1
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Li L, Wasik KA, Frost BJ, Geary LM. Silver catalyzed proto- and sila-Nakamura-type α-vinylation of silyl enol ethers with dichloroacetylene. Divergent formation of stereochemically pure tri- and tetrasubstituted olefins. Tetrahedron Lett 2020; 61. [PMID: 32863449 DOI: 10.1016/j.tetlet.2019.151370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The silver-catalyzed reaction of silyl enol ethers with dichloroacetylene (DCA) is described. When DCA was used as a solution in diethyl ether, we found that the silyl group was transferred to the vinyl group, resulting in stereochemically pure tetrasubstituted olefins. However, when DCA was used as a solution in the more polar acetonitrile, protonation was the major pathway, and trisubstituted olefins were the dominant products.
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Affiliation(s)
- Lun Li
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
| | - Kimberly A Wasik
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
| | - Brian J Frost
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
| | - Laina M Geary
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
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2
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Koizumi T, Hayashi S. Synthesis of Polymers Having Exomethylene Groups via Palladium(0)-Catalyzed Cross-Coupling Polymerization of Propargylic Carbonates with Various Nucleophiles. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.351] [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]
Affiliation(s)
- Toshio Koizumi
- Department of Applied Chemistry, National Defense Academy
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3
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Scaggs WR, Snaddon TN. Enantioselective α-Allylation of Acyclic Esters Using B(pin)-Substituted Electrophiles: Independent Regulation of Stereocontrol Elements through Cooperative Pd/Lewis Base Catalysis. Chemistry 2018; 24:14378-14381. [PMID: 30011357 DOI: 10.1002/chem.201803543] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Indexed: 02/05/2023]
Abstract
Cooperation between a Lewis base and Pd catalyst enables the direct enantioselective α-functionalization of aryl and vinyl acetic acid esters using a bifunctional B(pin)-substituted electrophile. Critical to the success of this method was the recognition that both catalysts could control the necessary stereochemical aspects; the Lewis base catalyst controls the enantioselectivity of the reaction, whereas the Pd catalyst regulates alkenyl-B(pin) configuration. This is the first example of using cooperative catalysis to control both stereochemical features during Pd-catalyzed allylic alkylation.
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Affiliation(s)
- W Rush Scaggs
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Thomas N Snaddon
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
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4
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Stereoselective dibromination of diphenylphosphorylallenes with N-bromosuccinimide under mild conditions. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2017.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Schwarz KJ, Pearson CM, Cintron-Rosado GA, Liu P, Snaddon TN. Traversing Steric Limitations by Cooperative Lewis Base/Palladium Catalysis: An Enantioselective Synthesis of α-Branched Esters Using 2-Substituted Allyl Electrophiles. Angew Chem Int Ed Engl 2018; 57:7800-7803. [PMID: 29701289 DOI: 10.1002/anie.201803277] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Indexed: 11/10/2022]
Abstract
Cooperative catalysis enables the direct enantioselective α-allylation of linear prochiral esters with 2-substituted allyl electrophiles. Critical to the successful development of the method was the recognition that metal-centered reactivity and the source of enantiocontrol are independent. This feature is unique to simultaneous catalysis events and permits logical tuning of the supporting ligands without compromising enantioselectivity.
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Affiliation(s)
- Kevin J Schwarz
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
| | - Colin M Pearson
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
| | | | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Thomas N Snaddon
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, IN, 47405, USA
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6
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Schwarz KJ, Pearson CM, Cintron‐Rosado GA, Liu P, Snaddon TN. Traversing Steric Limitations by Cooperative Lewis Base/Palladium Catalysis: An Enantioselective Synthesis of α‐Branched Esters Using 2‐Substituted Allyl Electrophiles. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803277] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kevin J. Schwarz
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | - Colin M. Pearson
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
| | | | - Peng Liu
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 USA
| | - Thomas N. Snaddon
- Department of Chemistry Indiana University 800 East Kirkwood Avenue Bloomington IN 47405 USA
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7
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Duan S, Cheng B, Duan X, Bao B, Li Y, Zhai H. Synthesis of cis-5,5a,6,10b-Tetrahydroindeno[2,1-b]indoles through Palladium-Catalyzed Decarboxylative Coupling of Vinyl Benzoxazinanones with Arynes. Org Lett 2018; 20:1417-1420. [PMID: 29461841 DOI: 10.1021/acs.orglett.8b00192] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A novel palladium-catalyzed decarboxylative coupling reaction of vinyl benzoxazinanones with arynes which may feature an intramolecular nucleophilic attack of an amino group at the central carbon of π-allylpalladium intermediate has been developed. The cis-5,5a,6,10b-tetrahydroindeno[2,1-b]indoles were generated in moderate to good yields. One key to the success of the present reaction was to achieve comparable rates for the palladium-catalyzed decarboxylation and aryne formation steps.
