1
|
Velado M, Martinović M, Alonso I, Tortosa M, Fernández de la Pradilla R, Viso A. Base-Induced Sulfoxide-Sulfenate Rearrangement of 2-Sulfinyl Dienes for the Regio- and Stereoselective Synthesis of Enantioenriched Dienyl Diols. J Org Chem 2023; 88:3697-3713. [PMID: 36868575 PMCID: PMC10028699 DOI: 10.1021/acs.joc.2c02931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Indexed: 03/05/2023]
Abstract
The base-induced [2,3]-sigmatropic rearrangement of a series of enantiopure 2-sulfinyl dienes has been examined and optimized using a combination of NaH and iPrOH. The reaction takes place by allylic deprotonation of the 2-sulfinyl diene to give a bis-allylic sulfoxide anion intermediate that after protonation undergoes sulfoxide-sulfenate rearrangement. Different substitution at the starting 2-sulfinyl dienes has allowed us to study the rearrangement finding that a terminal allylic alcohol is determinant to achieve complete regioselectivity and high enantioselectivities (90:10-95:5) with the sulfoxide as the only element of stereocontrol. Density functional theory (DFT) calculations provide an interpretation of these results.
Collapse
Affiliation(s)
- Marina Velado
- Instituto
de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Manuel Martinović
- Instituto
de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Inés Alonso
- Organic
Chemistry Department and Center for Innovation in Advanced Chemistry
(ORFEO-CINQA) Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - Mariola Tortosa
- Organic
Chemistry Department and Center for Innovation in Advanced Chemistry
(ORFEO-CINQA) Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | | | - Alma Viso
- Instituto
de Química Orgánica General (IQOG), CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| |
Collapse
|
2
|
Thorat SS, Kontham R. Strategies for the synthesis of furo-pyranones and their application in the total synthesis of related natural products. Org Chem Front 2021. [DOI: 10.1039/d0qo01421d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The furo-pyranone framework is widely present in the molecular structure of various biologically potent natural products and un-natural small molecules, and it represents a valuable target in synthetic organic chemistry and medicinal chemistry.
Collapse
Affiliation(s)
- Sagar S. Thorat
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Ravindar Kontham
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| |
Collapse
|
3
|
Velado M, Fernández de la Pradilla R, Viso A. Diastereodivergent Synthesis of 2-Ene-1,4-hydroxy Sulfides from 2-Sulfinyl Dienes via Tandem Sulfa-Michael/Sulfoxide-Sulfenate Rearrangement. Org Lett 2021; 23:202-206. [PMID: 33300806 DOI: 10.1021/acs.orglett.0c03929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The highly diastereoselective sulfa-Michael addition of thiolates to enantiopure 2-sulfinyl dienes leads to anti or syn 2-ene-1,4-hydroxy sulfides in good yields and selectivities dependent on the reaction conditions in a diastereodivergent process. Synthetic applications of these enantiopure hydroxy sulfides by subsequent sigmatropic rearrangements have been outlined.
Collapse
Affiliation(s)
- Marina Velado
- Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | | | - Alma Viso
- Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| |
Collapse
|
4
|
Castellanos A, Osante I, Fernández J, Fernández de la Pradilla R, Viso A. Oxidative reactions of sulfinyl dienes as an entry to functionalized carbohydrate-like products and furans. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
5
|
Kaiser D, Klose I, Oost R, Neuhaus J, Maulide N. Bond-Forming and -Breaking Reactions at Sulfur(IV): Sulfoxides, Sulfonium Salts, Sulfur Ylides, and Sulfinate Salts. Chem Rev 2019; 119:8701-8780. [PMID: 31243998 PMCID: PMC6661881 DOI: 10.1021/acs.chemrev.9b00111] [Citation(s) in RCA: 465] [Impact Index Per Article: 93.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Indexed: 12/13/2022]
Abstract
Organosulfur compounds have long played a vital role in organic chemistry and in the development of novel chemical structures and architectures. Prominent among these organosulfur compounds are those involving a sulfur(IV) center, which have been the subject of countless investigations over more than a hundred years. In addition to a long list of textbook sulfur-based reactions, there has been a sustained interest in the chemistry of organosulfur(IV) compounds in recent years. Of particular interest within organosulfur chemistry is the ease with which the synthetic chemist can effect a wide range of transformations through either bond formation or bond cleavage at sulfur. This review aims to cover the developments of the past decade in the chemistry of organic sulfur(IV) molecules and provide insight into both the wide range of reactions which critically rely on this versatile element and the diverse scaffolds that can thereby be synthesized.
