101
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Dai XJ, Engl OD, León T, Buchwald SL. Catalytic Asymmetric Synthesis of α-Arylpyrrolidines and Benzo-fused Nitrogen Heterocycles. Angew Chem Int Ed Engl 2019; 58:3407-3411. [PMID: 30659729 PMCID: PMC6553474 DOI: 10.1002/anie.201814331] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Indexed: 11/11/2022]
Abstract
Herein, we report a practical two-step synthetic route to α-arylpyrrolidines through Suzuki-Miyaura cross-coupling and enantioselective copper-catalyzed intramolecular hydroamination reactions. The excellent stereoselectivity and broad scope for the transformation of substrates with pharmaceutically relevant heteroarenes render this method a practical and versatile approach for pyrrolidine synthesis. Additionally, this intramolecular hydroamination strategy facilitates the asymmetric synthesis of tetrahydroisoquinolines and medium-ring dibenzo-fused nitrogen heterocycles.
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Affiliation(s)
- Xi-Jie Dai
- Department of Chemistry, Room 18–490 Massachusetts Institute
ofTechnology, Cambridge, MA 02139 (USA)
| | - Oliver D. Engl
- Department of Chemistry, Room 18–490 Massachusetts Institute
ofTechnology, Cambridge, MA 02139 (USA)
| | - Thierry León
- Department of Chemistry, Room 18–490 Massachusetts Institute
ofTechnology, Cambridge, MA 02139 (USA)
| | - Stephen L. Buchwald
- Department of Chemistry, Room 18–490 Massachusetts Institute
ofTechnology, Cambridge, MA 02139 (USA)
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102
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Luo G, Xiang M, Krische MJ. Successive Nucleophilic and Electrophilic Allylation for the Catalytic Enantioselective Synthesis of 2,4-Disubstituted Pyrrolidines. Org Lett 2019; 21:2493-2497. [PMID: 30816719 DOI: 10.1021/acs.orglett.9b00508] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Successive nucleophilic and electrophilic allylation mediated by the bis-Boc-carbonate derived from 2-methylene-1,3-propane diol enables formation of enantiomerically enriched 2,4-disubstituted pyrrolidines. An initial enantioselective iridium-catalyzed transfer hydrogenative carbonyl C-allylation is followed by Tsuji-Trost N-allylation using 2-nitrobenzenesulfonamide. Subsequent Mitsunobu cyclization provides the N-protected 2,4-disubstituted pyrrolidines.
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Affiliation(s)
- Guoshun Luo
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Ming Xiang
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Michael J Krische
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
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103
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Catalytic Asymmetric Synthesis of α-Arylpyrrolidines and Benzo-fused Nitrogen Heterocycles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814331] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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104
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Sun AW, Hess SN, Stoltz BM. Enantioselective synthesis of gem-disubstituted N-Boc diazaheterocycles via decarboxylative asymmetric allylic alkylation. Chem Sci 2019; 10:788-792. [PMID: 30774872 PMCID: PMC6345351 DOI: 10.1039/c8sc03967d] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 10/29/2018] [Indexed: 11/28/2022] Open
Abstract
An enantioselective synthesis of diverse N4-Boc-protected α,α-disubstituted piperazin-2-ones using the palladium-catalyzed decarboxylative allylic alkylation reaction has been achieved. Using a chiral Pd-catalyst derived from an electron deficient PHOX ligand, chiral piperazinones are synthesized in high yields and enantioselectivity. The chiral piperazinone products can be deprotected and reduced to valuable gem-disubstituted piperazines. This reaction is further extended to enable the enantioselective synthesis of α,α-disubstituted tetrahydropyrimidin-2-ones, which are hydrolyzed into corresponding chiral β2,2-amino acids.
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Affiliation(s)
- Alexander W Sun
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Stephan N Hess
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
| | - Brian M Stoltz
- Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , California 91125 , USA .
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105
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Al Otaibi A, Deane FM, Russell CC, Hizartzidis L, McCluskey SN, Sakoff JA, McCluskey A. A methanol and protic ionic liquid Ugi multicomponent reaction path to cytotoxic α-phenylacetamido amides. RSC Adv 2019; 9:7652-7663. [PMID: 35521167 PMCID: PMC9061180 DOI: 10.1039/c9ra00118b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 02/04/2019] [Indexed: 12/03/2022] Open
Abstract
The Ugi four component reaction of an aldehyde, amine, isocyanide and an ethanoic acid was effected smoothly in protic ionic liquids ethylammonium nitrate (EAN) and propylammonium nitrate (PAN) to afford analogues of α-phenylacetamido amides in good to excellent isolated yields. The corresponding reactions in [BMIM][PF6] and the protic ionic liquid ethanolammonium nitrate (ETAN) failed. Microwave irradiation in EAN facilitated rapid access to three focused libraries, based on the parent isocyanide: cyclohexyl isocyanide, benzyl isocyanide and ethyl isocyanoacetate. Analysis of the structure activity relationship data suggested the presence of a bulky moiety originating from the isocyanide (cyclohexyl and benzyl) enhanced cytotoxicity. Removal of the acetylenic H-atom from the ethanoic acid moiety was detrimental to cytotoxicity. The most active analogues produced, N-(2-cyclohexylamino)-1-(4-methoxyphenyl)-2-oxoethyl-N-(3,5-dimethoxyphenyl)propiolamide, returned average GI50 values of ≤1 μM across the cancer cell lines evaluated. Combined, these data suggest that analogues of this nature are interesting potential anti-cancer development leads. The Ugi reaction (aldehyde, amine, isocyanide and an ethanoic acid) in the protic ionic liquids ethylammonium nitrate (EAN) and propylammonium nitrate (PAN) gave excellent yields of α-phenylacetamido amides.![]()
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Affiliation(s)
- Ahmed Al Otaibi
- Chemistry, School of Environmental & Life Sciences
- The University of Newcastle
- Australia
| | - Fiona M. Deane
- Chemistry, School of Environmental & Life Sciences
- The University of Newcastle
- Australia
| | - Cecilia C. Russell
- Chemistry, School of Environmental & Life Sciences
- The University of Newcastle
- Australia
| | - Lacey Hizartzidis
- Chemistry, School of Environmental & Life Sciences
- The University of Newcastle
- Australia
| | - Siobhann N. McCluskey
- Chemistry, School of Environmental & Life Sciences
- The University of Newcastle
- Australia
| | | | - Adam McCluskey
- Chemistry, School of Environmental & Life Sciences
- The University of Newcastle
- Australia
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106
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Yang P, Zhang C, Gao WC, Ma Y, Wang X, Zhang L, Yue J, Tang B. Nickel-catalyzed borrowing hydrogen annulations: access to diversified N-heterocycles. Chem Commun (Camb) 2019; 55:7844-7847. [DOI: 10.1039/c9cc03975a] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient nickel-catalyzed synthesis of diversified N-heterocycles via atom-economic borrowing hydrogen annulations of easily available alcohols and amines.
