Vinyl Cyclopropane Ring Expansion and Iridium-Catalyzed Hydrogen Borrowing Cascade. Angew Chem Int Ed Engl 2020; 59:11339-11344. [PMID: 32314851 PMCID: PMC7463175 DOI: 10.1002/anie.202003614] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/31/2020] [Indexed: 12/18/2022]
Abstract
A vinyl cyclopropane rearrangement embedded in an iridium-catalyzed hydrogen borrowing reaction enabled the formation of substituted stereo-defined cyclopentanes from Ph* methyl ketone and cyclopropyl alcohols. Mechanistic studies provide evidence for the ring-expansion reaction being the result of a cascade based on oxidation of the cyclopropyl alcohols, followed by aldol condensation with the pentamethyl phenyl-substituted ketone to form an enone containing the vinyl cyclopropane. Subsequent single electron transfer (SET) to this system initiates a rearrangement, and the catalytic cycle is completed by reduction of the new enone. This process allows for the efficient formation of diversely substituted cyclopentanes as well as the construction of complex bicyclic carbon skeletons containing up to four contiguous stereocentres, all with high diastereoselectivity.
Collapse
Affiliation(s)
- Simon Wübbolt
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
| | | | - James R. Frost
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
| | | | | |
Collapse
|
22
|
Cyclization of 1-Aryl-5-Phenylpent-4-en-2-yn-1-Ones to 2,3-Dihydropyran-2-Ones in Trifluoromethanesulfonic Acid. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02756-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
23
|
Wübbolt S, Cheong CB, Frost JR, Christensen KE, Donohoe TJ. A Vinyl Cyclopropane Ring Expansion and Iridium‐Catalyzed Hydrogen Borrowing Cascade. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003614] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Simon Wübbolt
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | - Choon Boon Cheong
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | - James R. Frost
- Chemistry Research Laboratory University of Oxford Oxford OX1 3TA UK
| | | | | |
Collapse
|
24
|
Kobayashi T, Takizawa I, Kawamoto Y, Ito H. Sequential condensation-6π-electrocyclization reaction of a chiral 1,3-Diketone possessing C2 symmetry. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151897] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
25
|
Sidorenko AY, Li‐Zhulanov NS, Mäki‐Arvela P, Sandberg T, Kravtsova AV, Peixoto AF, Freire C, Volcho KP, Salakhutdinov NF, Agabekov VE, Murzin DY. Stereoselectivity Inversion by Water Addition in the −SO
3
H‐catalyzed Tandem Prins‐Ritter Reaction for Synthesis of 4‐amidotetrahydropyran Derivatives. ChemCatChem 2020. [DOI: 10.1002/cctc.202000070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alexander Yu. Sidorenko
- Åbo Akademi University Biskopsgatan 8 20500 Turku/Åbo Finland
- Institute of Chemistry of New Materials of National Academy of Sciences of Belarus Skaryna str. 36 220141 Minsk Belarus
| | - Nikolai S. Li‐Zhulanov
- Åbo Akademi University Biskopsgatan 8 20500 Turku/Åbo Finland
- Novosibirsk Institute of Organic Chemistry Lavrentjev av. 9 630090 Novosibirsk Russia
- Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | | | - Thomas Sandberg
- Åbo Akademi University Biskopsgatan 8 20500 Turku/Åbo Finland
| | - Anna V. Kravtsova
- Institute of Chemistry of New Materials of National Academy of Sciences of Belarus Skaryna str. 36 220141 Minsk Belarus
| | - Andreia F. Peixoto
- LAQV-REQUIMTE Departamento de Química e Bioquímica Faculdade de Ciências Universidade do Porto Rua do Campo Alegre s/n 4169-007 Porto Portugal
| | - Cristina Freire
- LAQV-REQUIMTE Departamento de Química e Bioquímica Faculdade de Ciências Universidade do Porto Rua do Campo Alegre s/n 4169-007 Porto Portugal
| | - Konstantin P. Volcho
- Novosibirsk Institute of Organic Chemistry Lavrentjev av. 9 630090 Novosibirsk Russia
- Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | - Nariman F. Salakhutdinov
- Novosibirsk Institute of Organic Chemistry Lavrentjev av. 9 630090 Novosibirsk Russia
- Novosibirsk State University Pirogova st. 1 630090 Novosibirsk Russia
| | - Vladimir E. Agabekov
- Institute of Chemistry of New Materials of National Academy of Sciences of Belarus Skaryna str. 36 220141 Minsk Belarus
| | | |
Collapse
|
26
|
The mechanism study on Pd(0)-catalyzed cyclization of alkynols. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2019.112665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
27
|
