1
|
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
|
2
|
Abstract
Chiral salen-metal complexes are among the most versatile asymmetric catalysts and have found utility in fields ranging from materials chemistry to organic synthesis. These complexes are capable of inducing chirality in products formed from a wide variety of chemical processes, often with close to perfect stereoinduction. Salen ligands are tunable for steric as well as electronic properties, and their ability to coordinate a large number of metals gives the derived chiral salen-metal complex very broad utility in asymmetric catalysis. This review primarily summarizes developments in chiral salen-metal catalysis over the last two decades with particular emphasis on those applications of importance in asymmetric synthesis.
Collapse
Affiliation(s)
- Subrata Shaw
- Center for the Development of Therapeutics , Broad Institute of MIT and Harvard , 415 Main Street , Cambridge , Massachusetts 02142 , United States
| | - James D White
- Department of Chemistry , Oregon State University , Corvallis , Oregon 97331 , United States
| |
Collapse
|
3
|
Zhou NN, Ning SS, Tong XJ, Luo TT, Yang J, Li LQ, Fan MJ, Yang DS, Zhu HT. Brønsted-Acid-Catalyzed Synthesis of 3-Alkoxy and 3-Sulfamido Indanones via a Tandem Cyclization. J Org Chem 2019; 84:8497-8508. [DOI: 10.1021/acs.joc.9b00791] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ni-Ni Zhou
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Si-Si Ning
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Xiao-Juan Tong
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ting-Ting Luo
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Jin Yang
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Lin-Qiang Li
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Ming-Jin Fan
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - De-Suo Yang
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Hai-Tao Zhu
- Shannxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| |
Collapse
|
4
|
Zheng K, Liu X, Feng X. Recent Advances in Metal-Catalyzed Asymmetric 1,4-Conjugate Addition (ACA) of Nonorganometallic Nucleophiles. Chem Rev 2018; 118:7586-7656. [PMID: 30047721 DOI: 10.1021/acs.chemrev.7b00692] [Citation(s) in RCA: 191] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The metal-catalyzed asymmetric conjugate addition (ACA) reaction has emerged as a general and powerful approach for the construction of optically active compounds and is among the most significant and useful reactions in synthetic organic chemistry. In recent years, great progress has been made in this area with the use of various chiral metal complexes based on different chiral ligands. This review provides comprehensive and critical information on the enantioselective 1,4-conjugate addition of nonorganometallic (soft) nucleophiles and their importance in synthetic applications. The literature is covered from the last 10 years, and a number of examples from before 2007 are included as background information. The review is divided into multiple parts according to the type of nucleophile involved in the reaction (such as C-, B-, O-, N-, S-, P-, and Si-centered nucleophiles) and metal catalyst systems used.
Collapse
Affiliation(s)
- Ke Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| |
Collapse
|
5
|
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
|
6
|
Ghosh M, Ray JK. Ten years advancement in the synthetic applications of 2-bromo-cyclohexenecarbaldehydes and 2-bromobenzaldehydes and derived substrates under palladium-catalyzed cross-coupling conditions. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
7
|
Du GF, Zou XL, Dai B, He L. N-heterocyclic carbene catalyzed additions of 3-trimethylsilyl propiolate to aldehydes. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2013.12.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
8
|
|
9
|
Qin G, Chen X, Yang L, Huang H. Copper-Catalyzed α-Benzylation of Enones via Radical-Triggered Oxidative Coupling of Two C–H Bonds. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00310] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guiping Qin
- State Key Laboratory for
Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical
Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
| | - Xiangning Chen
- State Key Laboratory for
Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical
Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
| | - Lei Yang
- State Key Laboratory for
Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical
Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
| | - Hanmin Huang
- State Key Laboratory for
Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical
Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
| |
Collapse
|
10
|
Affiliation(s)
- Nilanjana Majumdar
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
- Institute of Microbial Chemistry, Tokyo, 3-14-23 Kamiosaki,
Shinagawa-ku, Tokyo 141-0021, Japan
| | - Nanda D. Paul
- Homogeneous
and Supramolecular Catalysis Group, Van ’t Hoff Institute for
Molecular Science (HIMS), University of Amsterdam (UvA), Science
Park 904, 1098 XH Amsterdam, The Netherlands
| | - Sutanuva Mandal
- Homogeneous
and Supramolecular Catalysis Group, Van ’t Hoff Institute for
Molecular Science (HIMS), University of Amsterdam (UvA), Science
Park 904, 1098 XH Amsterdam, The Netherlands
| | - Bas de Bruin
- Homogeneous
and Supramolecular Catalysis Group, Van ’t Hoff Institute for
Molecular Science (HIMS), University of Amsterdam (UvA), Science
Park 904, 1098 XH Amsterdam, The Netherlands
| | - William D. Wulff
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| |
Collapse
|
11
|
Liu Y, Kang TR, Liu QZ, Chen LM, Wang YC, Liu J, Xie YM, Yang JL, He L. Enantioselective [4 + 2] Cycloaddition of Cyclic N-Sulfimines and Acyclic Enones or Ynones: A Concise Route to Sulfamidate-Fused 2,6-Disubstituted Piperidin-4-ones. Org Lett 2013; 15:6090-3. [PMID: 24215326 DOI: 10.1021/ol402977w] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Tai-Ran Kang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lian-Mei Chen