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Affiliation(s)
- Peng Yang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
| | - Caili Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
| | - Wen-Chao Gao
- College of Biomedical Engineering
- Taiyuan University of Technology
- Taiyuan 030024
- P. R. China
| | - Yu Ma
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
| | - Xiuhua Wang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
| | - Li Zhang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
| | - Jieyu Yue
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
| | - Bo Tang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals
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107
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Liu S, Zhao Z, Wang Y. Construction of N-Heterocycles through Cyclization of Tertiary Amines. Chemistry 2018; 25:2423-2441. [PMID: 30357981 DOI: 10.1002/chem.201803960] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 12/27/2022]
Abstract
N-Heterocycles have been found in a large number of natural products, drug molecules, and bioactive compounds, and they thereby play a vital role in diverse research disciplines including drug discovery, organic synthesis, chemical biology, and material science. To this end, the development of new methods and strategies for the construction of N-heterocyclic frameworks is arguably one of the most dynamic and significant research areas in organic synthesis. One of these powerful approaches to the synthesis of N-heterocycles is to establish cyclization reactions based on the transformation of tertiary amines, which has emerged as an attractive research topic. In this Minireview, the significant achievements in the construction of N-heterocycles through cyclization of tertiary amines are highlighted and a comprehensive overview of the rational design, development, and application of these synthetic methods is presented.
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Affiliation(s)
- Shuya Liu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Nanlu, Jinan, 250100, Shandong, P. R. China
| | - Zhiguo Zhao
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Nanlu, Jinan, 250100, Shandong, P. R. China
| | - Yao Wang
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, 27 Shanda Nanlu, Jinan, 250100, Shandong, P. R. China
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108
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Li SS, Lv X, Ren D, Shao CL, Liu Q, Xiao J. Redox-triggered cascade dearomative cyclizations enabled by hexafluoroisopropanol. Chem Sci 2018; 9:8253-8259. [PMID: 30542574 PMCID: PMC6240893 DOI: 10.1039/c8sc03339k] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 08/31/2018] [Indexed: 12/14/2022] Open
Abstract
An unprecedented cascade dearomative cyclization through hydrogen-bonding-assisted hydride transfer is realized. The aggregate effect of HFIP enables the rapid buildup of polycyclic amines directly from phenols and o-aminobenzaldehydes via a cascade dearomatization/rearomatization/dearomatization sequence. This unique transformation addressed the drawbacks of hydride transfer-involved redox-neutral reactions.
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Affiliation(s)
- Shuai-Shuai Li
- Shandong Province Key Laboratory of Applied Mycology , College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao , 266109 , China .
| | - Xintong Lv
- Shandong Province Key Laboratory of Applied Mycology , College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao , 266109 , China .
| | - Didi Ren
- Shandong Province Key Laboratory of Applied Mycology , College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao , 266109 , China .
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs , The Ministry of Education of China , School of Medicine and Pharmacy , Ocean University of China , Qingdao 266003 , China
| | - Qing Liu
- College of Chemical and Environmental Engineering , Shandong University of Science and Technology , Qingdao 266590 , China
| | - Jian Xiao
- Shandong Province Key Laboratory of Applied Mycology , College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , Qingdao , 266109 , China .
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109
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Didier D, Baumann AN, Eisold M. Unsaturated four-membered N-heterocycles: From synthesis to applications. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.09.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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110
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Buettner CS, Willcox D, Chappell BGN, Gaunt MJ. Mechanistic investigation into the C(sp 3)-H acetoxylation of morpholinones. Chem Sci 2018; 10:83-89. [PMID: 30713620 PMCID: PMC6331033 DOI: 10.1039/c8sc03434f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 09/28/2018] [Indexed: 12/15/2022] Open
Abstract
The study of a selective palladium(ii)-catalyzed C(sp3)–H acetoxylation reaction on a class of cyclic alkyl amines is reported.