Chen A, Yu H, Yan J, Huang H. Lewis Acid Catalyzed Electrophilic Aminomethyloxygenative Cyclization of Alkynols with N,O-Aminals. Org Lett 2020; 22:755-759. [DOI: 10.1021/acs.orglett.9b04630] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Anrong Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, P.R. China
| | - Houjian Yu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, P.R. China
| | - Jiaqi Yan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, P.R. China
| | - Hanmin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, P.R. China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| |
Collapse
|
28
|
Trost BM, Sarkar D, Bera N. Redox Economic Synthesis of TrisubstitutedPiperidones via Ruthenium Catalyzed Atom‐Economic Couplings of N‐Protected 1,5‐Aminoalcohols and Michael Acceptors. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900881] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Barry M. Trost
- Department of ChemistryStanford University Stanford California 94305-5080 United States
| | - Debayan Sarkar
- Department of ChemistryNational Institute of Technology Rourkela- 769008 India
| | - Nabakumar Bera
- Department of ChemistryNational Institute of Technology Rourkela- 769008 India
| |
Collapse
|
29
|
Chou H, Leow D, Tan C. Recent Advances in Chiral Guanidine‐Catalyzed Enantioselective Reactions. Chem Asian J 2019; 14:3803-3822. [DOI: 10.1002/asia.201901183] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/27/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Hsiao‐Chieh Chou
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Dasheng Leow
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Choon‐Hong Tan
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| |
Collapse
|
30
|
Kramer P, Grimmer J, Bolte M, Manolikakes G. An Enamide-Based Domino Reaction for a Highly Stereoselective Synthesis of Tetrahydropyrans. Angew Chem Int Ed Engl 2019; 58:13056-13059. [PMID: 31298800 PMCID: PMC6772187 DOI: 10.1002/anie.201907565] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Indexed: 12/23/2022]
Abstract
A novel method for the highly stereoselective synthesis of tetrahydropyrans is reported. This domino reaction is based on a twofold addition of enamides to aldehydes followed by a subsequent cyclization and furnishes fully substituted tetrahydropyrans in high yields. Three new σ‐bonds and five continuous stereogenic centers are formed in this one‐pot process with a remarkable degree of diastereoselectivity. In most cases, the formation of only one out of 16 possible diastereomers is observed. Two different stereoisomers can be accessed in a controlled fashion starting either from an E‐ or a Z‐configured enamide.
Collapse
Affiliation(s)
- Philipp Kramer
- Department of Organic Chemistry, Technical University Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663, Kaiserslautern, Germany
| | - Jennifer Grimmer
- Department of Organic Chemistry, Technical University Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663, Kaiserslautern, Germany
| | - Michael Bolte
- Department of Inorganic and Analytical Chemistry, Goethe University Frankfurt am Main, Max-von-Laue-Strasse 7, 60438, Frankfurt am Main, Germany
| | - Georg Manolikakes
- Department of Organic Chemistry, Technical University Kaiserslautern, Erwin-Schrödinger-Strasse Geb. 54, 67663, Kaiserslautern, Germany
| |
Collapse
|
31
|
Qin J, Zhang Y, Liu C, Zhou J, Zhan R, Chen W, Huang H. Asymmetric Inverse-Electron-Demand Diels–Alder Reaction of β,γ-Unsaturated Amides through Dienolate Catalysis. Org Lett 2019; 21:7337-7341. [DOI: 10.1021/acs.orglett.9b02629] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jialiang Qin
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yili Zhang
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Cuiting Liu
- Central Laboratory, Southern Medical University, Guangzhou 510515, China
| | - Jun Zhou
- School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China
| | - Ruoting Zhan
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Weiwen Chen
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Huicai Huang
- Research Center of Chinese Herbal Resource Science and Engineering, Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| |
Collapse
|
32
|
Kramer P, Grimmer J, Bolte M, Manolikakes G. An Enamide‐Based Domino Reaction for a Highly Stereoselective Synthesis of Tetrahydropyrans. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907565] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Philipp Kramer
