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Roy P, Krishna AV, Ramachary DB. Direct Organocatalytic Reductive Alkylation of Syncarpic Acid: Scope and Applications. J Org Chem 2022; 87:16026-16038. [PMID: 36367306 DOI: 10.1021/acs.joc.2c02164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Biologically important 4-alkylsyncarpic acids, which resemble the core structure of many natural products, were synthesized in one-pot through the organocatalytic three-component reductive alkylation with excellent yields and C-selectivity. Synthetic applications of 4-alkylsyncarpic acids were demonstrated by converting into the functionally rich molecules through different reactions like Michael, retro-Michael, reduction, and oxidation reactions. In a continuation, formal total synthesis of (±)-triumphalone, (±)-isotriumphalone, and monomeric phloroglucinol derivatives was reported in a few steps starting from 4-alkylsyncarpic acids in overall very good yields. Further showcasing the importance of C-alkylated products, 4-benzylsyncarpic acid and its Michael adduct with methyl vinyl ketone were synthesized in a gram scale without compromising rate/yields.
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Affiliation(s)
- Pritam Roy
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Anugam V Krishna
- Catalysis Laboratory, School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
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2
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Sharma P, Gupta R, Bansal RK. Recent advances in organocatalytic asymmetric aza-Michael reactions of amines and amides. Beilstein J Org Chem 2021; 17:2585-2610. [PMID: 34760026 PMCID: PMC8551878 DOI: 10.3762/bjoc.17.173] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/27/2021] [Indexed: 11/23/2022] Open
Abstract
Nitrogen-containing scaffolds are ubiquitous in nature and constitute an important class of building blocks in organic synthesis. The asymmetric aza-Michael reaction (aza-MR) alone or in tandem with other organic reaction(s) is an important synthetic tool to form new C-N bond(s) leading to developing new libraries of diverse types of bioactive nitrogen compounds. The synthesis and application of a variety of organocatalysts for accomplishing highly useful organic syntheses without causing environmental pollution in compliance with 'Green Chemistry" has been a landmark development in the recent past. Application of many of these organocatalysts has been extended to asymmetric aza-MR during the last two decades. The present article overviews the literature published during the last 10 years concerning the asymmetric aza-MR of amines and amides catalysed by organocatalysts. Both types of the organocatalysts, i.e., those acting through non-covalent interactions and those working through covalent bond formation have been applied for the asymmetric aza-MR. Thus, the review includes the examples wherein cinchona alkaloids, squaramides, chiral amines, phase-transfer catalysts and chiral bifunctional thioureas have been used, which activate the substrates through hydrogen bond formation. Most of these reactions are accompanied by high yields and enantiomeric excesses. On the other hand, N-heterocyclic carbenes and chiral pyrrolidine derivatives acting through covalent bond formation such as the iminium ions with the substrates have also been included. Wherever possible, a comparison has been made between the efficacies of various organocatalysts in asymmetric aza-MR.
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Affiliation(s)
- Pratibha Sharma
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| | - Raakhi Gupta
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| | - Raj Kumar Bansal
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
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3
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Li F, Yang Z, Yang Y, Huang Q, Chen X, Li P, Dong M, Li W. Organocatalytic Enantioselective Aza‐Michael Addition of Arylamines to 7‐Methide‐7
H
‐Indoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Fushuai Li
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University, Qingdao Shandong 266021 People's Republic of China
| | - Zhihong Yang
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University, Qingdao Shandong 266021 People's Republic of China
| | - Yanyan Yang
- Department of Immunology, School of Basic Medicine Qingdao University Qingdao 266021 People's Republic of China
| | - Qiuhong Huang
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University, Qingdao Shandong 266021 People's Republic of China
| | - Xuling Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 People's Republic of China
| | - Pengfei Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 People's Republic of China
| | - Mingxin Dong
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University, Qingdao Shandong 266021 People's Republic of China
| | - Wenjun Li
- Department of Medicinal Chemistry, School of Pharmacy Qingdao University, Qingdao Shandong 266021 People's Republic of China
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4
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Arioli M, Manfredi A, Alongi J, Ferruti P, Ranucci E. Highlight on the Mechanism of Linear Polyamidoamine Degradation in Water. Polymers (Basel) 2020; 12:E1376. [PMID: 32575401 PMCID: PMC7361999 DOI: 10.3390/polym12061376] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/12/2020] [Accepted: 06/17/2020] [Indexed: 11/17/2022] Open
Abstract
This paper aims at elucidating the degradation mechanism of linear polyamidoamines (PAAs) in water. PAAs are synthesized by the aza-Michael polyaddition of prim-monoamines or bis-sec-amines with bisacrylamides. Many PAAs are water-soluble and have potential for biotechnological applications and as flame-retardants. PAAs have long been known to degrade in water at pH ≥ 7, but their degradation mechanism has never been explored in detail. Filling this gap was necessary to assess the suitability of PAAs for the above applications. To this aim, a small library of nine PAAs was expressly synthesized and their degradation mechanism in aqueous solution studied by 1H-NMR in different conditions of pH and temperature. The main degradation mechanism was in all cases the retro-aza-Michael reaction triggered by dilution but, in some cases, hints were detected of concurrent hydrolytic degradation. Most PAAs were stable at pH 4.0; all degraded at pH 7.0 and 9.0. Initially, the degradation rate was faster at pH 9.0 than at pH 7.0, but the percent degradation after 97 days was mostly lower. In most cases, at pH 7.0 the degradation followed first order kinetics. The degradation rates mainly depended on the basicity of the amine monomers. More basic amines acted as better leaving groups.