Collapse
Affiliation(s)
- Daniel Kaiser
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Immo Klose
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Rik Oost
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - James Neuhaus
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Nuno Maulide
- Institute
of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| |
Collapse
|
6
|
Yao Y, Xiong CP, Zhong YL, Bian GW, Huang NY, Wang L, Zou K. Intramolecular and Ferrier Rearrangement Strategy for the Construction of C1-β-d-xylopyranosides: Synthesis, Mechanism and Biological Activity Study. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801423] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yuan Yao
- Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| | - Cai-Ping Xiong
- Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| | - Ya-Ling Zhong
- Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| | - Guo-Wei Bian
- Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| | - Nian-Yu Huang
- Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| | - Long Wang
- College of Materials and Chemical Engineering; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| | - Kun Zou
- Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences; China Three Gorges University, Yichang; Hubei 443002 People's Republic of China
| |
Collapse
|
7
|
Buttar S, Caine J, Goné E, Harris R, Gillman J, Atienza R, Gupta R, Sogi KM, Jain L, Abascal NC, Levine Y, Repka LM, Rojas CM. Glycal Metallanitrenes for 2-Amino Sugar Synthesis: Amidoglycosylation of Gulal-, Allal-, Glucal-, and Galactal 3-Carbamates. J Org Chem 2018; 83:8054-8080. [PMID: 29979042 PMCID: PMC6662188 DOI: 10.1021/acs.joc.8b00893] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The rhodium(II)-catalyzed oxidative cyclization of glycal 3-carbamates with in situ incorporation of an alcohol nucleophile at the anomeric position provides access to a range of 2-amino sugars having 1,2-trans-2,3-cis stereochemistry, a structural motif present in compounds of medicinal and biological significance such as the streptothricin group of antibiotics and the Chitinase inhibitor allosamidin. All of the diastereomeric d-glycal 3-carbamates have been investigated, revealing significant differences in anomeric stereoselectivity depending on substrate stereochemistry and protecting groups. In addition, some substrates were prone to forming C3-oxidized dihydropyranone byproducts under the reaction conditions. Allal- and gulal 3-carbamates provided uniformly high stereo- and chemoselectivity, while for glucal substrates, acyclic, electron-withdrawing protecting groups at the 4 O and 6 O positions were required. Galactal 3-carbamates have been the most challenging substrates; formation of their amidoglycosylation products is most effective with an electron-withdrawing 6 O-Ts substituent and a sterically demanding 4 O-TBS group. These results suggest a mechanism whereby conformational and electronic factors determine the partitioning of an intermediate acyl nitrenoid between alkene addition, leading to amidoglycosylation, and C3-H insertion, providing the dihydropyranone byproduct. Along the amidoglycosylation pathway, high anomeric selectivity results when a glycosyl aziridine intermediate is favored over an aziridine-opened oxocarbenium donor.
Collapse
Affiliation(s)
- Simran Buttar
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Julia Caine
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Evelyne Goné
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Reneé Harris
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Jennifer Gillman
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Roxanne Atienza
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Ritu Gupta
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Kimberly M. Sogi
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Lauren Jain
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Nadia C. Abascal
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Yetta Levine
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Lindsay M. Repka
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Christian M. Rojas
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| |
Collapse
|
8
|
Hirai T, Shibata K, Niwano Y, Shiozaki M, Hashimoto Y, Morita N, Ban S, Tamura O. Total Synthesis of Neodysiherbaine A via 1,3-Dipolar Cycloaddition of a Chiral Nitrone Template. Org Lett 2017; 19:6320-6323. [PMID: 29155598 DOI: 10.1021/acs.orglett.7b03092] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total synthesis of neodysiherbaine A was achieved via 1,3-dipolar cycloaddition of a chiral nitrone template with a sugar-derived allyl alcohol in the presence of MgBr2·OEt2. This cycloaddition constructed the C2 and C4 asymmetric centers in a single step. Then reductive cleavage, intramolecular SN2 reaction of the tertiary alcohol, and oxidation of the primary alcohol afforded neodysiherbaine A.