The study of a selective palladium(ii)-catalyzed C(sp3)–H acetoxylation reaction on a class of cyclic alkyl amines is reported. Computational modelling and kinetic studies were used to provide support for a mechanism involving selective C–O bond formation from a γ-aminoalkyl-Pd(iv) intermediate. The C–O bond forming step was computed to occur by a dissociative ionization mechanism followed by an SN2 process involving external acetate attack at the C–Pd(iv) bond. This pathway was computed to be of lowest energy with no competing C–N products observed. Additionally, with a few modifications to reaction conditions, preliminary studies showed that this process could be rendered enantioselective in the presence of a non-racemic BINOL-phosphoric acid.
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Affiliation(s)
- Cornelia S Buettner
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , UK .
| | - Darren Willcox
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , UK .
| | - Ben G N Chappell
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , UK .
| | - Matthew J Gaunt
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , UK .
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111
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Yang GP, He X, Yu B, Hu CW. Cu1.5
PMo12
O40
-catalyzed condensation cyclization for the synthesis of substituted pyrazoles. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4532] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Guo-Ping Yang
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic, School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
- China Academy of Engineering Physics; P. R. China
| | - Xing He
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic, School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
| | - Bing Yu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 Henan Province P. R. China
| | - Chang-Wen Hu
- Key Laboratory of Cluster Science of Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic, School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 P. R. China
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112
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Wu J, Kong Y, Liu L, Chang W, Li J. Metal-free multicomponent cascade reactions of homopropargylic amines and acyl chlorides as well as potassium thiocyanate and diiodine: an access to thiazine imides. Org Biomol Chem 2018; 16:5955-5959. [PMID: 30087977 DOI: 10.1039/c8ob01557k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A novel metal-free multicomponent cascade reaction was developed for the construction of thiazine imides. This four-component cascade reaction had advantages of mild reaction conditions, wide substrate scope and good atom economy. Four new bonds were formed in one pot via a 6-exo-dig iodothiolation cyclization of homopropargylic amines. The corresponding E-configurational thiazine imide products possess an exocyclic vinyliodide functional group.
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Affiliation(s)
- Jing Wu
- The State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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113
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Group 4 Complexes Bearing Pyrrolide Ligand for Intramolecular Alkene Hydroamination and Activation of C≡N Bond. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800109] [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]
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114
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Wen K, Wu Z, Chen B, Chen J, Zhang W. Pd(ii)-Catalyzed aerobic 1,2-difunctionalization of conjugated dienes: efficient synthesis of morpholines and 2-morpholones. Org Biomol Chem 2018; 16:5618-5625. [PMID: 30027979 DOI: 10.1039/c8ob01291a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel and efficient methodology concerning the Pd(ii)-catalyzed intermolecular difunctionalization of conjugated dienes is reported to synthesize a series of functionalized morpholines and 2-morpholones. Widely distributed and easily obtained β-amino alcohols and α-amino acids, as starting nitrogen and oxygen sources, are successfully applied in the difunctionalization of conjugated dienes respectively. The majority of the desired products were obtained in moderate to excellent yields. Oxygen was successfully employed as a terminal oxidant. Further transformation of the generated products allowed for the expansion of structural diversity.
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Affiliation(s)
- Ke Wen
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P.R. China.
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115
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Kumar Y, Jaiswal Y, Kumar A. Visible-Light-Mediated Remote γ-C(sp3)–H Functionalization of Alkylimidates: Synthesis of 4-Iodo-3,4-dihydropyrrole Derivatives. Org Lett 2018; 20:4964-4969. [DOI: 10.1021/acs.orglett.8b02022] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yogesh Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801106, Bihar, India
| | - Yogesh Jaiswal
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801106, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801106, Bihar, India
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116
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Powell WC, Walczak MA. Asymmetric Synthesis of Chiral 1,2-Amino Alcohols and Morpholin-2-ones from Arylglyoxals. J Org Chem 2018; 83:10487-10500. [PMID: 30039699 DOI: 10.1021/acs.joc.8b01516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Chiral 1,2-amino alcohols are privileged scaffolds with important applications as drug candidates and chiral ligands. Although various methods for the preparation of this structural motif have been reported, these methods are limited because of the use of precious metals and ligands. Here, we report a practical and high yielding synthesis of chiral 1,2-amino alcohols using arylglyoxals and pseudoephedrine auxiliary. This reaction is catalyzed by a Brønsted acid and provides morpholinone products in high yields and selectivities. The morpholine ring was converted into 1,2-amino alcohols in a two-step protocol.
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Affiliation(s)
- Wyatt C Powell
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry , University of Colorado , Boulder , Colorado 80309 , United States
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117
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Härling SM, Fener BE, Krieck S, Görls H, Westerhausen M. Potassium Dimesitylphosphinite Catalyzed Intermolecular Hydrophosphorylation of Alkynes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00368] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Stephan M. Härling
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Benjamin E. Fener
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Sven Krieck
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstraße 8, D-07743 Jena, Germany
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118
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Abstract
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox-neutral annulations with 2-(2-oxoethyl)malonates in the presence of catalytic amounts of benzoic acid. These reactions install a fully saturated five-membered ring and provide access to structures closely related to the natural products crispine A and harmicine.