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Affiliation(s)
| | | | | | - Paolo Ferruti
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy; (M.A.); (A.M.); (J.A.)
| | - Elisabetta Ranucci
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy; (M.A.); (A.M.); (J.A.)
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5
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Ma JH, Li L, Sun YL, Xu Z, Bai XF, Yang KF, Cao J, Cui YM, Yin GW, Xu LW. Silicon-mediated enantioselective synthesis of structurally diverse α-amino acid derivatives. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9768-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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6
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Bartoccini F, Mari M, Retini M, Galarini R, Bartolucci S, Piersanti G. Single‐Step Synthesis of Dehydroalanine Derivatives via a Brønsted Acid‐Catalyzed Multicomponent Reaction. ChemistrySelect 2020. [DOI: 10.1002/slct.202000898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Francesca Bartoccini
- Department of Biomolecular SciencesUniversity of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino, PU Italy
| | - Michele Mari
- Department of Biomolecular SciencesUniversity of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino, PU Italy
| | - Michele Retini
- Department of Biomolecular SciencesUniversity of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino, PU Italy
| | - Roberta Galarini
- Centro Sviluppo e Validazione MetodiIstituto Zooprofilattico Sperimentale dell'Umbria e delle Marche “Togo Rosati” Via G. Salvemini 1 06126 Perugia, PG Italy
| | - Silvia Bartolucci
- Department of Biomolecular SciencesUniversity of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino, PU Italy
| | - Giovanni Piersanti
- Department of Biomolecular SciencesUniversity of Urbino Carlo Bo Piazza Rinascimento 6 61029 Urbino, PU Italy
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7
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Sonnenschein MF, Patankar K, Virgili J, Collins T, Wendt B. Design, synthesis, and properties of novel amino-ester and amino-ester-alcohol polymer backbones. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Debnath S, Ujjwal RR, Ojha U. Self-Healable and Recyclable Dynamic Covalent Networks Based on Room Temperature Exchangeable Hydrazide Michael Adduct Linkages. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01827] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Suman Debnath
- Department of Chemistry, Rajiv Gandhi Institute of Petroleum Technology Jais, Bahadurpur, Mukhetia More, Harbanshganj, Amethi, Uttar Pradesh 229304, India
| | - Rewati Raman Ujjwal
- Department of Chemistry, Rajiv Gandhi Institute of Petroleum Technology Jais, Bahadurpur, Mukhetia More, Harbanshganj, Amethi, Uttar Pradesh 229304, India
| | - Umaprasana Ojha
- Department of Chemistry, Rajiv Gandhi Institute of Petroleum Technology Jais, Bahadurpur, Mukhetia More, Harbanshganj, Amethi, Uttar Pradesh 229304, India
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9
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Selvi T, Velmathi S. Indium(III) Triflate-Catalyzed Reactions of Aza-Michael Adducts of Chalcones with Aromatic Amines: Retro-Michael Addition versus Quinoline Formation. J Org Chem 2018; 83:4087-4091. [PMID: 29498283 DOI: 10.1021/acs.joc.7b03151] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The indium(III) triflate-catalyzed reaction of aza-Michael adducts of chalcones with aromatic amines has been investigated. The Michael adducts derived from substituted anilines and chalcones underwent retro-Michael addition to give the original starting materials, whereas the adducts derived from 1-naphthylamines and chalcones afforded quinolines. A six-membered cyclic transition state has been proposed to explain the retro-Michael addition, while a Povarov mechanism has been put forward to explain the quinoline formation.