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Affiliation(s)
- Shengguo Duan
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Bin Cheng
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Xiaoguang Duan
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Bian Bao
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Yun Li
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Hongbin Zhai
- The State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China.,Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University , Shenzhen 518055, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, China
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8
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Kutsumura N, Shibuya K, Yamaguchi H, Saito T. n-Butyllithium-promoted regioselective elimination of vicinal bis-triflate having an adjacent ether oxygen. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.09.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Debnath T, Ash T, Sarkar S, Das AK. Identification and characterization of intramolecular γ-halo interaction in d 0 complexes: a theoretical approach. J Mol Model 2017. [PMID: 28647872 DOI: 10.1007/s00894-017-3387-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A mechanistic investigation to detect intramolecular M⋯X-C type interactions in d0 neutral and cationic complexes was carried out through a benchmark study employing different density functional methods. As γ-halogen is involved in M⋯X-C type interactions, it is denoted as a γ-halo interaction and the respective conformers are designated as halo-conformers. By analyzing the geometrical parameters of halo-conformers, it was observed that, irrespective of the nature of the metal and the halogen, the Cγ-X bond distance increases compared to the usual C-X bond, which brings the M and X centers close enough to generate a weak interaction. Generation of the M⋯X-C interaction was confirmed by performing NBO, AIM and Wiberg bond index analyses, from which the persistence of γ-halo interaction was seen to be prominent. Moreover, for each neutral and cationic complex, the values of Wiberg bond order are in good agreement with the AIM results. The effect of the metal center, as well as γ-halogen substitution, on γ-halo interaction was also studied in the present work. To justify the practical subsistence of the halo-conformers, we checked the stability of the conformers with respect to their β-conformers by comparing the zero-point-corrected electronic energies. Therefore, the entire study was designed in such a way that it can provide evidence in support of intramolecular M⋯X-C interactions, where, instead of the C-H bond, the Cγ-X bond will interact with the central transition metal.
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Affiliation(s)
- Tanay Debnath
- Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Tamalika Ash
- Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Subhendu Sarkar
- Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Abhijit K Das
- Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
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10
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Selvaraju M, Sun CM. Unprecedented one-pot chemocontrolled entry to thioxoimidazolidinones and aminoimidazolones: synthesis of kinase inhibitor leucettamine B. ACS COMBINATORIAL SCIENCE 2015; 17:182-9. [PMID: 25569559 DOI: 10.1021/co500152s] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A novel and highly chemoselective protocol for the construction of thioxoimidazolidinone and aminoimidazolone frameworks was explored, and the influence of the reaction conditions on product formation was studied to establish two distinct approaches for their selective formation. In this one-pot reaction, ambient temperature generally resulted in the formation of thioxoimidazolidinones, whereas microwave irradiation provided aminoimidazolones exclusively. An attempt to elucidate the observed chemoselectivity is described, and the products were confirmed by X-ray studies. One-pot synthesis toward Leucettamine B, a marine alkaloid, was achieved on the basis of this protocol.
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Affiliation(s)
- Manikandan Selvaraju
- Department
of Applied Chemistry, National Chiao-Tung University, 1001 Ta-Hseuh
Road, Hsinchu 300-10, Taiwan
| | - Chung-Ming Sun
- Department
of Applied Chemistry, National Chiao-Tung University, 1001 Ta-Hseuh
Road, Hsinchu 300-10, Taiwan
- Department
of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100,
Shih-Chuan 1st Road, Kaohsiung 807-08, Taiwan
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11
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Sarkar S, Khan AT. Beyond conventional routes, an unprecedented metal-free chemoselective synthesis of anthranilate esters via a multicomponent reaction (MCR) strategy. Chem Commun (Camb) 2015; 51:12673-6. [DOI: 10.1039/c5cc03369a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A hitherto unreported route for the synthesis of anthranilate esters is demonstrated using 2-nitrobenzaldehyde, malonitrile and an alcohol or amine via a metal and oxidant free multicomponent reaction (MCR) strategy.
