101
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Andrews KG, Denton RM. A more critical role for silicon in the catalytic Staudinger amidation: silanes as non-innocent reductants. Chem Commun (Camb) 2017; 53:7982-7985. [DOI: 10.1039/c7cc03076b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We demonstrate that in situ-generated silyl ester intermediates are key mediators of the catalytic, traceless Staudinger amidation reaction.
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102
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Guo S, Dai Z, Hua J, Yang Z, Fang Z, Guo K. Microfluidic synthesis of α-ketoesters via oxidative coupling of acetophenones with alcohols under metal-free conditions. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00107j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An efficient and novel method for the synthesis of α-ketoesters has been developed via oxidative coupling of acetophenones with alcohols under TBHP/I2/DBU conditions in a microfluidic chip reactor, which has a wide substrate scope, uses a lower dosage of iodine and affords higher product yields in only a few seconds.
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Affiliation(s)
- Shiyu Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Zhongxue Dai
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Jiawei Hua
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Zhao Yang
- College of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
- State Key Laboratory of Materials-Oriented Chemical Engineering
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103
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Hamstra DFJ, Lenstra DC, Koenders TJ, Rutjes FPJT, Mecinović J. Poly(methylhydrosiloxane) as a green reducing agent in organophosphorus-catalysed amide bond formation. Org Biomol Chem 2017; 15:6426-6432. [DOI: 10.1039/c7ob01510k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ reduction of phosphine oxide by poly(methylhydrosiloxane) leads to efficient amidation reaction between carboxylic acids and amines.
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Affiliation(s)
- Daan F. J. Hamstra
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | - Danny C. Lenstra
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | - Tjeu J. Koenders
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
| | | | - Jasmin Mecinović
- Institute for Molecules and Materials
- Radboud University
- 6525 AJ Nijmegen
- The Netherlands
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104
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Zhou R, Liu R, Zhang K, Han L, Zhang H, Gao W, Li R. Metal-free formal carbon–halogen bond insertion: facile syntheses of 3-halo 3,3′-disubstituted oxindoles and spirooxindole-γ-butyrolactones. Chem Commun (Camb) 2017; 53:6860-6863. [DOI: 10.1039/c7cc03765a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A metal-free carbon–heteroatom bond insertion of isatins into allylic and benzylic bromides/chlorides is reported.
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Affiliation(s)
- Rong Zhou
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Rongfang Liu
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Kai Zhang
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Ling Han
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Honghui Zhang
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Wenchao Gao
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Ruifeng Li
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
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105
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Jiang J, Liu H, Lu CD, Xu YJ. P(NMe2)3-Mediated Aziridination of Imines with α-Ketoesters for Synthesis of Aziridine-2-carboxylates. J Org Chem 2016; 82:811-818. [DOI: 10.1021/acs.joc.6b02669] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jin Jiang
- Key Laboratory of Plant Resources and Chemistry of Arid Zones, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Liu
- Key Laboratory of Plant Resources and Chemistry of Arid Zones, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Chong-Dao Lu
- Key Laboratory of Plant Resources and Chemistry of Arid Zones, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Yan-Jun Xu
- Key Laboratory of Plant Resources and Chemistry of Arid Zones, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
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106
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Oh S, Kim S, Lee D, Gwak J, Lee Y. Alkoxide Migration at a Nickel(II) Center Induced by a π-Acidic Ligand: Migratory Insertion versus Metal–Ligand Cooperation. Inorg Chem 2016; 55:12863-12871. [DOI: 10.1021/acs.inorgchem.6b02226] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seohee Oh
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Seji Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Dayoung Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Jinseong Gwak
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yunho Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
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107
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Kumar Y, Jaiswal Y, Kumar A. Copper(II)-Catalyzed Benzylic C(sp3)–H Aerobic Oxidation of (Hetero)Aryl Acetimidates: Synthesis of Aryl-α-ketoesters. J Org Chem 2016; 81:12247-12257. [DOI: 10.1021/acs.joc.6b02176] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yogesh Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Yogesh Jaiswal
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
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108
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Voituriez A, Saleh N. From phosphine-promoted to phosphine-catalyzed reactions by in situ phosphine oxide reduction. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.036] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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109
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Lee CJ, Chang TH, Yu JK, Madhusudhan Reddy G, Hsiao MY, Lin W. Synthesis of Functionalized Furans via Chemoselective Reduction/Wittig Reaction Using Catalytic Triethylamine and Phosphine. Org Lett 2016; 18:3758-61. [DOI: 10.1021/acs.orglett.6b01781] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Chia-Jui Lee
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Tzu-Hsiu Chang
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Jhen-Kuei Yu
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Ganapuram Madhusudhan Reddy
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Ming-Yu Hsiao