Collapse
Affiliation(s)
- Toshihiro Hirai
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Kohki Shibata
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Yohei Niwano
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Masao Shiozaki
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Yoshimitsu Hashimoto
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Nobuyoshi Morita
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Shintaro Ban
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Osamu Tamura
- Showa Pharmaceutical University , Higashi-Tamagawagakuen, Machida, Tokyo 194-8543, Japan
| |
Collapse
|
9
|
Colomer I, Velado M, Fernández de la Pradilla R, Viso A. From Allylic Sulfoxides to Allylic Sulfenates: Fifty Years of a Never-Ending [2,3]-Sigmatropic Rearrangement. Chem Rev 2017; 117:14201-14243. [DOI: 10.1021/acs.chemrev.7b00428] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Ignacio Colomer
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas (IQOG-CSIC), Juan de la Cierva 3, 28006-Madrid, Spain
| | - Marina Velado
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas (IQOG-CSIC), Juan de la Cierva 3, 28006-Madrid, Spain
| | - Roberto Fernández de la Pradilla
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas (IQOG-CSIC), Juan de la Cierva 3, 28006-Madrid, Spain
| | - Alma Viso
- Instituto de Química Orgánica General, Consejo Superior de Investigaciones Científicas (IQOG-CSIC), Juan de la Cierva 3, 28006-Madrid, Spain
| |
Collapse
|
10
|
Simal C, Bates RH, Ureña M, Giménez I, Koutsou C, Infantes L, Fernández de la Pradilla R, Viso A. Synthesis of Enantiopure 3-Hydroxypiperidines from Sulfinyl Dienyl Amines by Diastereoselective Intramolecular Cyclization and [2,3]-Sigmatropic Rearrangement. J Org Chem 2015; 80:7674-92. [PMID: 26162504 DOI: 10.1021/acs.joc.5b01307] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The highly diastereoselective base-promoted intramolecular cyclization of a variety of enantiopure sulfinyl dienyl amines provides novel sulfinyl tetrahydropyridines that are readily converted to 3-hydroxy tetrahydropyridines via sigmatropic rearrangement. The influence of N- and C- substituents on the process has been studied. Procedures to shorten the sequence such as the tandem cyclization followed by [2,3]-sigmatropic rearrangement, as well as cyclization of the free amine, under Boc- or ArSO- deprotection conditions have been examined. Good to excellent levels of selectivity are generally observed for the reported transformations (dr: 75/25 to >98/2). A novel protocol to access substituted amino dienyl sulfoxides is also reported.
Collapse
Affiliation(s)
- Carmen Simal
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Robert H Bates
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Mercedes Ureña
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Irene Giménez
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Christina Koutsou
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Lourdes Infantes
- ‡Instituto de Química Física Rocasolano, IQFR-CSIC, Serrano 119, 28006 Madrid, Spain
| | | | - Alma Viso
- †Instituto de Química Orgánica General, IQOG-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| |
Collapse
|
11
|
Fernández de la Pradilla R, Velado M, Colomer I, Simal C, Viso A, Gornitzka H, Hemmert C. Remote stereocontrol in the synthesis of acyclic 1,4-diols and 1,4-aminoalcohols from 2-sulfinyl dienes. Org Lett 2014; 16:5200-3. [PMID: 25252268 DOI: 10.1021/ol502592y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The highly diastereoselective conjugate addition of alcohols and amines (RXH) to enantiopure 2-sulfinyl dienes renders transient allylic sulfoxides which undergo sulfoxide-sulfenate rearrangement and sulfenate cleavage providing 2-ene-1,4-diols and 2-ene-1,4-aminoalcohols with up to 99:1 dr. The method allows for the generation of two stereocenters in a single synthetic operation with remote chirality transfer of one center into the other.
Collapse
|
12
|
Bartlett MJ, Northcote PT, Lein M, Harvey JE. 13C NMR Analysis of 3,6-Dihydro-2H-pyrans: Assignment of Remote Stereochemistry Using Axial Shielding Effects. J Org Chem 2014; 79:5521-32. [DOI: 10.1021/jo500678k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Mark J. Bartlett
- School of Chemical and Physical
Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Peter T. Northcote
- School of Chemical and Physical
Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Matthias Lein
- School of Chemical and Physical
Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| | - Joanne E. Harvey
- School of Chemical and Physical
Sciences, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand
| |
Collapse
|
13
|
|
14
|
Highly chemoselective synthesis of aryl allylic sulfoxides through calcium hypobromite oxidation of aryl allylic sulfides. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.12.046] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Donohoe TJ, Callens CKA, Lacy AR, Winter C. Tethered Aminohydroxylation Reaction and Its Application to Total Synthesis. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101464] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Timothy J. Donohoe
- Department of Chemistry, Chemical Research Laboratories, University of Oxford, Mansfield Road, Oxford OX1 1RU, UK, Fax: +44‐1865‐275708
| | - Cedric K. A. Callens
- Department of Chemistry, Chemical Research Laboratories, University of Oxford, Mansfield Road, Oxford OX1 1RU, UK, Fax: +44‐1865‐275708
| | - Adam R. Lacy
- Department of Chemistry, Chemical Research Laboratories, University of Oxford, Mansfield Road, Oxford OX1 1RU, UK, Fax: +44‐1865‐275708
| | - Christian Winter
- Department of Chemistry, Chemical Research Laboratories, University of Oxford, Mansfield Road, Oxford OX1 1RU, UK, Fax: +44‐1865‐275708
| |
Collapse
|
16
|
Donohoe TJ, Lacy AR, Rathi AH, Walter DS. The Influence of Exocyclic Stereochemistry on the Tethered Aminohydroxylation Reaction. Chem Asian J 2011; 6:3214-22. [DOI: 10.1002/asia.201100497] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Indexed: 11/10/2022]
|
17
|
Fernández de la Pradilla R, Colomer I, Ureña M, Viso A. Enantiopure 1,4-diols and 1,4-aminoalcohols via stereoselective acyclic sulfoxide-sulfenate rearrangement. Org Lett 2011; 13:2468-71. [PMID: 21469662 DOI: 10.1021/ol200718y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Treatment of acyclic α-hydroxy and α-tosylamino sulfinyl dienes with amines affords enantiopure 1,4-diol or 1,4-hydroxysulfonamide derivatives in good yields and diastereoselectivities. This one-pot procedure entails a conjugate addition that triggers a diastereoselective sulfoxide-sulfenate [2,3]-sigmatropic rearrangement.