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Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Hemant S. Chandak
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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119
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A simple approach for the synthesis of azocine alkaloids: The total synthesis of megallanesine. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.05.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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120
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Santiago JV, Burtoloso ACB. Rapid Synthesis of Bicyclic N-Heterocyclic Cores from N-Terminal α,β-Unsaturated Diazoketones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800239] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- João Victor Santiago
- Instituto de Química de São Carlos; Universidade de São Paulo; CEP 13560- 970 São Carlos, SP Brazil
| | - Antonio C. B. Burtoloso
- Instituto de Química de São Carlos; Universidade de São Paulo; CEP 13560- 970 São Carlos, SP Brazil
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121
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Cabrera PJ, Lee M, Sanford MS. Second-Generation Palladium Catalyst System for Transannular C-H Functionalization of Azabicycloalkanes. J Am Chem Soc 2018; 140:5599-5606. [PMID: 29652497 PMCID: PMC5956530 DOI: 10.1021/jacs.8b02142] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This article describes the development of a second-generation catalyst system for the transannular C-H functionalization of alicyclic amines. Pyridine- and quinoline-carboxylate ligands are shown to be highly effective for increasing the reaction rate, yield, and scope of Pd-catalyzed transannular C-H arylation reactions of azabicyclo[3.1.0]hexane, azabicyclo[3.1.1]heptane, azabicyclo[3.2.1]octane, and piperidine derivatives. Mechanistic studies reveal that the pyridine/quinoline-carboxylates play a role in impeding both reversible and irreversible catalyst decomposition pathways. These ligands enable the first reported examples of the transannular C-H arylation of the ubiquitous tropane, 7-azanorbornane, and homotropane cores. Finally, the pyridine/quinoline-carboxylates are shown to promote both transannular C-H arylation and transannular C-H dehydrogenation on a homotropane substrate.
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122
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Qu B, Mangunuru HPR, Tcyrulnikov S, Rivalti D, Zatolochnaya OV, Kurouski D, Radomkit S, Biswas S, Karyakarte S, Fandrick KR, Sieber JD, Rodriguez S, Desrosiers JN, Haddad N, McKellop K, Pennino S, Lee H, Yee NK, Song JJ, Kozlowski MC, Senanayake CH. Enantioselective Synthesis of α-(Hetero)aryl Piperidines through Asymmetric Hydrogenation of Pyridinium Salts and Its Mechanistic Insights. Org Lett 2018; 20:1333-1337. [PMID: 29461064 PMCID: PMC5835364 DOI: 10.1021/acs.orglett.8b00067] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Enantioselective synthesis of α-aryl and α-heteroaryl piperidines is reported. The key step is an iridium-catalyzed asymmetric hydrogenation of substituted N-benzylpyridinium salts. High levels of enantioselectivity up to 99.3:0.7 er were obtained for a range of α-heteroaryl piperidines. DFT calculations support an outersphere dissociative mechanism for the pyridinium reduction. Notably, initial protonation of the final enamine intermediate determines the stereochemical outcome of the transformation rather than hydride reduction of the resultant iminium intermediate.
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Affiliation(s)
- Bo Qu
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Hari P. R. Mangunuru
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Sergei Tcyrulnikov
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Daniel Rivalti
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Olga V. Zatolochnaya
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Dmitry Kurouski
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Suttipol Radomkit
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Soumik Biswas
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Shuklendu Karyakarte
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Keith R. Fandrick
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Joshua D. Sieber
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Sonia Rodriguez
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Jean-Nicolas Desrosiers
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Nizar Haddad
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Keith McKellop
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Scott Pennino
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Heewon Lee
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Nathan K. Yee
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Jinhua J. Song
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
| | - Marisa C. Kozlowski
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Chris H. Senanayake
- Chemical Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Ridgebury Road, Ridgefield, CT 06877, USA
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123
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Expedient syntheses of N-heterocycles via intermolecular amphoteric diamination of allenes. Nat Commun 2018; 9:721. [PMID: 29459667 PMCID: PMC5818626 DOI: 10.1038/s41467-018-03085-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 01/17/2018] [Indexed: 11/24/2022] Open
Abstract
Saturated 1,4-diazo heterocycles including piperazines, 1,4-diazepanes, and 1,4-diazocanes, are highly important for therapeutic development, but their syntheses are often tedious. We describe here an amphoteric diamination strategy to unite readily available 1,2-, 1,3- or 1,4-diamine derivatives with electron-deficient allenes via a formal [n + 2] (n = 4, 5, 6) cyclization mode to produce the corresponding 1,4-diazo heterocycles in just one step. This strategy features mild reaction conditions, high functional group tolerance, and scalability (gram scale). The reagents used are cheap and readily available and no transition metal catalysts are needed. More sophisticated products containing trifluoromethyl group or bicyclic ring systems can be accessed via a one-pot procedure as well. Our mechanistic studies support that formation of mono-iodinated or chlorinated diamine intermediates is important for the desired transformation and the commonly proposed chloride-iodide exchange process and a radical N−C bond formation is unlikely when the combination of NCS/KI is used. Saturated N-heterocycle rings are common structural motifs of many FDA-approved drugs. Here, the authors show that a metal-free amphoteric diamination of allenes produces valuable six-, seven- and eight-membered N-heterocycles with high diversity and tolerance of functional groups on the ring.
