1
|
Li Y, Liang C. Cerium(
III
) triflate–catalyzed cycloaddition reaction in aqueous conditions to substituted naphthotriazolediones. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ya‐Syuan Li
- Department of Chemistry National Chung Hsing University Taichung Taiwan
| | - Chien‐Fu Liang
- Department of Chemistry National Chung Hsing University Taichung Taiwan
| |
Collapse
|
2
|
Probasco KC, Jennings MP. Stereoselective Halo-Succinimide Facilitated α-Halogenations of Substituted α-Trialkylsilyl-β-Substituted-α,β-Unsaturated Esters. J Org Chem 2021; 86:8945-8954. [PMID: 34161091 DOI: 10.1021/acs.joc.1c00876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The NXS (X = Cl, Br)-mediated halogenation of a series of (E)-α-trimethylsilyl-β-alkyl(aryl)-α,β-unsaturated esters in dimethylformamide (DMF) has furnished (Z)-β-substituted-α-halogenated-α,β-unsaturated ester products in moderate to high isolated yields (58-90%) with dr values of >20:1 coupled with the inversion of olefin stereochemistry. The reaction process was hypothesized to include an initial halonium cation intermediate, followed by regioselective ring opening with DMF. Subsequent anti-E2-type concomitant elimination allowed for the stereoselective formation of the product vinylic bromo-and chloroesters.
Collapse
Affiliation(s)
- Kristina C Probasco
- Department of Chemistry and Biochemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, Alabama 35487-0336, United States
| | - Michael P Jennings
- Department of Chemistry and Biochemistry, The University of Alabama, 250 Hackberry Lane, Tuscaloosa, Alabama 35487-0336, United States
| |
Collapse
|
3
|
Elinburg JK, Hyre AS, McNeely J, Alam TM, Klenner S, Pöttgen R, Rheingold AL, Doerrer LH. Formation of monomeric Sn(ii) and Sn(iv) perfluoropinacolate complexes and their characterization by 119Sn Mössbauer and 119Sn NMR spectroscopies. Dalton Trans 2020; 49:13773-13785. [PMID: 33000834 DOI: 10.1039/d0dt02837a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a series of Sn(ii) and Sn(iv) complexes supported by the highly electron-withdrawing dianionic perfluoropinacolate (pinF) ligand are reported herein. Three analogs of [SnIV(pinF)3]2- with NEt3H+ (1), K+ (2), and {K(18C6)}+ (3) counter cations and two analogs of [SnII(pinF)2]2- with K+ (4) and {K(15C5)2}+ (5) counter cations were prepared and characterized by standard analytical methods, single-crystal X-ray diffraction, and 119Sn Mössbauer and NMR spectroscopies. The six-coordinate SnIV(pinF) complexes display 119Sn NMR resonances and 119Sn Mössbauer spectra similar to SnO2 (cassiterite). In contrast, the four-coordinate SnII(pinF) complexes, featuring a stereochemically-active lone pair, possess low 119Sn NMR chemical shifts and relatively high quadrupolar splitting. Furthermore, the Sn(ii) complexes are unreactive towards both Lewis bases (pyridine, NEt3) and acids (BX3, Et3NH+). Calculations confirm that the Sn(ii) lone pair is localized within the 5s orbital and reveal that the Sn 5px LUMO is energetically inaccessible, which effectively abates reactivity.
Collapse
Affiliation(s)
- Jessica K Elinburg
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA.
| | | | | | | | | | | | | | | |
Collapse
|
4
|
Li J, Li Y, Sun J, Gui Y, Huang Y, Zha Z, Wang Z. Copper-catalyzed enantioselective Mukaiyama aldol reaction of silyl enol ethers with isatins. Chem Commun (Camb) 2019; 55:6309-6312. [PMID: 31089588 DOI: 10.1039/c9cc02159k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A highly enantioselective Mukaiyama aldol reaction of silyl enol ethers with isatins catalyzed by chiral copper complexes was developed. A series of chiral 3-substituted 3-hydroxy-2-oxindoles bearing a tetra-substituted center could be obtained exclusively with high yields (up to 95%) and excellent enantioselectivities (up to 99%). In particular, water was essential to improve the diastereoselectivity.
Collapse
Affiliation(s)
- Jindong Li
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences, Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials Science in University of Science and Technology of China, Hefei, 230026, P. R. China.
| | | | | | | | | | | | | |
Collapse
|
5
|
Di Y, Yoshimura T, Naito SI, Kimura Y, Kondo T. Homogeneous Sc(OTf) 3-Catalyzed Direct Allylation Reactions of General Alcohols with Allylsilanes. ACS OMEGA 2018; 3:18885-18894. [PMID: 31458450 PMCID: PMC6643996 DOI: 10.1021/acsomega.8b01627] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Accepted: 11/27/2018] [Indexed: 06/10/2023]
Abstract
Homogeneous Sc(OTf)3 used in nitromethane showed excellent catalytic activity for the direct allylation reactions of general alcohols including benzylic, propargylic, allylic, and some aliphatic alcohols with allyltrimethylsilane under mild and neutral reaction conditions. Metal-free β-silyl-substituted carbocations are intermediates generated by the highly oxophilic Sc(OTf)3-assisted rapid removal of a hydroxyl group in alcohols, which is supported by the result that allylation of (R)-1-(naphthalen-2-yl)ethan-1-ol with allytrimethylsilanes using the Sc(OTf)3 catalyst combined with (R)- or (S)-[1,1'-binaphthalene]-2,2'-diol ligands gave only racemic 2-(pent-4-en-2-yl)naphthalene in quantitative yield. The present study resolves the argument about the uncertain catalytic activity of Sc(OTf)3.