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Affiliation(s)
- Thangavel Selvi
- Department of Chemistry , National Institute of Technology , Tiruchirappalli - 620 015 , Tamil Nadu , India
| | - Sivan Velmathi
- Department of Chemistry , National Institute of Technology , Tiruchirappalli - 620 015 , Tamil Nadu , India
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10
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Sallio R, Lebrun S, Capet F, Agbossou-Niedercorn F, Michon C, Deniau E. Diastereoselective auxiliary- and catalyst-controlled intramolecular aza-Michael reaction for the elaboration of enantioenriched 3-substituted isoindolinones. Application to the synthesis of a new pazinaclone analogue. Beilstein J Org Chem 2018; 14:593-602. [PMID: 29623121 PMCID: PMC5852534 DOI: 10.3762/bjoc.14.46] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 02/21/2018] [Indexed: 02/03/2023] Open
Abstract
A new asymmetric organocatalyzed intramolecular aza-Michael reaction by means of both a chiral auxiliary and a catalyst for stereocontrol is reported for the synthesis of optically active isoindolinones. A selected cinchoninium salt was used as phase-transfer catalyst in combination with a chiral nucleophile, a Michael acceptor and a base to provide 3-substituted isoindolinones in good yields and diastereomeric excesses. This methodology was applied to the asymmetric synthesis of a new pazinaclone analogue which is of interest in the field of benzodiazepine-receptor agonists.
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Affiliation(s)
- Romain Sallio
- Univ, Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Stéphane Lebrun
- Univ, Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Frédéric Capet
- Univ, Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Francine Agbossou-Niedercorn
- Univ, Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Christophe Michon
- Univ, Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Eric Deniau
- Univ, Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
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11
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Canard G, Chen Z, Suryaningtias A, Jean M, Vanthuyne N, Giorgi M, Roussel C, Siri O. Regioselective addition of DDQ on a quinoid ring: an entry into chiral zwitterionic bridging ligands. NEW J CHEM 2018. [DOI: 10.1039/c7nj03765a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Michael-type addition of DDQ on a zwitterionic ligand is described together with the chiral separation and full characterization of the two enantiomers of one derivative. These adducts offer a novel entry into chiral zwitterionic quinoidal ligands.
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Affiliation(s)
- Gabriel Canard
- Aix Marseille Univ
- CNRS
- CINaM (UMR 7325)
- Campus de Luminy
- 13288 Marseille cedex 09
| | - Zhongrui Chen
- Aix Marseille Univ
- CNRS
- CINaM (UMR 7325)
- Campus de Luminy
- 13288 Marseille cedex 09
| | | | - Marion Jean
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- ISM2 Marseille
- France
| | | | | | | | - Olivier Siri
- Aix Marseille Univ
- CNRS
- CINaM (UMR 7325)
- Campus de Luminy
- 13288 Marseille cedex 09
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12
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The aza-Michael reaction as an alternative strategy to generate advanced silicon-based (macro)molecules and materials. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2017.02.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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13
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Tawde TS, Wagh SJ, Sapre JV, Khose VN, Badani PM, Karnik AV. Reversal of enantioselectivity induced by the achiral part of an organocatalyst in a Diels–Alder reaction. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Feng L, Zhou L, Feng S. Preparation and characterization of silicone rubber cured via catalyst-free aza-Michael reaction. RSC Adv 2016. [DOI: 10.1039/c6ra23016d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A novel silicone rubber of high strength and stable dimension was cured via catalyst-free aza-Michael reaction.
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Affiliation(s)
- Linglong Feng
- Key Laboratory of Special Functional Aggregated Materials
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Lin Zhou
- Key Laboratory of Special Functional Aggregated Materials
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Shengyu Feng
- Key Laboratory of Special Functional Aggregated Materials
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
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15
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Lebrun S, Sallio R, Dubois M, Agbossou-Niedercorn F, Deniau E, Michon C. Chiral Phase-Transfer-Catalyzed Intramolecular aza-Michael Reactions for the Asymmetric Synthesis of Isoindolinones. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403573] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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16
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Amara Z, Drège E, Troufflard C, Retailleau P, Tran Huu-Dau ME, Joseph D. Switchable stereocontrolled divergent synthesis induced by aza-Michael addition of deactivated primary amines under acid catalysis. Chemistry 2014; 20:15840-8. [PMID: 25308396 DOI: 10.1002/chem.201404589] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 12/31/2022]
Abstract
Switchable tandem intramolecular aza-Michael/Michael and double aza-Michael reactions allow the oriented synthesis of highly functionalised cyclic skeletons. Conjugate addition of deactivated anilines triggers chemo- and stereo-divergent ring-closure reaction pathways with a striking selectivity depending on reaction conditions.