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Affiliation(s)
- Satavisha Sarkar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
| | - Abu T. Khan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039
- India
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12
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Kim BS, Hussain MM, Hussain N, Walsh PJ. Palladium-catalyzed chemoselective allylic substitution, Suzuki-Miyaura cross-coupling, and allene formation of bifunctional 2-B(pin)-substituted allylic acetate derivatives. Chemistry 2014; 20:11726-39. [PMID: 25077980 PMCID: PMC4219321 DOI: 10.1002/chem.201402353] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Indexed: 11/11/2022]
Abstract
A formidable challenge at the forefront of organic synthesis is the control of chemoselectivity to enable the selective formation of diverse structural motifs from a readily available substrate class. Presented herein is a detailed study of chemoselectivity with palladium-based phosphane catalysts and readily available 2-B(pin)-substituted allylic acetates, benzoates, and carbonates. Depending on the choice of reagents, catalysts, and reaction conditions, 2-B(pin)-substituted allylic acetates and derivatives can be steered into one of three reaction manifolds: allylic substitution, Suzuki-Miyaura cross-coupling, or elimination to form allenes, all with excellent chemoselectivity. Studies on the chemoselectivity of Pd catalysts in their reactivity with boron-bearing allylic acetate derivatives led to the development of diverse and practical reactions with potential utility in synthetic organic chemistry.
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Affiliation(s)
- Byeong-Seon Kim
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA, Fax: +12155736743, Tel: +12155732875
| | - Mahmud M. Hussain
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA, Fax: +12155736743, Tel: +12155732875
| | - Nusrah Hussain
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA, Fax: +12155736743, Tel: +12155732875
| | - Patrick J. Walsh
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 S. 34 Street, Philadelphia, PA 19104-6323, USA, Fax: +12155736743, Tel: +12155732875
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13
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Sarkar S, Das DK, Khan AT. Synthesis of fully-substituted pyridines and dihydropyridines in a highly chemoselective manner utilizing a multicomponent reaction (MCR) strategy. RSC Adv 2014. [DOI: 10.1039/c4ra08237k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient protocol has been developed for the synthesis of pyridines and 1,4-dihydropyridines based on chemoselective multicomponent reactions.
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Affiliation(s)
- Satavisha Sarkar
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
| | - Deb K. Das
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
| | - Abu T. Khan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
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14
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Li YX, Xuan QQ, Liu L, Wang D, Chen YJ, Li CJ. A Pd(0)-Catalyzed Direct Dehydrative Coupling of Terminal Alkynes with Allylic Alcohols To Access 1,4-Enynes. J Am Chem Soc 2013; 135:12536-9. [DOI: 10.1021/ja406025p] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yang-Xiong Li
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Qing-Qing Xuan
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Liu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Wang
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yong-Jun Chen
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition
and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chao-Jun Li
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal,
Quebec, Canada H3A 0B8
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15
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Kutsumura N, Matsubara Y, Niwa K, Ito A, Saito T. One-Pot Method for Regioselective Bromination and Sequential Carbon-Carbon Bond-Forming Reactions of Allylic Alcohol Derivatives. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300173] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Microwave-assisted chemoselective reaction: a divergent synthesis of pyrazolopyridine derivatives with different substituted patterns. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.081] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Wang SL, Ding J, Jiang B, Gao Y, Tu SJ. Microwave-assisted solvent-dependent reaction: chemoselective synthesis of quinoxalin-2(1H)-ones, benzo[d]imidazoles and dipeptides. ACS COMBINATORIAL SCIENCE 2011; 13:572-7. [PMID: 21815688 DOI: 10.1021/co2001247] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A microwave-assisted solvent-dependent chemoselective reaction dealing with 4-arylidene-2-phenyloxazol-5-ones and diverse ortho-diamines to achieve three types of molecular scaffolds, 3-benzylquinoxalin-2(1H)-ones, benzimidazole and β-amino dipeptides is reported. The procedures feature short reaction time, good to excellent yields, operational simplicity, as well as easily available starting materials. These compounds are of importance for organic chemistry and medicinal chemistry research.