- Department of Organic Chemistry Technical University Kaiserslautern Erwin-Schrödinger-Strasse Geb. 54 67663 Kaiserslautern Germany
| | - Jennifer Grimmer
- Department of Organic Chemistry Technical University Kaiserslautern Erwin-Schrödinger-Strasse Geb. 54 67663 Kaiserslautern Germany
| | - Michael Bolte
- Department of Inorganic and Analytical Chemistry Goethe University Frankfurt am Main Max-von-Laue-Strasse 7 60438 Frankfurt am Main Germany
| | - Georg Manolikakes
- Department of Organic Chemistry Technical University Kaiserslautern Erwin-Schrödinger-Strasse Geb. 54 67663 Kaiserslautern Germany
| |
Collapse
|
33
|
Monasterolo C, Müller-Bunz H, Gilheany DG. Very short highly enantioselective Grignard synthesis of 2,2-disubstituted tetrahydrofurans and tetrahydropyrans. Chem Sci 2019; 10:6531-6538. [PMID: 31341606 PMCID: PMC6611064 DOI: 10.1039/c9sc00978g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/25/2019] [Indexed: 12/17/2022] Open
Abstract
Phenones with elongated chains are shown to be excellent substrates for ligand-promoted asymmetric Grignard synthesis of tertiary alcohols. In turn this enables the simple, short and highly enantioselective (up to 96% ee) preparation of chiral 2,2-disubstituted THFs and THPs. Thus, asymmetric addition of Grignard reagents to γ-chlorobutyrophenones and δ-chlorovalerophenones takes place in the presence of a chiral diaminocyclohexyl-derived tridentate ligand and subsequent base-promoted intramolecular cyclisation occurs with complete retention of asymmetry. As examples of the methodology, we report the shortest syntheses of gossonorol, γ-ethyl-γ-phenylbutyrolactone and δ-methyl-δ-tolylvalerolactone, the joint-shortest and flexible synthesis of boivinianin A and the shortest formal syntheses of boivinianin B and yingzhaosu C.
Collapse
Affiliation(s)
- Claudio Monasterolo
- Centre for Synthesis and Chemical Biology , School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland . ;
| | - Helge Müller-Bunz
- Centre for Synthesis and Chemical Biology , School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland . ;
| | - Declan G Gilheany
- Centre for Synthesis and Chemical Biology , School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland . ;
| |
Collapse
|
34
|
Csókás D, Ho AXY, Ramabhadran RO, Bates RW. How an early or late transition state impacts the stereoselectivity of tetrahydropyran formation by intramolecular oxa-Michael addition. Org Biomol Chem 2019; 17:6293-6304. [PMID: 31204752 DOI: 10.1039/c9ob00750d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intramolecular oxa-Michael addition giving tetrahydropyrans has been examined experimentally using both acidic and basic catalysis. With acidic catalysis, the diequatorial product is exclusively obtained in a kinetically controlled reaction in all cases. Under basic conditions at low temperature, the reaction is again under kinetic control, but formation of the axial-equatorial isomer is generally favoured with an (E)-Michael acceptor, although isomerisation to the diequatorial isomer is observed at higher temperatures. Computationally, it is found that the acid catalysed reaction has a late transition state and the kinetic favouring of the diequatorial isomer has a steric explanation. In contrast, under strongly basic conditions, an early transition state is found. Electrostatic effects are likely to be the main contributor to the stereoselectivity for the (E)-isomer and steric interactions for the (Z)-isomer.
Collapse
Affiliation(s)
- Dániel Csókás
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore.
| | | | | | | |
Collapse
|
35
|
Hashimoto Y, Ikeda T, Ida A, Morita N, Tamura O. Inverse-Electron-Demand oxa-Diels-Alder Reactions of α-Keto-β,γ-unsaturated Esters and α,β-Unsaturated Hydrazones. Org Lett 2019; 21:4245-4249. [PMID: 31140822 DOI: 10.1021/acs.orglett.9b01422] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A concise synthetic method for dihydropyrans has been developed by inverse-electron-demand oxa-Diels-Alder reaction of α-keto-β,γ-unsaturated esters with α,β-unsaturated hydrazones as electron-rich olefins. This reaction is catalyzed by Eu(hfc)3 and proceeds in an endo-selective manner. This umpolung cycloaddition affords a variety of substituted dihydropyrans stereoselectively in high yields. In addition, indirect synthesis of formyl-substituted dihydropyran was achieved by dehydrazonation of the cycloadduct. This method is expected to be useful for the synthesis of dihydropyrans and tetrahydropyrans with unusual substitution patterns.