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124
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Chen X, Zhao H, Chen C, Jiang H, Zhang M. Iridium-Catalyzed Dehydrogenative α-Functionalization of (Hetero)aryl-Fused Cyclic Secondary Amines with Indoles. Org Lett 2018; 20:1171-1174. [DOI: 10.1021/acs.orglett.8b00096] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiuwen Chen
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - He Zhao
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Chunlian Chen
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
| | - Min Zhang
- Key Lab of Functional Molecular
Engineering of Guangdong Province, School of Chemistry and Chemical
Engineering, South China University of Technology, Guangzhou 510641, China
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125
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Yan LJ, Wang JL, Xu D, Burgess KS, Zhu AF, Rao YY, Chen XB, Wang YC. Chemically Sustainable and Green One-Pot Multicomponent Synthesis of Highly Functionalized Polycyclic N
-Fused-Pyrrolidine Heterocycles. ChemistrySelect 2018. [DOI: 10.1002/slct.201702188] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Li-Jun Yan
- School of Vocational and Technical Education; Yunnan Normal University; Kunming 650092, PR China
| | - Jun-Liang Wang
- School of Chemical Science and Technology; Yunnan University, Kunming; 650091, PR China
| | - Dan Xu
- School of Vocational and Technical Education; Yunnan Normal University; Kunming 650092, PR China
| | - Kevin S. Burgess
- Department of Biology; College of Letters & Sciences; Columbus State University; University System of Georgia, Columbus, GA; USA
| | - Ai-Fei Zhu
- School of Vocational and Technical Education; Yunnan Normal University; Kunming 650092, PR China
| | - Yan-Ying Rao
- School of Vocational and Technical Education; Yunnan Normal University; Kunming 650092, PR China
| | - Xue-Bing Chen
- Key Laboratory of Natural Pharmaceutical and Chemical Biology of Yunnan Province; School of Science; Honghe University, Mengzi, Yunnan; 661199, PR China
| | - Yong-Chao Wang
- School of Vocational and Technical Education; Yunnan Normal University; Kunming 650092, PR China
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126
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Weng WZ, Xie J, Zhang B. Mild and efficient synthesis of indoles and isoquinolonesviaa nickel-catalyzed Larock-type heteroannulation reaction. Org Biomol Chem 2018; 16:3983-3988. [PMID: 29761816 DOI: 10.1039/c8ob00795k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A simple and mild approach for the preparation of substituted indoles and isoquinolonesviaa nickel-catalyzed Larock-type heteroannulation reaction is reported.
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Affiliation(s)
- Wei-Zhi Weng
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Jian Xie
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Bo Zhang
- State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
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127
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Matsui K, Maegawa Y, Waki M, Inagaki S, Yamamoto Y. Transfer hydrogenation of nitrogen heterocycles using a recyclable rhodium catalyst immobilized on bipyridine-periodic mesoporous organosilica. Catal Sci Technol 2018. [DOI: 10.1039/c7cy02167d] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transfer hydrogenation of unsaturated nitrogen heterocycles using a rhodium catalyst immobilized on bipyridine-periodic mesoporous organosilica (BPy-PMO) is described.
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Affiliation(s)
- Kazuma Matsui
- Department of Basic Medicinal Sciences
- Graduate School of Pharmaceutical Sciences
- Nagoya University
- Chikusa
- Japan
| | | | - Minoru Waki
- Toyota Central R&D Laboratories, Inc
- Nagakute
- Japan
| | | | - Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences
- Graduate School of Pharmaceutical Sciences
- Nagoya University
- Chikusa
- Japan
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128
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Yang GP, Shang SX, Yu B, Hu CW. Ce(iii)-Containing tungstotellurate(vi) with a sandwich structure: an efficient Lewis acid–base catalyst for the condensation cyclization of 1,3-diketones with hydrazines/hydrazides or diamines. Inorg Chem Front 2018. [DOI: 10.1039/c8qi00678d] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A new Ce3+ modified Dawson-like polyoxometalate cluster was synthesized, which showed good Lewis acid and Lewis base activities in the condensation reaction.
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Affiliation(s)
- Guo-Ping Yang
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
| | - Shu-Xia Shang
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
| | - Bing Yu
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Chang-Wen Hu
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- P. R. China
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129
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Zhu CZ, Feng JJ, Zhang J. Divergent synthesis of functionalized pyrrolidines and γ-amino ketones via rhodium-catalyzed switchable reactions of vinyl aziridines and silyl enol ethers. Chem Commun (Camb) 2018; 54:2401-2404. [DOI: 10.1039/c8cc00279g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Rhodium-catalyzed enantiospecific intermolecular [3+2] cycloadditions and ring-opening reactions of vinylaziridines with silyl enol ethers have been developed to synthesize functionalized pyrrolidines and γ-amino ketones, respectively.
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Affiliation(s)
- Chao-Ze Zhu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Jian-Jun Feng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200062
- China
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130
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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.
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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
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131
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Zhu Z, Lv X, Anesini JE, Seidel D. Synthesis of Polycyclic Imidazolidinones via Amine Redox-Annulation. Org Lett 2017; 19:6424-6427. [PMID: 29144764 PMCID: PMC5715285 DOI: 10.1021/acs.orglett.7b03309] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Indexed: 11/30/2022]
Abstract
α-Ketoamides undergo redox-annulations with cyclic secondary amines, such as 1,2,3,4-tetrahydroisoquinoline, pyrrolidine, piperidine, and morpholine. Catalytic amounts of benzoic acid significantly accelerate these transformations. This approach provides polycyclic imidazolidinone derivatives in typically good yields.