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Affiliation(s)
- Shu-Liang Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou, 221116, P. R. China
| | - Jie Ding
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou, 221116, P. R. China
| | - Bo Jiang
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou, 221116, P. R. China
| | - Yuan Gao
- School of Chemistry and Chemical Engineering, Shenzhen University, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Synthetic Chemistry for Functional Materials, Xuzhou Normal University, Xuzhou, 221116, P. R. China
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18
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Rogers LR, Konstantinou Z, Reddy M, Organ MG. The Synthesis of Stereodefined Trisubstituted Olefins From Olefin Templates Using Pd Catalysis - Synthesis of the Antihypertensive Isbogrel. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Nishioka N, Koizumi T. Selective synthesis of functionalized allylic compounds by Pd(0)-catalyzed three-component reaction of methyl propargyl carbonate with phenols and nucleophiles. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.05.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Shi F, Ding J, Zhang S, Hao WJ, Cheng C, Tu S. Substrate-controlled chemoselective synthesis and potent cytotoxic activity of novel 5,6,7-triarylpyrido[2,3-d]pyrimidin-4-one derivatives. Bioorg Med Chem Lett 2011; 21:1554-8. [DOI: 10.1016/j.bmcl.2010.09.114] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 09/21/2010] [Accepted: 09/24/2010] [Indexed: 11/17/2022]
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21
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Geary LM, Hultin PG. Palladium-Catalyzed Modular Assembly of Electron-Rich Alkenes, Dienes, Trienes, and Enynes from (E)-1,2-Dichlorovinyl Phenyl Ether. J Org Chem 2010; 75:6354-71. [DOI: 10.1021/jo1014678] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laina M. Geary
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Philip G. Hultin
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
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22
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Hussain MM, Walsh PJ. Allylic substitution versus Suzuki cross-coupling: capitalizing on chemoselectivity with bifunctional substrates. Angew Chem Int Ed Engl 2010; 49:1834-7. [PMID: 20135655 PMCID: PMC2917587 DOI: 10.1002/anie.200905399] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
One catalyst, two reactions; a tale of chemoselectivity: Given the choice between an allylic acetate and a vinylboronate ester, palladium preferentially reacts with the allylic acetate giving the allylic substitution product. In the presence of an aryl bromide and base, Suzuki cross-coupling subsequently ensues to afford allylic amines.
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Affiliation(s)
- Mahmud M. Hussain
- Department of Chemistry, University of Pennsylvania, 231 S. 34 St, Philadelphia, Pennsylvania, 19104, USA
| | - Patrick J. Walsh
- Department of Chemistry, University of Pennsylvania, 231 S. 34 St, Philadelphia, Pennsylvania, 19104, USA
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23
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Hussain M, Walsh P. Allylic Substitution versus Suzuki Cross-Coupling: Capitalizing on Chemoselectivity with Bifunctional Substrates. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200905399] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Hao WJ, Jiang B, Tu SJ, Wu SS, Han ZG, Cao XD, Zhang XH, Yan S, Shi F. Microwave-Assisted Combinatorial Synthesis of New 3-Pyrimidin-5-ylpropanamides via a Solvent-Dependent Chemoselective Reaction. ACTA ACUST UNITED AC 2009; 11:310-4. [DOI: 10.1021/cc800175n] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wen-Juan Hao
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Bo Jiang
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Shu-Jiang Tu
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Shan-Shan Wu
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Zheng-Guo Han
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Xu-Dong Cao
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Xiao-Hong Zhang
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Shu Yan
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
| | - Feng Shi
- School of Chemistry and Chemical Engineering, Xuzhou Normal University, Key Laboratory of Biotechnology for Medicinal Plant, Xuzhou, Jiangsu, 221116, P. R. China, and College of Chemistry, Chemical Engineering, and Materials Science; Suzhou University, Suzhou, P.R. China
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Yamada YMA. Self-assembled complexes of non-cross-linked amphiphilic polymeric ligands with inorganic species: highly active and reusable solid-phase polymeric catalysts. Chem Pharm Bull (Tokyo) 2005; 53:723-39. [PMID: 15997125 DOI: 10.1248/cpb.53.723] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
I present herein the development of highly active and reusable polymeric catalysts produced by self-assembly process of non-cross-linked amphiphilic polymeric ligands with inorganic species. Thus, PWAA 1 prepared from H3PW12O40 and poly[(N-isopropylacrylamide)-co-(acrylamide with ammonium salt)] is suitable for oxidation of alcohols, amines, and sulfides in aqueous hydrogen peroxide. PdAS 2 produced by self-organization of (NH4)2PdCl4 and poly[(N-isopropylacrylamide)10-co-diphenylphosphinostyrene] is an excellent recyclable catalyst for Suzuki-Miyaura reaction in water, water-organic solvent, and organic solvent. It is commercially available from Tokyo Kasei Kogyo (TCI). PdAS-V 3 assembled from (NH4)2PdCl4 and poly[(N-isopropylacrylamide)5-co-diphenylphosphinostyrene] provides recycling system of itself for Mizorogi-Heck reaction. TiSS 4 made from Ti(O-i-Pr)4 and poly(styryl-linked binaphtholate-co-styrene) promotes an enantioselective carbonyl-ene reaction as a recyclable catalyst.
