1
|
Lee S, Shin JE, Yoon R, Yoo H, Kim S. Annulation of O-silyl N, O-ketene acetals with alkynes for the synthesis of dihydropyridinones and its application in concise total synthesis of phenanthroindolizidine alkaloids. Front Chem 2023; 11:1267422. [PMID: 37810583 PMCID: PMC10551152 DOI: 10.3389/fchem.2023.1267422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 08/28/2023] [Indexed: 10/10/2023] Open
Abstract
The formation of N-heterocycles with multiple substituents is important in organic synthesis. Herein, we report a novel method for the construction of functionalized dihydropyridinone rings through the annulation of an amide α-carbon with a tethered alkyne moiety. The reaction of the amide with the alkyne was achieved via O-silyl N,O-ketene acetal formation and silver-mediated addition. Furthermore, the developed method was applied for the total synthesis of phenanthroindolizidine and phenanthroquinolizidine alkaloids. By varying the coupling partners, a concise and collective total synthesis of these alkaloids was achieved.
Collapse
Affiliation(s)
- Seokwoo Lee
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
- College of Pharmacy, Chungnam National University, Daejeon, Republic of Korea
| | - Jae Eui Shin
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Ran Yoon
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Hanbin Yoo
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| |
Collapse
|
2
|
Tricyclic Fused Lactams by Mukaiyama Cyclisation of Phthalimides and Evaluation of their Biological Activity. Antibiotics (Basel) 2022; 12:antibiotics12010009. [PMID: 36671210 PMCID: PMC9854654 DOI: 10.3390/antibiotics12010009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022] Open
Abstract
We report that phthalimides may be cyclized using a Mukaiyama-type aldol coupling to give variously substituted fused lactam (1,2,3,9b-tetrahydro-5H-pyrrolo[2,1-a]isoindol-5-one) systems. This novel process shows a high level of regioselectivity for o-substituted phthalimides, dictated by steric and electronic factors, but not for m-substituted phthalimides. The initial aldol adduct is prone to elimination, giving 2,3-dihydro-5H-pyrrolo[2,1-a]isoindol-5-ones, and the initial cyclisation can be conducted in such a way that aldol cyclisation-elimination is achievable in a one-pot approach. The 2,3-dihydro-5H-pyrrolo[2,1-a]isoindol-5-ones possess cross conjugation and steric effects which significantly influence the reactivity of several functional groups, but conditions suitable for epoxidation, ester hydrolysis and amide formation, and reduction, which provide for ring manipulation, were identified. Many of the derived lactam systems, and especially the eliminated systems, show low solubility, which compromises biological activity, although in some cases, antibacterial and cytotoxic activity was found, and this new class of small molecule provides a useful skeleton for further elaboration and study.
Collapse
|
3
|
Dixon GJ, Rodriguez MR, Chong TG, Kim KY, Downey CW. Synthesis of β,β-Disubstituted Styrenes via Trimethylsilyl Trifluoromethanesulfonate-Promoted Aldehyde-Aldehyde Aldol Coupling-Elimination. J Org Chem 2022; 87:14846-14854. [PMID: 36239694 DOI: 10.1021/acs.joc.2c01458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the presence of trimethylsilyl trifluoromethanesulfonate (TMSOTf) and 2,6-lutidine, α,α-disubstituted aldehydes condense with electron-rich aromatic aldehydes to yield β,β-disubstituted styrenes. More electron-rich aromatic aldehydes react more rapidly and in higher yield. Preliminary results suggest that the reaction may proceed via the ionization and formal deformylation of an aldol intermediate.
Collapse
Affiliation(s)
- Grant J Dixon
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, Virginia USA 23173, United States
| | - Michael R Rodriguez
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, Virginia USA 23173, United States
| | - Tyler G Chong
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, Virginia USA 23173, United States
| | - Kevin Y Kim
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, Virginia USA 23173, United States
| | - C Wade Downey
- Department of Chemistry, University of Richmond, 138 UR Drive, Richmond, Virginia USA 23173, United States
| |
Collapse
|
4
|
Futaki E, Takeda N, Yasui M, Shinada T, Miyata O, Ueda M. γ-C (sp 3)-H bond functionalisation of α,β-unsaturated amides through an umpolung strategy. Org Biomol Chem 2020; 18:1563-1566. [PMID: 32030394 DOI: 10.1039/d0ob00125b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nucleophilic γ-phenylation and γ-alkylation of α,β-unsaturated amides have been developed. This umpolung reaction allows the regioselective introduction of phenyl and alkyl groups to a vinylketene N,O-acetal, which is generated in situ from an α,β-unsaturated N-alkoxyamide, followed by N-O bond cleavage in a two-step, one-pot process.