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Affiliation(s)
- Zhengbo Zhu
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Xin Lv
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
- Department
of Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People’s Republic
of China
| | - Jason E. Anesini
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department
of Chemistry and Chemical Biology, Rutgers,
The State University of New Jersey, Piscataway, New Jersey 08854, United States
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132
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Lin TY, Wu HH, Feng JJ, Zhang J. Divergent Access to Functionalized Pyrrolidines and Pyrrolines via Iridium-Catalyzed Domino-Ring-Opening Cyclization of Vinyl Aziridines with β-Ketocarbonyls. Org Lett 2017; 19:6526-6529. [PMID: 29164890 DOI: 10.1021/acs.orglett.7b03232] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A useful synthesis of five-membered N-heterocycles has been developed through an iridium-catalyzed domino-ring-opening cyclization of vinylaziridines with β-ketocarbonyls. α-Substituted 1,3-dicarbonyls reacted with vinylaziridines to give 2-methylenepyrrolidines bearing two adjacent sp3-carbon centers with moderate to excellent diastereoselectivity, while the reaction of α-unsubstituted 1,3-dicarbonyls afforded 2-pyrrolines in good yield.
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Affiliation(s)
- Tao-Yan Lin
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Hai-Hong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Jian-Jun Feng
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , 3663 North Zhongshan Road, Shanghai 200062, P. R. China
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133
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Greiner R, Ziegler DS, Cibu D, Jakowetz AC, Auras F, Bein T, Knochel P. Preparation of Polyfunctional Naphthyridines by Cobalt-Catalyzed Cross-Couplings of Halogenated Naphthyridines with Magnesium and Zinc Organometallics. Org Lett 2017; 19:6384-6387. [PMID: 29152984 PMCID: PMC6400433 DOI: 10.1021/acs.orglett.7b03242] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
![]()
CoCl2 (5%)
catalyzes cross-couplings of various halogenated
naphthyridines with alkyl- and arylmagnesium halides. Also, arylzinc
halides undergo smooth cross-couplings with various naphthyridines
in the presence of CoCl2·2LiCl (5%) and sodium formate
(50%), leading to polyfunctional arylated naphthyridines. Two of these
arylated naphthyridines are highly fluorescent, with quantum efficiencies
reaching 95% and long excited-state lifetimes of up to 12 ns.
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Affiliation(s)
- Robert Greiner
- Department of Chemistry, Ludwig-Maximilians-Universität , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Dorothée S Ziegler
- Department of Chemistry, Ludwig-Maximilians-Universität , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Denise Cibu
- Department of Chemistry, Ludwig-Maximilians-Universität , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Andreas C Jakowetz
- Department of Chemistry, Ludwig-Maximilians-Universität , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Florian Auras
- Cavendish Laboratory, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| | - Thomas Bein
- Department of Chemistry, Ludwig-Maximilians-Universität , Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Paul Knochel
- Department of Chemistry, Ludwig-Maximilians-Universität , Butenandtstrasse 5-13, 81377 Munich, Germany
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134
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Chen W, Ma L, Paul A, Seidel D. Direct α-C-H bond functionalization of unprotected cyclic amines. Nat Chem 2017; 10:165-169. [PMID: 29359746 DOI: 10.1038/nchem.2871] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Accepted: 09/06/2017] [Indexed: 12/13/2022]
Abstract
Cyclic amines are ubiquitous core structures of bioactive natural products and pharmaceutical drugs. Although the site-selective abstraction of C-H bonds is an attractive strategy for preparing valuable functionalized amines from their readily available parent heterocycles, this approach has largely been limited to substrates that require protection of the amine nitrogen atom. In addition, most methods rely on transition metals and are incompatible with the presence of amine N-H bonds. Here we introduce a protecting-group-free approach for the α-functionalization of cyclic secondary amines. An operationally simple one-pot procedure generates products via a process that involves intermolecular hydride transfer to generate an imine intermediate that is subsequently captured by a nucleophile, such as an alkyl or aryl lithium compound. Reactions are regioselective and stereospecific and enable the rapid preparation of bioactive amines, as exemplified by the facile synthesis of anabasine and (-)-solenopsin A.
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Affiliation(s)
- Weijie Chen
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Longle Ma
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Anirudra Paul
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Daniel Seidel
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
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135
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Khalifa A, Conway L, Geoghegan K, Evans P. Ammonium formate-based one-pot reductive Heck reactions for the construction of cyclic sulfonamides. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.10.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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136
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Luescher MU, Songsichan T, Hsieh S, Bode JW. Copper Promoted Oxidative Coupling of SnAP Hydrazines and Aldehydes to Form Chiral 1,4,5‐Oxadiazepanes and 1,2,5‐Triazepanes. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201700199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Michael U. Luescher
- Laboratory of Organic Chemistry Department of Chemistry and Applied Biosciences ETH‐Zürich 8093 Zürich Switzerland
| | - Teerawat Songsichan
- Laboratory of Organic Chemistry Department of Chemistry and Applied Biosciences ETH‐Zürich 8093 Zürich Switzerland
| | - Sheng‐Ying Hsieh
- Laboratory of Organic Chemistry Department of Chemistry and Applied Biosciences ETH‐Zürich 8093 Zürich Switzerland
| | - Jeffrey W. Bode
- Laboratory of Organic Chemistry Department of Chemistry and Applied Biosciences ETH‐Zürich 8093 Zürich Switzerland
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137
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Shi Y, Kamer PCJ, Cole-Hamilton DJ, Harvie M, Baxter EF, Lim KJC, Pogorzelec P. A new route to N-aromatic heterocycles from the hydrogenation of diesters in the presence of anilines. Chem Sci 2017; 8:6911-6917. [PMID: 29147516 PMCID: PMC5636942 DOI: 10.1039/c7sc01718a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 08/04/2017] [Indexed: 01/14/2023] Open
Abstract
The hydrogenation of dicarboxylic acids and their esters in the presence of anilines provides a new synthesis of heterocycles. [Ru(acac)3] and 1,1,1-tris(diphenylphosphinomethyl)ethane (triphos) gave good to excellent yields of the cyclic amines at 220 °C. When aqueous ammonia was used with dimethyl 1,6-hexadienoic acid, ε-caprolactam was obtained in good yield. A side reaction involving alkylation of the amine by methanol was suppressed by using diesters derived from longer chain and branched alcohols. Hydrogenation of optically pure diesters (dimethyl (R)-2-methylbutanedioate and dimethyl (S)-2-methylbutanedioate) with aniline afforded racemic 3-methyl-1-phenylpyrrolidine in 78% yield.