Collapse
|
18
|
Donohoe TJ, Callens CKA, Flores A, Lacy AR, Rathi AH. Recent Developments in Methodology for the Direct Oxyamination of Olefins. Chemistry 2010; 17:58-76. [DOI: 10.1002/chem.201002323] [Citation(s) in RCA: 220] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
19
|
Krause JG, Leskiw BD, Emery ML, McGahan ME, McCourt MP, Priefer R. Synthesis of substituted N-hydroxyureas via the in situ generation of t-butoxy isocyanate. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
|
21
|
Bernoud E, Le Duc G, Bantreil X, Prestat G, Madec D, Poli G. Aryl sulfoxides from allyl sulfoxides via [2,3]-sigmatropic rearrangement and domino Pd-catalyzed generation/arylation of sulfenate anions. Org Lett 2010; 12:320-3. [PMID: 20000488 DOI: 10.1021/ol902620t] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Allylic sulfoxides, via [2,3]-sigmatropic rearrangement and oxidative addition of the resulting allylic sulfenate esters to Pd(0), are found to be excellent precursors of sulfenate anions. This hitherto unknown reactivity is applied in a new Pd(0)-catalyzed domino sequence involving sulfenate anion generation followed by arylation to afford aryl sulfoxides.
Collapse
Affiliation(s)
- Elise Bernoud
- Université Pierre et Marie Curie-Paris 6, Laboratoire de Chimie organique (UMR CNRS 7611), Institut de Chimie Moléculaire (FR 2769), Case 183, 4 Place Jussieu, F-75252, Paris Cedex 05, France
| | | | | | | | | | | |
Collapse
|
22
|
Panda MK, Shaikh MM, Ghosh P. Controlled oxidation of organic sulfides to sulfoxides under ambient conditions by a series of titanium isopropoxide complexes using environmentally benign H2O2 as an oxidant. Dalton Trans 2010; 39:2428-40. [PMID: 20162218 DOI: 10.1039/b921720g] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Controlled oxidation of organic sulfides to sulfoxides under ambient conditions has been achieved by a series of titanium isopropoxide complexes that use environmentally benign H(2)O(2) as a primary oxidant. Specifically, the [N,N'-bis(2-oxo-3-R(1)-5-R(2)-phenylmethyl)-N,N'-bis(methylene-R(3))-ethylenediamine]Ti(O(i)Pr)(2) [R(1) = t-Bu, R(2) = Me, R(3) = C(7)H(5)O(2) (1b); R(1) = R(2) = t-Bu, R(3) = C(7)H(5)O(2) (2b); R(1) = R(2) = Cl, R(3) = C(7)H(5)O(2) (3b) and R(1) = R(2) = Cl, R(3) = C(6)H(5) (4b)] complexes efficiently catalyzed the sulfoxidation reactions of organic sulfides to sulfoxides at room temperature within 30 min of the reaction time using aqueous H(2)O(2) as an oxidant. A mechanistic pathway, modeled using density functional theory for a representative thioanisole substrate catalyzed by 4b, suggested that the reaction proceeds via a titanium peroxo intermediate 4c', which displays an activation barrier of 22.5 kcal mol(-1) (DeltaG(++)) for the overall catalytic cycle in undergoing an attack by the S atom of the thioanisole substrate at its sigma*-orbital of the peroxo moiety. The formation of the titanium peroxo intermediate was experimentally corroborated by a mild ionization atmospheric pressure chemical ionization (APCI) mass spectrometric technique.
Collapse
Affiliation(s)
- Manas K Panda
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076
| | | | | |
Collapse
|
23
|
Fernández de la Pradilla R, Lwoff N, Viso A. Stereoselective Functionalization of Dihydropyran-3-ols: Application to the Synthesis of Enantiopure Ethyl Deoxymonate B. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801133] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|