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
| | - Wenwei Lin
- Department
of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan ROC
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110
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Byrne PA, Gilheany DG. The Mechanism of Phosphonium Ylide Alcoholysis and Hydrolysis: Concerted Addition of the O−H Bond Across the P=C Bond. Chemistry 2016; 22:9140-54. [DOI: 10.1002/chem.201600530] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Peter A. Byrne
- Centre for Synthesis and Chemical Biology; University College Dublin; Belfield Dublin 4 Ireland
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstr. 5-13 (Haus F) 81377 München Germany
| | - Declan G. Gilheany
- Centre for Synthesis and Chemical Biology; University College Dublin; Belfield Dublin 4 Ireland
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111
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Wang L, Xie YB, Huang NY, Yan JY, Hu WM, Liu MG, Ding MW. Catalytic aza-Wittig Reaction of Acid Anhydride for the Synthesis of 4H-Benzo[d][1,3]oxazin-4-ones and 4-Benzylidene-2-aryloxazol-5(4H)-ones. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00165] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Long Wang
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
- Hubei Key Laboratory
of Natural Products Research and Development, China Three Gorges University, Yichang, Hubei 443002, China
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan, Hubei 430079, China
| | - Yi-Bi Xie
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Nian-Yu Huang
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
- Hubei Key Laboratory
of Natural Products Research and Development, China Three Gorges University, Yichang, Hubei 443002, China
| | - Jia-Ying Yan
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Wei-Min Hu
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
| | - Ming-Guo Liu
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
- Hubei Key Laboratory
of Natural Products Research and Development, China Three Gorges University, Yichang, Hubei 443002, China
| | - Ming-Wu Ding
- College of Materials and Chemical Engineering, China Three Gorges University, Yichang, Hubei 443002, China
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Central China Normal University, Wuhan, Hubei 430079, China
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112
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Saleh N, Voituriez A. Synthesis of 9H-Pyrrolo[1,2-a]indole and 3H-Pyrrolizine Derivatives via a Phosphine-Catalyzed Umpolung Addition/Intramolecular Wittig Reaction. J Org Chem 2016; 81:4371-7. [DOI: 10.1021/acs.joc.6b00473] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nidal Saleh
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Arnaud Voituriez
- Institut de Chimie des Substances
Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 av. de la Terrasse, 91198 Gif-sur-Yvette, France
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113
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Hirai M, Cho J, Gabbaï FP. Promoting the Hydrosilylation of Benzaldehyde by Using a Dicationic Antimony‐Based Lewis Acid: Evidence for the Double Electrophilic Activation of the Carbonyl Substrate. Chemistry 2016; 22:6537-41. [DOI: 10.1002/chem.201600971] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Masato Hirai
- Department of Chemistry Texas A&M University College Station Texas 77843 USA), Fax
| | - Junsang Cho
- Department of Chemistry Texas A&M University College Station Texas 77843 USA), Fax
| | - François P. Gabbaï
- Department of Chemistry Texas A&M University College Station Texas 77843 USA), Fax
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114
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Zhou R, Zhang K, Han L, Chen Y, Li R, He Z. Unusual Formal [1+4] Annulation through Tandem P(NMe2
)3
-Mediated Cyclopropanation/Base-Catalyzed Cyclopropane Rearrangement: Facile Syntheses of Cyclopentenimines and Cyclopentenones. Chemistry 2016; 22:5883-7. [DOI: 10.1002/chem.201505047] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Rong Zhou
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 P. R. China
| | - Kai Zhang
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 P. R. China
| | - Ling Han
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 P. R. China
| | - Yusong Chen
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 P. R. China
| | - Ruifeng Li
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; Taiyuan 030024 P. R. China
| | - Zhengjie He
- The State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China
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115
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Ma J, Yuan ZZ, Kong XW, Wang H, Li YM, Xiao H, Zhao G. Reagent-Controlled Tandem Reactions of Vinyl Epoxides: Access to Functionalized γ-Butenolides. Org Lett 2016; 18:1450-3. [DOI: 10.1021/acs.orglett.6b00392] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Juan Ma
- Department
of Pharmaceutical Engineering, Hefei University of Technology, 193 Tunxi
Road, Hefei 230009, P. R. China
| | - Zhe-zhe Yuan
- Department
of Pharmaceutical Engineering, Hefei University of Technology, 193 Tunxi
Road, Hefei 230009, P. R. China
| | - Xiang-wen Kong
- Department
of Pharmaceutical Engineering, Hefei University of Technology, 193 Tunxi
Road, Hefei 230009, P. R. China
| | - Huai Wang
- Department
of Pharmaceutical Engineering, Hefei University of Technology, 193 Tunxi
Road, Hefei 230009, P. R. China
| | - Yi-ming Li
- Department
of Pharmaceutical Engineering, Hefei University of Technology, 193 Tunxi
Road, Hefei 230009, P. R. China
| | - Hua Xiao
- Department
of Pharmaceutical Engineering, Hefei University of Technology, 193 Tunxi
Road, Hefei 230009, P. R. China
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Lu, Shanghai 200032, P. R. China
| | - Gang Zhao
- Key
Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling
Lu, Shanghai 200032, P. R. China
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116
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Guo S, Dai Z, Yang Z, Zhu N, Wan L, Li X, Liu C, Fang Z, Guo K. Metal-free oxidative esterification of acetophenones with alcohols: a facile one-pot approach to α-ketoesters. RSC Adv 2016. [DOI: 10.1039/c6ra19485k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel oxidative esterification method for the synthesis of α-ketoesters has been developed, which is a facile one-pot approach to α-ketoesters from acetophenones with alcohols, especially under metal-free conditions with broad substrate scope.