Collapse
Affiliation(s)
| | - Takanori Ikeda
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| | - Ayako Ida
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| | - Nobuyoshi Morita
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| | - Osamu Tamura
- Showa Pharmaceutical University , Machida , Tokyo 194-8543 , Japan
| |
Collapse
|
36
|
Segovia C, Fache F, Pelotier B, Piva O. Access to Polyfluorinated Tetrahydropyranyl Amides via Prins‐Ritter Cyclization under Green Conditions. ChemistrySelect 2019. [DOI: 10.1002/slct.201900110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Claire Segovia
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS – INSA Lyon – CPE Lyon, ICBMS UMR 5246Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Equipe SURCOOF, Bât. Raulin, 43 Bd du 11 Novembre 1918 69622 Villeurbanne Cedex France
| | - Fabienne Fache
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS – INSA Lyon – CPE Lyon, ICBMS UMR 5246Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Equipe SURCOOF, Bât. Raulin, 43 Bd du 11 Novembre 1918 69622 Villeurbanne Cedex France
| | - Béatrice Pelotier
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS – INSA Lyon – CPE Lyon, ICBMS UMR 5246Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Equipe SURCOOF, Bât. Raulin, 43 Bd du 11 Novembre 1918 69622 Villeurbanne Cedex France
| | - Olivier Piva
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS – INSA Lyon – CPE Lyon, ICBMS UMR 5246Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Equipe SURCOOF, Bât. Raulin, 43 Bd du 11 Novembre 1918 69622 Villeurbanne Cedex France
| |
Collapse
|
37
|
Singh M, Yadav LDS, Singh RKP. Direct radical sulfonylation at α-C(sp3)-H of THF with sodium sulfinates in aqueous medium. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.02.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
38
|
Díez-Poza C, Val P, Pulido FJ, Barbero A. Synthesis of Polysubstituted Tetrahydropyrans by Stereoselective Hydroalkoxylation of Silyl Alkenols: En Route to Tetrahydropyranyl Marine Analogues. Mar Drugs 2018; 16:md16110421. [PMID: 30388761 PMCID: PMC6265778 DOI: 10.3390/md16110421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 10/19/2018] [Accepted: 10/25/2018] [Indexed: 11/16/2022] Open
Abstract
Tetrahydropyrans are abundantly found in marine natural products. The interesting biological properties of these compounds and their analogues make necessary the development of convenient procedures for their synthesis. In this paper, an atom economy access to tetrahydropyrans by intramolecular acid-mediated cyclization of silylated alkenols is described. p-TsOH has shown to be an efficient reagent to yield highly substituted tetrahydropyrans. Moreover, excellent diastereoselectivities are obtained both for unsubstituted and alkylsubstituted vinylsilyl alcohols. The methodology herein developed may potentially be applied to the synthesis of marine drugs derivatives.
Collapse
Affiliation(s)
- Carlos Díez-Poza
- Department of Organic Chemistry, Faculty of Science, Campus Miguel Delibes, 47011 Valladolid, Spain.
| | - Patricia Val
- Department of Organic Chemistry, Faculty of Science, Campus Miguel Delibes, 47011 Valladolid, Spain.
| | - Francisco J Pulido
- Department of Organic Chemistry, Faculty of Science, Campus Miguel Delibes, 47011 Valladolid, Spain.
| | - Asunción Barbero
- Department of Organic Chemistry, Faculty of Science, Campus Miguel Delibes, 47011 Valladolid, Spain.
| |
Collapse
|
39
|
Lee S, Bae HY, List B. Can a Ketone Be More Reactive than an Aldehyde? Catalytic Asymmetric Synthesis of Substituted Tetrahydrofurans. Angew Chem Int Ed Engl 2018; 57:12162-12166. [PMID: 30126072 DOI: 10.1002/anie.201806312] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 11/06/2022]
Abstract
O-heterocycles bearing tetrasubstituted stereogenic centers are prepared via catalytic chemo- and enantioselective nucleophilic additions to ketoaldehydes, in which the ketone reacts preferentially over the aldehyde. Five- and six-membered rings with both aromatic and aliphatic substituents, as well as an alkynyl substituent, are obtained. Moreover, 2,2,5-trisubstituted and 2,2,5,5-tetrasubstituted tetrahydrofurans are synthesized with excellent stereoselectivities. Additionally, the synthetic utility of the described method is demonstrated with a three-step synthesis of the side chain of anhydroharringtonine.