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ya-Chuan Wang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jie Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yong-Mei Xie
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jin-Liang Yang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Long He
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
12
|
Barczak NT, Rooke DA, Menard ZA, Ferreira EM. Stereoselective Synthesis of Tetrasubstituted Olefins through a Halogen-Induced 1,2-Silyl Migration. Angew Chem Int Ed Engl 2013; 52:7579-82. [DOI: 10.1002/anie.201303007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Indexed: 11/09/2022]
|
13
|
Barczak NT, Rooke DA, Menard ZA, Ferreira EM. Stereoselective Synthesis of Tetrasubstituted Olefins through a Halogen-Induced 1,2-Silyl Migration. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
14
|
Kim HY, Li JY, Oh K. A Soft Vinyl Enolization Approach to α-Acylvinyl Anions: Direct Aldol/Aldol Condensation Reactions of (E)-β-Chlorovinyl Ketones. Angew Chem Int Ed Engl 2013; 52:3736-40. [DOI: 10.1002/anie.201209876] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 01/10/2013] [Indexed: 01/14/2023]
|
15
|
Kim HY, Li JY, Oh K. A Soft Vinyl Enolization Approach to α-Acylvinyl Anions: Direct Aldol/Aldol Condensation Reactions of (E)-β-Chlorovinyl Ketones. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209876] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
16
|
Boyce GR, Liu S, Johnson JS. Construction of cyclopentanol derivatives via three-component coupling of silyl glyoxylates, acetylides, and nitroalkenes. Org Lett 2012; 14:652-5. [PMID: 22235777 PMCID: PMC3265386 DOI: 10.1021/ol2033527] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The three-component coupling of Mg acetylides, silyl glyoxylates, and nitroalkenes results in a highly diastereoselective Kuwajima-Reich/vinylogous Michael cascade that provides tetrasubstituted silyloxyallene products. The regio- and diastereoselectivity were studied using DFT calculations. These silyloxyallenes were converted to cyclopentenols and cyclopentitols via a unique Lewis acid assisted Henry cyclization. The alkene functionality present in the cyclopentanol products can be elaborated using diastereoselective ketohydroxylation reactions.
Collapse
|
17
|
Brekan JA, Chernyak D, White KL, Scheidt KA. Lewis base-promoted carbon–carbon sp3–sp3 coupling reactions of α-silyl silylethers. Chem Sci 2012. [DOI: 10.1039/c2sc00581f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
18
|
Zhao D, Yang D, Wang Y, Wang Y, Wang L, Mao L, Wang R. Enantioselective Mannich reaction of a highly reactive Horner–Wadsworth–Emmons reagent with imines catalyzed by a bifunctional thiourea. Chem Sci 2011. [DOI: 10.1039/c1sc00351h] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
19
|
Lee SI, Moon SY, Hwang GS, Ryu DH. Facile Approach to Optically Active α-Alkylidene-β-amino Esters by Thermal Overman Rearrangement. Org Lett 2010; 12:3234-7. [DOI: 10.1021/ol1011746] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Il Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea, and Korea Basic Science Institute and Graduate School of Analytical Science and Technology, Chungnam National University, Seoul, 136-713, Korea
| | - Soon Young Moon
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea, and Korea Basic Science Institute and Graduate School of Analytical Science and Technology, Chungnam National University, Seoul, 136-713, Korea
| | - Geum-Sook Hwang
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea, and Korea Basic Science Institute and Graduate School of Analytical Science and Technology, Chungnam National University, Seoul, 136-713, Korea
| | - Do Hyun Ryu
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea, and Korea Basic Science Institute and Graduate School of Analytical Science and Technology, Chungnam National University, Seoul, 136-713, Korea
| |
Collapse
|
20
|
Brekan JA, Reynolds TE, Scheidt KA. Enantioselective Synthesis of Substituted Indanones from Silyloxyallenes. J Am Chem Soc 2010; 132:1472-3. [DOI: 10.1021/ja909669e] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jonathan A. Brekan
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208
| | - Troy E. Reynolds
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208
| | - Karl A. Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, Silverman Hall, Evanston, Illinois 60208
| |
Collapse
|
21
|
Zhang X, Zhang S, Wang W. Iminium-Allenamine Cascade Catalysis: One-Pot Access to Chiral 4H-Chromenes by a Highly Enantioselective Michael-Michael Sequence. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906050] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
22
|
Zhang X, Zhang S, Wang W. Iminium-Allenamine Cascade Catalysis: One-Pot Access to Chiral 4H-Chromenes by a Highly Enantioselective Michael-Michael Sequence. Angew Chem Int Ed Engl 2010; 49:1481-4. [DOI: 10.1002/anie.200906050] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xinshuai Zhang
- Department of Chemistry & Chemical Biology, University of New Mexico, MSC03 2060, Albuquerque, NM 87131-0001, USA
| | | | | |
Collapse
|
23
|
Bugarin A, Connell BT. Acceleration of the Morita-Baylis-Hillman reaction by a simple mixed catalyst system. J Org Chem 2009; 74:4638-41. [PMID: 19449847 DOI: 10.1021/jo900603w] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
By using a catalytic amount of 4-dimethylaminopyridine (DMAP) as a nucleophile in the presence of an equal amount of tetramethylethylenediamine (TMEDA) and MgI(2), Morita-Baylis-Hillman adducts can be obtained in good to excellent yields from various aromatic and aliphatic aldehydes and cyclic enones/enoates at room temperature after convenient reaction times.