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Affiliation(s)
- Z Amara
- Université Paris-Sud, UMR 8076 BioCIS, LabEx LERMIT, Equipe de Chimie des Substances naturelles 5, rue Jean-Baptiste Clément, 92296 Châtenay-Malabry (France)
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17
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Yang W, Cui YM, Zou JF, Wang CY, Huang WS, Zhang J, Xu LW. Investigation of the Mitsunobu Reaction of BINOL and Cinchona Alkaloids: Inversion or Retention of Configuration? SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.930494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Wei Yang
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
| | - Yu-Ming Cui
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
| | - Jing-Feng Zou
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
| | - Cai-Yun Wang
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
| | - Wei-Sheng Huang
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
| | - Jin Zhang
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
| | - Li-Wen Xu
- a Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education , College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , Hangzhou , China
- b State Key Laboratory for Oxo Synthesis and Selective Oxidation , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou , China
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18
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Monsalve LN, Petroselli G, Erra-Ballsells R, Vázquez A, Baldessari A. Chemoenzymatic synthesis of novel N
-(2-hydroxyethyl)-β-peptoid oligomer derivatives and application to porous polycaprolactone films. POLYM INT 2013. [DOI: 10.1002/pi.4660] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Leandro N. Monsalve
- Laboratorio de Polímeros y Materiales Compuestos; Instituto de Tecnología en Polímeros y Nanotecnología (ITPN), Facultad de Ingeniería, UBA − CONICET; Las Heras 2214 (C1127AAR) Buenos Aires Argentina
- INTI - Centro de Micro y Nanoelectrónica del Bicentenario; Parque tecnológico Miguelete; Av. General Paz 5445 (B1650WAB) San Martín Buenos Aires Argentina
| | - Gabriela Petroselli
- Departamento de Química Orgánica y CIHIDECAR, Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires, Ciudad Universitaria; Pabellón 2, Piso 3 (C1428EGA) Buenos Aires Argentina
| | - Rosa Erra-Ballsells
- Departamento de Química Orgánica y CIHIDECAR, Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires, Ciudad Universitaria; Pabellón 2, Piso 3 (C1428EGA) Buenos Aires Argentina
| | - Analía Vázquez
- Laboratorio de Polímeros y Materiales Compuestos; Instituto de Tecnología en Polímeros y Nanotecnología (ITPN), Facultad de Ingeniería, UBA − CONICET; Las Heras 2214 (C1127AAR) Buenos Aires Argentina
| | - Alicia Baldessari
- Laboratorio de Biocatálisis, Departamento de Química Orgánica y UMYMFOR, Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires, Ciudad Universitaria; Pabellón 2, Piso 3 (C1428EGA) Buenos Aires Argentina
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19
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Iida H, Tang Z, Yashima E. Synthesis and bifunctional asymmetric organocatalysis of helical poly(phenylacetylene)s bearing cinchona alkaloid pendants via a sulfonamide linkage. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26678] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hiroki Iida
- Department of Molecular Design and Engineering; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
| | - Zhenglin Tang
- Department of Molecular Design and Engineering; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
| | - Eiji Yashima
- Department of Molecular Design and Engineering; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
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21
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Wu YQ, Zhang NW, Li F, Jiang KZ. Deviant mass shift of hydrated product ions from sodiated beta-anilinodidrochalcones using an ion-trap mass spectrometer. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2013; 19:351-359. [PMID: 24800419 DOI: 10.1255/ejms.1244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The fragmentation reactions of sodiated beta-anilinodidrochalcones have been investigated by electrospray ionization multi-stage mass spectrometry (ESI-MS(n)). The fragment ion of sodiated N-benzylidenebenzenamine (P1) easily undergoes ion-molecule reactions with the residual ESI solvent molecules (H2O and CH3OH) in the vacuum system, as verified by MS3 and accurate MS analysis. The formed hydrated ions appear as an unusual leading peak in the profile spectrum, which results in a deviant decreasing mass shift of almost 1 Da. Density functional theory calculations indicate that P1 easily associates with H2O without any energy barrier. Thus, the hydrated P1 exists partially as a loose system of P1 and H2O, which provides a reasonable explanation for the decreasing mass shift of the solvated P1. The above results are important in obtaining structural information from MS(n) spectra and preventing erroneous data interpretation for the analogous adducts.
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22
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Medina F, Michon C, Agbossou-Niedercorn F. Intermolecular Mono- and Dihydroamination of Activated Alkenes Using a Recoverable Gold Catalyst. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200891] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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23
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Wang J, Li P, Choy PY, Chan ASC, Kwong FY. Advances and Applications in Organocatalytic Asymmetric aza-Michael Addition. ChemCatChem 2012. [DOI: 10.1002/cctc.201200135] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Yang HM, Li L, Li F, Jiang KZ, Shang JY, Lai GQ, Xu LW. Silicon-Based Lewis Acid Assisted Cinchona Alkaloid Catalysis: Highly Enantioselective Aza-Michael Reaction under Solvent-Free Conditions. Org Lett 2011; 13:6508-11. [DOI: 10.1021/ol202803b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hua-Meng Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Li Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Fei Li
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Ke-Zhi Jiang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Jun-Yan Shang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Guo-Qiao Lai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou 310012, P. R. China
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