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26
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Abstract
Highly active and reusable polymeric catalysts were produced by a self-assembly process of non-cross-linked amphiphilic polymeric ligands with inorganic species. Thus a new insoluble tungsten polymeric catalyst PWAA 1 was prepared from H(3)PW(12)O(40) and poly[(N-isopropylacrylamide)-co-(acrylamide with ammonium salt)], which was suitable for the oxidation of alcohols, amines, and sulfides in aqueous hydrogen peroxide. A new insoluble palladium polymeric catalyst PdAS 2 was produced by self-organization of (NH(4))(2)PdCl(4) and poly[(N-isopropylacrylamide)(10)-co-diphenylphosphinostyrene], which is an excellent recyclable catalyst for the Suzuki-Miyaura reaction in water, water-organic solvents, and organic solvents. It is commercially available from Tokyo Kasei Kogyo (TCI). An improved insoluble palladium polymeric catalyst PdAS-V 3 was assembled from (NH(4))(2)PdCl(4) and poly[(N-isopropylacrylamide)(5)-co-diphenylphosphinostyrene], providing a reusable system for the Mizorogi-Heck reaction. A solid-phase titanium asymmetric polymeric catalyst TiSS 4 was made from Ti (O-i-Pr)(4) and poly(styryl-linked binaphtholate-co-styrene) which promotes an enantioselective carbonyl-ene reaction as a recyclable catalyst.
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27
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Comer E, Organ MG, Hynes SJ. Allylic ionization versus oxidative addition into vinyl C-X bonds by Pd with polyfunctional olefin templates. J Am Chem Soc 2005; 126:16087-92. [PMID: 15584744 DOI: 10.1021/ja045416h] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The chemoselectivity of activation by a (PPh3)4Pd catalyst on a series of small, olefin-based compounds that were substituted with a variety of allylic and vinylic functional groups was studied. Of particular note, the allylic acetate of 1-acetoxy-2-bromo-2-propene (7) was selectively ionized by Pd in the presence of a malonate nucleophile, while oxidative addition of the C-Br bond to Pd occurred exclusively in the presence of a boronic acid nucleophile. When the acetate nucleophile was used, no ionization of the acetate leaving group occurred at all, which was proven by the use of deuterium-labeled substrates (e.g., 11). This report demonstrates that the nucleophile interacts in some way with Pd prior to catalyst activation of the substrate. Certainly in the case of the malonate nucleophile, this is without precedent and contradicts the central dogma of how these proposed catalytic cycles operate.
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Affiliation(s)
- Eamon Comer
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3
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29
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Blazecka PG, Belmont D, Curran T, Pflum D, Zhang J. Further Utilization of Mucohalic Acids: Palladium-Free, Regioselective Etherification and Amination of α,β-Dihalo γ-Methoxycarbonyloxy and γ-Acetoxy Butenolides. Org Lett 2003; 5:5015-7. [PMID: 14682753 DOI: 10.1021/ol035994n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Palladium-free etherification and amination of mucohalic acid methyl carbonates 1e (3,4-dichloro-5-methoxycarbonyloxy-5H-furan-2-one) and 1f (3,4-dibromo-5-methoxycarbonyloxy-5H-furan-2-one) and mucochloric acid acetate 1h (3,4-dichloro-5-acetoxy-5H-furan-2-one) was achieved to afford gamma-functionalized alpha,beta-unsaturated gamma-butyrolactones in good to excellent yield. [reaction: see text]
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Affiliation(s)
- Peter G Blazecka
- Chemical Research and Development, Pfizer Global Research & Development, Ann Arbor Laboratories, Pfizer, Inc., 2800 Plymouth Road, Ann Arbor, MI 48105, USA
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Yamada YMA, Takeda K, Takahashi H, Ikegami S. Highly Active Catalyst for the Heterogeneous Suzuki−Miyaura Reaction: Assembled Complex of Palladium and Non-Cross-Linked Amphiphilic Polymer. J Org Chem 2003; 68:7733-41. [PMID: 14510549 DOI: 10.1021/jo034354v] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An assembled insoluble catalyst, PdAS, prepared from palladium ((NH4)2PdCl4 (1)) and non-cross-linked amphiphilic copolymer poly(N-isopropylacrylamide-co-4-diphenylstyrylphosphine) (2) was developed. It was found that PdAS is an excellent catalyst for the Suzuki-Miyaura reaction on three points: (1) The use of 8 x 10(-7) to 5 x 10(-4) mol equiv of PdAS afforded the coupling products efficiently after easy workup, with the turnover number reaching up to 1,250,000. (2) The catalyst was reusable many times without loss of catalytic activity. (3) PdAS showed good stability in any reaction medium (i.e., water or aqueous or anhydrous organic solvents). Analytical study of PdAS indicates that the phosphines in 2 coordinate to palladium to form PdCl2(PPh2Ar)2 species.