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Affiliation(s)
- Yiping Shi
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
| | - Paul C J Kamer
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
| | - David J Cole-Hamilton
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
| | - Michelle Harvie
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
| | - Emma F Baxter
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
| | - Kate J C Lim
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
| | - Peter Pogorzelec
- EaStCHEM , School of Chemistry , University of St. Andrews , St. Andrews , KY16 9ST , Scotland , UK .
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138
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Zheng L, Gao F, Yang C, Gao GL, Zhao Y, Gao Y, Xia W. Visible-Light-Mediated Anti-Regioselective Nitrone 1,3-Dipolar Cycloaddition Reaction and Synthesis of Bisindolylmethanes. Org Lett 2017; 19:5086-5089. [DOI: 10.1021/acs.orglett.7b02251] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Lewei Zheng
- State
Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Fei Gao
- State
Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chao Yang
- State
Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Guo-Lin Gao
- State
Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Yating Zhao
- State
Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Yuan Gao
- School
of Chemistry and Chemical Engineering, Yantai University, #30 Qingquan
Road, Laishan District, Yantai 264005, China
| | - Wujiong Xia
- State
Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
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139
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Dewyer AL, Zimmerman PM. Simulated Mechanism for Palladium-Catalyzed, Directed γ-Arylation of Piperidine. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01390] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Amanda L. Dewyer
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Paul M. Zimmerman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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140
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Griggs SD, Thompson N, Tape DT, Fabre M, Clarke PA. A Two-Step Synthesis of 2-Spiropiperidines. Chemistry 2017; 23:9262-9265. [DOI: 10.1002/chem.201702467] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Samuel D. Griggs
- Department of Chemistry; University of York, Heslington; York YO10 5DD UK
| | - Nathan Thompson
- Department of Chemistry; University of York, Heslington; York YO10 5DD UK
| | - Daniel T. Tape
- Flexible Discovery Unit; GlaxoSmithKline Medicines Research Centre; Gunnels Wood Road Stevenage SG1 2NY UK
| | - Marie Fabre
- Department of Chemistry; University of York, Heslington; York YO10 5DD UK
| | - Paul A. Clarke
- Department of Chemistry; University of York, Heslington; York YO10 5DD UK
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141
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Abstract
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox-neutral annulations with 2-alkylquinoline-3-carbaldehydes as well as the corresponding 4-alkyl isomers and pyridine analogues. These processes involve dual C-H bond functionalization. Acetic acid is used as a cosolvent and acts as the sole promoter of these transformations.
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Affiliation(s)
- Zhengbo Zhu
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department of Chemistry and
Chemical Biology, Rutgers, The State University
of New Jersey, Piscataway, New Jersey 08854, United States
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142
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Schafroth MA, Rummelt SM, Sarlah D, Carreira EM. Enantioselective Iridium-Catalyzed Allylic Cyclizations. Org Lett 2017; 19:3235-3238. [PMID: 28573860 DOI: 10.1021/acs.orglett.7b01346] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method for the enantioselective synthesis of carbo- and heterocyclic ring systems enabled through the combination of Lewis acid activation and iridium-catalyzed allylic substitution is described. The reaction proceeds with branched, allylic alcohols and carbon nucleophiles as well as heteronucleophiles to give a diverse set of ring systems in good yields and with high enantioselectivities. The utility of the method is highlighted by the asymmetric syntheses of erythrococcamides A and B.