Collapse
Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| |
Collapse
|
40
|
Lee S, Bae HY, List B. Kann ein Keton reaktiver als ein Aldehyd sein? Katalytische asymmetrische Synthese von substituierten Tetrahydrofuranen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| |
Collapse
|
41
|
Álvarez-Méndez SJ, Fariña-Ramos M, Villalba ML, Perretti MD, García C, Moujir LM, Ramírez MA, Martín VS. Stereoselective Synthesis of Highly Substituted Tetrahydropyrans through an Evans Aldol-Prins Strategy. J Org Chem 2018; 83:9039-9066. [PMID: 30036470 DOI: 10.1021/acs.joc.8b01182] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A direct and general method for the synthesis of naturally occurring 2,3,4,5,6-pentasubstituted tetrahydropyrans has been developed, employing β,γ-unsaturated N-acyl oxazolidin-2-ones as key starting materials. The combination of the Evans aldol addition and the Prins cyclization allowed the diastereoselective and efficient generation of the desired oxacycles in two fashions: a one-pot Evans aldol-Prins protocol, in which five new σ bonds and five contiguous stereocenters were straightforwardly generated, and a two-step version, which additionally permitted the isolation of β,γ-unsaturated alcohol precursors bearing an N-acyl oxazolidin-2-one in the α position. From these alcohols were also obtained halogenated pentasubstituted tetrahydropyrans as well as 2,3,4,5-tetrasubstituted tetrahydrofurans, shedding light on the mechanism of the process. Computational studies were consistent with the experimental findings, and this innovative Evans aldol-Prins strategy was performed for the preparation of a battery of more than 30 densely substituted tetrahydropyrans, unprecedentedly fused to a 1,3-oxazinane-2,4-dione ring, both in a racemic fashion and in an enantiomeric fashion. These novel molecules were successfully submitted to several transformations to permit simple access to a variety of differently functionalized tetrahydropyrans. Most of these unique molecules were evaluated for their antimicrobial activity against Gram-positive and Gram-negative bacteria and the yeast Candida albicans, and some structure-activity relationships were established.
Collapse
Affiliation(s)
- Sergio J Álvarez-Méndez
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez 2 , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| | - Marta Fariña-Ramos
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez 2 , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| | - María Luisa Villalba
- Laboratorio de Investigación y Desarrollo de Bioactivos (LIDeB), Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas , Universidad Nacional de La Plata , 47 & 115, B1900AJI La Plata , Buenos Aires , Argentina
| | - Marcelle D Perretti
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez 2 , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| | - Celina García
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez 2 , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| | - Laila M Moujir
- Departamento de Bioquímica, Microbiología, Biología Celular y Genética, Facultad de Farmacia , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez s/n , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| | - Miguel A Ramírez
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez 2 , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| | - Víctor S Martín
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica , Universidad de La Laguna (ULL) , Avda. Astrofísico Francisco Sánchez 2 , 38206 San Cristóbal de La Laguna , Tenerife , Spain
| |
Collapse
|
42
|
Kadari S, Yerrabelly H, Gogula T, Erukala YG, Yerrabelly JR, Begari PK. Stereoselective Synthesis of γ-Butyrolactones Subunit of Polycavernoside A. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sudhakar Kadari
- Department of Chemistry; Osmania University; Hyderabad Telangana 500007 India
| | - Hemasri Yerrabelly
- Department of Chemistry; Osmania University; Hyderabad Telangana 500007 India
| | - Thirupathi Gogula
- Department of Chemistry; Osmania University; Hyderabad Telangana 500007 India
| | | | | | - Prem Kumar Begari
- Department of Chemistry; Osmania University; Hyderabad Telangana 500007 India
| |
Collapse
|
43
|
Fujiya A, Yamaguchi E, Tada N, Itoh A. A Radical Reaction for the Synthesis of 3-Substituted Dihydrothiopyrans under Photosensitized Conditions. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Akitoshi Fujiya
- Graduate School of Pharmaceutical Science; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Eiji Yamaguchi
- Graduate School of Pharmaceutical Science; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Norihiro Tada
- Graduate School of Pharmaceutical Science; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| | - Akichika Itoh
- Graduate School of Pharmaceutical Science; Gifu Pharmaceutical University; 1-25-4, Daigaku-nishi Gifu 501-1196 Japan
| |
Collapse
|
44
|
Li LL, Su YL, Han ZY, Gong LZ. Assembly of Tetrahydropyran Derivatives from Aldehydes, Allylboronates, and Syngas by Asymmetric Relay Catalytic Cascade Reaction. Chemistry 2018. [PMID: 29532578 DOI: 10.1002/chem.201801197] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An efficient synthesis of highly enantio-enriched tetrahydropyrans from readily available aldehydes, allylboronates, and syngas has been established by multiply relay catalysis of rhodium and chiral phosphoric acid. The cascade reaction integrates the asymmetric allylboration of aldehydes and alkene hydroformylation, providing a structurally diverse range of products with different workup procedures. The concise synthesis of key chiral building blocks to access herboxidiene and leucascandrolide A demonstrates the high synthetic utility of this method. The cascade reaction employing alkenes to replace aldehydes was also successful.