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Affiliation(s)
- Yoichi M A Yamada
- Faculty of Pharmaceutical Sciences, Teikyo University, Sagamiko, Kanagawa 199-0195, Japan
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31
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Organ MG, Arvanitis EA, Villani A, Majkut Y, Hynes S. Differentiating allylic and vinylic leaving groups for Pd catalysis. The use of vinyl iodide to facilitate room temperature activation of a vinyl CX bond in the presence of allyl carbonate. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00881-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Organ MG, Arvanitis EA, Hynes SJ. On the regiochemistry of nucleophilic attack on 2-halo pi-allyl complexes. 4. The effect of silver acetate and nucleophile concentrations in competitive nucleophilic attack with malonate and phenoxide nucleophiles. J Org Chem 2003; 68:3918-22. [PMID: 12737572 DOI: 10.1021/jo034119c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
2,3-Dibromo-1-propene or its allyl carbonate analogue are ionized under Pd catalysis to generate the 2-bromo Pd-pi-allyl complex (triphenylphosphine ligand), which alkylates with malonate nucleophile at the terminal position. The presence of acetate ion in the reaction mixture results in some malonate attack being redirected to the central carbon. The acetate ion can come from the ionization of 1-acetoxy-2-bromo-2-propene or by the addition of silver acetate to the reaction mixture. The addition of phenoxide ion to the reaction also causes the same regiochemical phenomena, although harder anions such as methoxide exert no such effect.
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Affiliation(s)
- Michael G Organ
- The Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3.
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Organ MG, Bilokin YV, Bratovanov S. Approach toward the total synthesis of orevactaene. 2. Convergent and stereoselective synthesis of the C18-C31 domain of orevactaene. Evidence for the relative configuration of the side chain. J Org Chem 2002; 67:5176-83. [PMID: 12126403 DOI: 10.1021/jo0201777] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of the C18-C31 subunit of orevactaene (1) in an enantioselective and convergent manner is reported. Four chiral centers in the structure (i.e., carbons 23, 25, 32, and 33) have unknown configuration; thus, a modular approach has been devised to link the two stereocenter-containing ends of the structure together via a trisubstituted olefin template to ultimately produce all possible diastereomers of the target. Keys to the success of this approach include (i) an efficient synthesis of four diastereomeric hydrophobic tails (C22-C29) of the molecule with two stereogenic centers at C23 and C25; (ii) the synthesis of three stereodefined trisubstituted olefins 37, 38, and 43 using palladium(0)-catalyzed hydrometalation and metallometalation; and (iii) the convergent assembly of the aforementioned sections by a 'one-pot' lithium/halogen exchange, boron/lithium exchange, borate ester saponification, and Suzuki cross-coupling followed by oxidative deprotection. The sequence provided the desired aldehydes 49 and 50 as single isomers in good yields. Compiled spectroscopic data from the literature and present work provides evidence that the relative configuration of the methyl groups in the side chain of orevactaene may be 1,3-syn, which will be confirmed when the total synthesis has been completed. These results have paved the way for a parallel synthesis approach to prepare all 16 possible stereoisomers of orevactaene so that the relative and absolute stereochemistry of this compound can be determined.
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Affiliation(s)
- Michael G Organ
- Department of Chemistry, York University, 4700 Keele Street, Toronto, Ontario, Canada M3J 1P3.
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