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Affiliation(s)
| | | | - David Sarlah
- ETH Zürich , Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
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143
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Xuan J, Cheng X, Cao X. [3+3] Cycloaddition ofin SituFormed Azaoxyallyl Cations with Nitrones: Synthesis of 1,2,4-Oxadiazinan-5-one Derivatives. ChemistrySelect 2017. [DOI: 10.1002/slct.201700826] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jun Xuan
- Department of Chemistry; Anhui University, Hefei; Anhui 230601 People's Republic of China
| | - Xiao Cheng
- Department of Chemistry; Anhui University, Hefei; Anhui 230601 People's Republic of China
| | - Xia Cao
- Department of Chemistry; Anhui University, Hefei; Anhui 230601 People's Republic of China
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144
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Manna C, Pathak T. Michael Acceptor, Masked Aldehyde and Leaving Group in a Single Intermediate: Unorthodox Approach to Enantiopure Saturated Aza-Heterocycles from a Multifunctional Glyco-Substrate. ChemistrySelect 2017. [DOI: 10.1002/slct.201700332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Chinmoy Manna
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India,
- Barauni Refinery; Indian Oil Corporation Limited; Bihar 851117 India
| | - Tanmaya Pathak
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur 721302 India,
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145
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$$\hbox {FeCl}_{3}$$
FeCl
3
-catalyzed
$$[3{+}3]$$
[
3
+
3
]
annulation between 3-oxirane-indolin-2-ones and nitrones to construct spiro[1,4,2-dioxazinan]oxindoles. Mol Divers 2017; 21:761-768. [DOI: 10.1007/s11030-017-9741-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 04/10/2017] [Indexed: 01/14/2023]
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146
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Evoniuk CJ, Gomes GDP, Ly M, White FD, Alabugin IV. Coupling Radical Homoallylic Expansions with C–C Fragmentations for the Synthesis of Heteroaromatics: Quinolines from Reactions of o-Alkenylarylisonitriles with Aryl, Alkyl, and Perfluoroalkyl Radicals. J Org Chem 2017; 82:4265-4278. [DOI: 10.1021/acs.joc.7b00262] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Christopher J. Evoniuk
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Gabriel dos Passos Gomes
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Michelle Ly
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Frankie D. White
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Igor V. Alabugin
- Department of Chemistry and
Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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147
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Hsieh SY, Bode JW. Lewis Acid Induced Toggle from Ir(II) to Ir(IV) Pathways in Photocatalytic Reactions: Synthesis of Thiomorpholines and Thiazepanes from Aldehydes and SLAP Reagents. ACS CENTRAL SCIENCE 2017; 3:66-72. [PMID: 28149955 PMCID: PMC5269652 DOI: 10.1021/acscentsci.6b00334] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Indexed: 06/06/2023]
Abstract
Redox neutral photocatalytic transformations often require careful pairing of the substrates and photoredox catalysts in order to achieve a catalytic cycle. This can limit the range of viable transformations, as we recently observed in attempting to extend the scope of the photocatalytic synthesis of N-heterocycles using silicon amine protocol (SLAP) reagents to include starting materials that require higher oxidation potentials. We now report that the inclusion of Lewis acids in photocatalytic reactions of organosilanes allows access to a distinct reaction pathway featuring an Ir(III)*/Ir(IV) couple instead of the previously employed Ir(III)*/Ir(II) pathway, enabling the transformation of aromatic and aliphatic aldehydes to thiomorpholines and thiazepanes. The role of the Lewis acid in accepting an electron-either directly or via coordination to an imine-can be extended to other classes of photocatalysts and transformations, including oxidative cyclizations. The combination of light induced reactions and Lewis acids therefore promises access to new pathways and transformations that are not viable using the photocatalysts alone.
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148
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Pradhan S, Shahi CK, Bhattacharyya A, Chauhan N, Ghorai MK. Divergent and Stereospecific Routes to Five to Eight-Membered 1,3- and 1,4-Di-Aza-Heterocycles via Ring-Opening Cyclization of Activated Aziridines with Aryl Amines. ChemistrySelect 2017. [DOI: 10.1002/slct.201602062] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Sajan Pradhan
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Chandan Kumar Shahi
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Aditya Bhattacharyya
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Navya Chauhan
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Manas K. Ghorai
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
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149
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Reddy CN, Sathish M, Adhikary S, Nanubolu JB, Alarifi A, Maurya RA, Kamal A. Phenacyl azides as efficient intermediates: one-pot synthesis of pyrrolidines and imidazoles. Org Biomol Chem 2017; 15:2730-2733. [DOI: 10.1039/c7ob00299h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phenacyl azides: versatile substrates to produce various diastereoselective pyrrolidines and imidazoles in a one-pot manner through azomethine ylide formation with excellent yields.
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Affiliation(s)
- Chada Narsimha Reddy
- Department of Medicinal Chemistry and Biotechnology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Manda Sathish
- Department of Medicinal Chemistry and Biotechnology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Susanta Adhikary
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Hyderabad 500 037
- India
| | - Jagadeesh Babu Nanubolu
- Centre for X-Ray Crystallography
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
| | - Abdullah Alarifi
- Catalytic Chemistry Research Chair
- Chemistry Department
- College of Science
- King Saud University
- Riyadh 11451
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group
- Chemical Science & Technology Division
- CSIR-North East Institute of Science and Technology
- Jorhat
- India
| | - Ahmed Kamal
- Department of Medicinal Chemistry and Biotechnology
- CSIR-Indian Institute of Chemical Technology
- Hyderabad-500007
- India
- Department of Medicinal Chemistry
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150
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Thacker NC, Ji P, Lin Z, Urban A, Lin W. Phenanthroline-based metal–organic frameworks for Fe-catalyzed Csp3–H amination. Faraday Discuss 2017. [DOI: 10.1039/c7fd00030h] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here the synthesis of a robust and highly porous Fe-phenanthroline-based metal–organic framework (MOF) and its application in catalyzing challenging inter- and intramolecular C–H amination reactions. For the intermolecular amination reactions, a FeBr2-metalated MOF selectively functionalized secondary benzylic and allylic C–H bonds. The intramolecular amination reactions utilizing organic azides as the nitrene source required the reduction of the FeBr2-metalated MOF with NaBHEt3 to generate the active catalyst. For both reactions, Fe or Zr leaching was less than 0.1%, and MOFs could be recycled and reused with no loss in catalytic activity. Furthermore, MOF catalysts were significantly more active than the corresponding homogeneous analogs. This work demonstrates the great potential of MOFs in generating highly active, recyclable, and reusable earth abundant metal catalysts for challenging organic transformations.
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Affiliation(s)
| | - Pengfei Ji
- Department of Chemistry
- University of Chicago
- Chicago
- USA
| | - Zekai Lin
- Department of Chemistry
- University of Chicago
- Chicago
- USA
| | - Ania Urban
- Department of Chemistry
- University of Chicago
- Chicago
- USA
| | - Wenbin Lin
- Department of Chemistry
- University of Chicago
- Chicago
- USA
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