Collapse
Affiliation(s)
- Erika Futaki
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Norihiko Takeda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Motohiro Yasui
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Tetsuro Shinada
- Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan. and Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| |
Collapse
|
5
|
Yang S, Zhu S, Lu D, Gong Y. Polarity-Reversed Addition of Enol Ethers to Imines under Visible Light: Redox-Neutral Access to Azide-Containing Amino Acids. Org Lett 2019; 21:8464-8468. [DOI: 10.1021/acs.orglett.9b03238] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sen Yang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Shuangyu Zhu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Dengfu Lu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China
| |
Collapse
|
6
|
Downey CW, Dixon GJ, Ingersoll JA, Fuller CN, MacCormac KW, Takashima A, Sediqui R. One-pot enol silane formation-Mukaiyama aldol reactions: Crossed aldehyde-aldehyde coupling, thioester substrates, and reactions in ester solvents. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
7
|
Downey CW, Confair DN, Liu Y, Heafner ED. One-Pot Enol Silane Formation–Alkylation of Ketones with Propargyl Carboxylates Promoted by Trimethylsilyl Trifluoromethanesulfonate. J Org Chem 2018; 83:12931-12938. [DOI: 10.1021/acs.joc.8b01997] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- C. Wade Downey
- Gottwald Center for the Sciences, University of Richmond, 28 Westhampton Way, Richmond, Virginia 23173, United States
| | - Danielle N. Confair
- Gottwald Center for the Sciences, University of Richmond, 28 Westhampton Way, Richmond, Virginia 23173, United States
| | - Yiqi Liu
- Gottwald Center for the Sciences, University of Richmond, 28 Westhampton Way, Richmond, Virginia 23173, United States
| | - Elizabeth D. Heafner
- Gottwald Center for the Sciences, University of Richmond, 28 Westhampton Way, Richmond, Virginia 23173, United States
| |
Collapse
|
8
|
Downey CW, Glist HM, Takashima A, Bottum SR, Dixon GJ. Chalcone and cinnamate synthesis via one-pot enol silane formation-Mukaiyama aldol reactions of ketones and acetate esters. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.06.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
9
|
Enzymatic Synthesis of Thioesters from Thiols and Vinyl Esters in a Continuous-Flow Microreactor. Catalysts 2018. [DOI: 10.3390/catal8060249] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
|
10
|
Takeda N, Futaki E, Kobori Y, Ueda M, Miyata O. Nucleophilic Arylation of N
,O
-Ketene Acetals with Triaryl Aluminum Reagents: Access to α-Aryl Amides through an Umpolung Process. Angew Chem Int Ed Engl 2017; 56:16342-16346. [DOI: 10.1002/anie.201708665] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Norihiko Takeda
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Erika Futaki
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Yukiko Kobori
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| |
Collapse
|
11
|
Wang G, Sararuk C, Li ZX, Li CS, Wang H, Zhang SJ. Studies on mild catalytic synthesis of methyl acrylate via one-step aldol reaction. AIChE J 2017. [DOI: 10.1002/aic.16022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Gang Wang
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Chidchon Sararuk
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Zeng-Xi Li
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Chun-Shan Li
- College of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Hui Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, The National Key Laboratory of Clean and Efficient Coking Technology, Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P.R. China
| | - Suo-Jiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, The National Key Laboratory of Clean and Efficient Coking Technology, Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P.R. China
| |
Collapse
|
12
|
Takeda N, Futaki E, Kobori Y, Ueda M, Miyata O. Nucleophilic Arylation of N
,O
-Ketene Acetals with Triaryl Aluminum Reagents: Access to α-Aryl Amides through an Umpolung Process. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708665] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Norihiko Takeda
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Erika Futaki
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Yukiko Kobori
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Masafumi Ueda
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| | - Okiko Miyata
- Kobe Pharmaceutical University; Motoyamakita; Higashinada Kobe 658-8558 Japan
| |
Collapse
|
13
|
Hajra S, Bhosale SS, Hazra A. An asymmetric acetate-Mannich reaction of chiral isatin derived ketimines and its applications. Org Biomol Chem 2017; 15:9217-9225. [PMID: 29082414 DOI: 10.1039/c7ob02407j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient TMSOTf-mediated asymmetric acetate-Mannich reaction of isatin derived tert-butylsulfinyl ketimines and S-phenyl thioacetate was developed to afford the direct synthesis of indole-based β3,3-amino acid thioester with excellent selectivity (dr > 98 : 2). Syntheses of (+)-AG-041R and 3-aminopyrroloindoline have been accomplished utilizing the developed method.
Collapse
Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India.
| | | | | |
Collapse
|