Collapse
Affiliation(s)
- Alejandro Bugarin
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, USA
| | | |
Collapse
|
24
|
Senapati B, Hwang GS, Lee S, Ryu D. Enantioselective Synthesis of β-Iodo Morita-Baylis-Hillman Esters by a Catalytic Asymmetric Three-Component Coupling Reaction. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900351] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
25
|
Senapati B, Hwang GS, Lee S, Ryu D. Enantioselective Synthesis of β-Iodo Morita-Baylis-Hillman Esters by a Catalytic Asymmetric Three-Component Coupling Reaction. Angew Chem Int Ed Engl 2009; 48:4398-401. [DOI: 10.1002/anie.200900351] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
26
|
Arai T, Suemitsu Y, Ikematsu Y. Ni(0)-Catalyzed Conjugate Addition of Me3SiCN to Ynones: α-Bromo-β-cyano Tetrasubstituted Enones. Org Lett 2008; 11:333-5. [DOI: 10.1021/ol802508q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takayoshi Arai
- Department of Chemistry, Graduate School of Science, Chiba University, Inage 1-33, Chiba 263-8522, Japan
| | - Yuuki Suemitsu
- Department of Chemistry, Graduate School of Science, Chiba University, Inage 1-33, Chiba 263-8522, Japan
| | - Yui Ikematsu
- Department of Chemistry, Graduate School of Science, Chiba University, Inage 1-33, Chiba 263-8522, Japan
| |
Collapse
|
27
|
Reynolds TE, Binkley MS, Scheidt KA. Highly Selective α-Acylvinyl Anion Additions to Imines. Org Lett 2008; 10:5227-30. [DOI: 10.1021/ol802227t] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Troy E. Reynolds
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Michael S. Binkley
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| | - Karl A. Scheidt
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208
| |
Collapse
|
28
|
Reynolds TE, Binkley MS, Scheidt KA. Lewis acid-catalyzed conjugate additions of silyloxyallenes: a selective solution to the intermolecular Rauhut-Currier problem. Org Lett 2008; 10:2449-52. [PMID: 18476709 DOI: 10.1021/ol800745q] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Silyloxyallenes serve as highly useful alpha-acylvinyl anion equivalents. These latent allenolates undergo conjugate additions to alkylidene malonates in the presence of 10 mol % Sc(OTf) 3. The reaction delivers intermolecular Rauhut-Currier products in excellent yields and regioselectivities for a wide scope of substrates. Notably, the formal cross-coupling of two different alpha,beta-unsaturated carbonyl compounds (a cross Rauhut-Currier reaction) is achieved. Preliminary investigations have demonstrated good levels of enantioselectivity for the addition of a racemic silyloxyallene with a chiral Lewis acid.
Collapse
Affiliation(s)
- Troy E Reynolds
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
| | | | | |
Collapse
|
29
|
Mueller AJ, Jennings MP. Vicinal Functionalization of Propiolate Esters via a Tandem Catalytic Carbocupration−Mukaiyama Aldol Reaction Sequence. Org Lett 2008; 10:1649-52. [DOI: 10.1021/ol800373g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amanda J. Mueller
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336
| | - Michael P. Jennings
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336
| |
Collapse
|
30
|
Galliford CV, Scheidt KA. An unusual dianion equivalent from acylsilanes for the synthesis of substituted β-keto esters. Chem Commun (Camb) 2008:1926-8. [DOI: 10.1039/b801597j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Bioorganic Chemistry: Awards to C. Bertozzi, M. Movassaghi, and K. A. Scheidt. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/anie.200705135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
32
|
Bioorganische Chemie: Auszeichnungen für C. Bertozzi, M. Movassaghi und K. A. Scheidt. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200705135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|