Collapse
Affiliation(s)
- Lu-Lu Li
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yong-Liang Su
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zhi-Yong Han
- Hefei National Laboratory for Physical Sciences at 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 Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China.,Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, China
| |
Collapse
|
45
|
Lee A, Betori RC, Crane EA, Scheidt KA. An Enantioselective Cross-Dehydrogenative Coupling Catalysis Approach to Substituted Tetrahydropyrans. J Am Chem Soc 2018; 140:6212-6216. [PMID: 29714480 PMCID: PMC6052785 DOI: 10.1021/jacs.8b03063] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An enantioselective cross-dehydrogenative coupling (CDC) reaction to access tetrahydropyrans has been developed. This process combines in situ Lewis acid activation of a nucleophile in concert with the oxidative formation of a transient oxocarbenium electrophile, leading to a productive and highly enantioselective CDC. These advances represent one of the first successful applications of CDC for the enantioselective couplings of unfunctionalized ethers. This system provides efficient access to valuable tetrahydropyran motifs found in many natural products and bioactive small molecules.
Collapse
Affiliation(s)
- Ansoo Lee
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Rick C. Betori
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Erika A. Crane
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| |
Collapse
|
46
|
Chithiravel R, Rajaguru K, Muthusubramanian S, Bhuvanesh N. Characterization of the major isomers of substituted tetrahydro-2 H -pyrans from 1,3,5-triarylpentane-1,5-diols by p -toluenesulfonic acid treatment. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.12.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
47
|
Vetica F, Chauhan P, Dochain S, Enders D. Asymmetric organocatalytic methods for the synthesis of tetrahydropyrans and their application in total synthesis. Chem Soc Rev 2018; 46:1661-1674. [PMID: 28262863 DOI: 10.1039/c6cs00757k] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent advancement in the area of asymmetric organocatalysis led to the development of new methodologies for the construction of valuable enantiopure molecules, including various heterocycles. As one of the latter class of compounds tetrahydropyrans (THPs) constitute a core structure of a wide array of bioactive natural products. A noticeable growth has been observed in the asymmetric synthesis of THPs using small organic molecules as catalysts. This Tutorial Review describes the organocatalytic methods available to furnish THPs as well as the application of these methodologies in the total synthesis of THP-based natural products.
Collapse
Affiliation(s)
- Fabrizio Vetica
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | - Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | - Simon Dochain
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| | - Dieter Enders
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
| |
Collapse
|
48
|
Chen YZ, Zhu J, Wu JJ, Wu L. Organobase catalyzed straightforward synthesis of phosphinyl functionalized 2H-pyran cores from allenylphosphine oxides and 1,3-diones. Org Biomol Chem 2018; 16:6675-6679. [DOI: 10.1039/c8ob01640b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A cost-effective system is revealed here to construct polyfunctionalized 2H-pyran cores containing phosphinyl groups with an organobase as a catalyst.
Collapse
Affiliation(s)
- Yao-Zhong Chen
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Jie Zhu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Jin-Jin Wu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| | - Lei Wu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
- China
| |
Collapse
|
49
|
Beng TK, Bauder M, Rodriguez MJ, Moreno A. Copper-catalyzed regioselective dehydrogenative alkoxylation of morpholinonyl alkenols: application to the synthesis of spirotricyclic dihydropyrans and of trans-fused bicyclic morpholines. NEW J CHEM 2018. [DOI: 10.1039/c8nj03890b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A base-free, regioselective, and atom-economical approach to morpholine-fused dihydropyrans, by Cu-catalyzed intramolecular dehydrogenative alkoxylation of allylic morpholinols, is described.
Collapse
Affiliation(s)
- Timothy K. Beng
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | - Megan Bauder
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| | | | - Antonio Moreno
- Department of Chemistry
- Central Washington University
- Ellensburg
- USA
| |
Collapse
|
50
|
Affiliation(s)
- Nirupam De
- Department of Chemistry, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon 24341, Republic of Korea
| | - Eun Jeong Yoo
- Department of Chemistry, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon 24341, Republic of Korea
| |
Collapse
|