Collapse
Affiliation(s)
- Yuanjun Di
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of
Engineering, and Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Tsutomu Yoshimura
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of
Engineering, and Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shun-ichi Naito
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of
Engineering, and Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yu Kimura
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of
Engineering, and Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Teruyuki Kondo
- Department
of Energy and Hydrocarbon Chemistry, Graduate School of
Engineering, and Center for the Promotion of Interdisciplinary Education and Research, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| |
Collapse
|
6
|
Johnson DA, Mueller Hendrix AJ, Jennings MP. Diastereoselective Syntheses of (E)-α-Trialkylsilyl α,β-Unsaturated Esters, α-Silane-Substituted Conjugated Silyl Ketene Acetals, and α,γ-Substituted Allylsilanes. J Org Chem 2018; 83:9914-9928. [DOI: 10.1021/acs.joc.8b01209] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David A. Johnson
- Department of Chemistry, The University of Alabama, 250 Hackberry
Lane, Tuscaloosa, Alabama 35487-0336, United States
| | - Amanda J. Mueller Hendrix
- Department of Chemistry, The University of Alabama, 250 Hackberry
Lane, Tuscaloosa, Alabama 35487-0336, United States
| | - Michael P. Jennings
- Department of Chemistry, The University of Alabama, 250 Hackberry
Lane, Tuscaloosa, Alabama 35487-0336, United States
| |
Collapse
|
7
|
Yamashita Y, Yasukawa T, Yoo WJ, Kitanosono T, Kobayashi S. Catalytic enantioselective aldol reactions. Chem Soc Rev 2018; 47:4388-4480. [DOI: 10.1039/c7cs00824d] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recent developments in catalytic asymmetric aldol reactions have been summarized.
Collapse
Affiliation(s)
- Yasuhiro Yamashita
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Tomohiro Yasukawa
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Woo-Jin Yoo
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Taku Kitanosono
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Shū Kobayashi
- Department of Chemistry
- School of Science
- The University of Tokyo
- Bunkyo-ku
- Japan
| |
Collapse
|
8
|
Wang P, Li HF, Zhao JZ, Du ZH, Da CS. Organocatalytic Enantioselective Cross-Aldol Reaction of o-Hydroxyarylketones and Trifluoromethyl Ketones. Org Lett 2017; 19:2634-2637. [DOI: 10.1021/acs.orglett.7b00828] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pei Wang
- Institute
of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Hong-Feng Li
- Institute
of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jia-Zhen Zhao
- Institute
of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Hong Du
- Institute
of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Chao-Shan Da
- Institute
of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
- State
Key Laboratory of Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- Key
Lab of Preclinical Study for New Drugs of Gansu Province, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
9
|
|
10
|
Xu D, Jin R, Liu W, Ba F, Li Y, Ding A, Guo H. Neodymium-catalyzed intramolecular alkyne-hydroarylation with arenes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
11
|
Zeng R, Bao L, Sheng H, Sun L, Chen M, Feng Y, Zhu M. Heterobimetallic dinuclear lanthanide alkoxide complexes as acid–base bifunctional catalysts for synthesis of carbamates under solvent-free conditions. RSC Adv 2016. [DOI: 10.1039/c6ra15160d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Heterobimetallic dinuclear lanthanide alkoxide complexes Ln2Na8(OCH2CH2NMe2)12(OH)2 [Ln: I (Nd), II (Sm), III (Yb) and IV (Y)] were used as efficient acid–base bifunctional catalysts for the synthesis of carbamates and the N-Boc protection of amines.
Collapse
Affiliation(s)
- Ruijie Zeng
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Linquan Bao
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Hongting Sheng
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Lili Sun
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Man Chen
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Yan Feng
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| | - Manzhou Zhu
- School of Chemistry and Chemical Engineering
- Center for Atomic Engineering of Advanced Materials
- Anhui University
- Hefei 230039
- P. R. China
| |
Collapse
|
12
|
Zheng PF, Ouyang Q, Niu SL, Shuai L, Yuan Y, Jiang K, Liu TY, Chen YC. Enantioselective [4 + 1] Annulation Reactions of α-Substituted Ammonium Ylides To Construct Spirocyclic Oxindoles. J Am Chem Soc 2015; 137:9390-9. [PMID: 26151623 DOI: 10.1021/jacs.5b04792] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Peng-Fei Zheng
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Qin Ouyang
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Sheng-Li Niu
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Li Shuai
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Yi Yuan
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Kun Jiang
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Tian-Yu Liu
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Ying-Chun Chen
- College
of Pharmacy, Third Military Medical University, Chongqing 400038, China
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, and State Key Laboratory
of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
13
|
Robinson JR, Gu J, Carroll PJ, Schelter EJ, Walsh PJ. Exchange Processes in Shibasaki’s Rare Earth Alkali Metal BINOLate Frameworks and Their Relevance in Multifunctional Asymmetric Catalysis. J Am Chem Soc 2015; 137:7135-44. [DOI: 10.1021/jacs.5b02201] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jerome R. Robinson
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Jun Gu
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Walsh
- P. Roy and Diana T. Vagelos Laboratories,
Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|