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Affiliation(s)
- Shiyu Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Zhongxue Dai
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Zhao Yang
- College of Engineering
- China Pharmaceutical University
- Nanjing
- China
| | - Ning Zhu
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Li Wan
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Xin Li
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Chengkou Liu
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing
- China
- State Key Laboratory of Materials-Oriented Chemical Engineering
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117
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Schirmer ML, Jopp S, Holz J, Spannenberg A, Werner T. Organocatalyzed Reduction of Tertiary Phosphine Oxides. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500762] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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118
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Zhao Q, Zhao Y, Liao H, Cheng T, Liu G. Dual Pathway for the Asymmetric Transfer Hydrogenation of α-Ketoimides to Chiral α-Hydroxy Imides or Chiral α-Hydroxy Esters. ChemCatChem 2015. [DOI: 10.1002/cctc.201500906] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qiankun Zhao
- Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; No.100 Guilin Rd. P.R. China
| | - Yuxi Zhao
- Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; No.100 Guilin Rd. P.R. China
| | - Hang Liao
- Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; No.100 Guilin Rd. P.R. China
| | - Tanyu Cheng
- Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; No.100 Guilin Rd. P.R. China
| | - Guohua Liu
- Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; No.100 Guilin Rd. P.R. China
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119
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Gregson AM, Wales SM, Bailey SJ, Willis AC, Keller PA. Cyclic Phosphine Oxides and Phosphinamides from Di-Grignard Reagents and Phosphonic Dichlorides: Modular Access to Annulated Phospholanes. J Org Chem 2015; 80:9774-80. [PMID: 26355687 DOI: 10.1021/acs.joc.5b01476] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction between 1,4-di-Grignard reagents and phosphonous(III) dichlorides is a classical method for the direct synthesis of phospholanes. Reported here is an extension of this approach to the preparation of value-added, annulated phospholane oxides, achieved through the combination of carbocyclic-fused di-Grignard reagents and readily available phosphonic(V) dichlorides. The procedure is amenable to (benz)annulation at both the 2,3- and 3,4-positions of the phospholane ring, and a variety of aliphatic, cyclic and aryl P-electrophiles are tolerated in reasonable to excellent yields.
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Affiliation(s)
- Aaron M Gregson
- School of Chemistry, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Steven M Wales
- School of Chemistry, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Stephen J Bailey
- School of Chemistry, University of Wollongong , Wollongong, NSW 2522, Australia
| | - Anthony C Willis
- Research School of Chemistry, The Australian National University , Canberra, ACT 2601, Australia
| | - Paul A Keller
- School of Chemistry, University of Wollongong , Wollongong, NSW 2522, Australia
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120
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Buonomo JA, Aldrich CC. Mitsunobu Reactions Catalytic in Phosphine and a Fully Catalytic System. Angew Chem Int Ed Engl 2015; 54:13041-4. [PMID: 26347115 PMCID: PMC4648044 DOI: 10.1002/anie.201506263] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Indexed: 11/06/2022]
Abstract
The Mitsunobu reaction is renowned for its mild reaction conditions and broad substrate tolerance, but has limited utility in process chemistry and industrial applications due to poor atom economy and the generation of stoichiometric phosphine oxide and hydrazine by-products that complicate purification. A catalytic Mitsunobu reaction using innocuous reagents to recycle these by-products would overcome both of these shortcomings. Herein we report a protocol that is catalytic in phosphine (1-phenylphospholane) employing phenylsilane to recycle the catalyst. Integration of this phosphine catalytic cycle with Taniguchi's azocarboxylate catalytic system provided the first fully catalytic Mitsunobu reaction.
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Affiliation(s)
- Joseph A Buonomo
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard St. SE, Minneapolis, MN 55455 (USA)
| | - Courtney C Aldrich
- Department of Medicinal Chemistry, University of Minnesota, 308 Harvard St. SE, Minneapolis, MN 55455 (USA).
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121
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Tsai YL, Lin W. Synthesis of Multifunctional Alkenes from Substituted Acrylates and Aldehydes via Phosphine-Catalyzed Wittig Reaction. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500251] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yi-Ling Tsai
- Department of Chemistry; National Taiwan Normal University; No. 88, Sec. 4, Tingchow Road Taipei Taiwan 11677 Republic of China
| | - Wenwei Lin
- Department of Chemistry; National Taiwan Normal University; No. 88, Sec. 4, Tingchow Road Taipei Taiwan 11677 Republic of China
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122
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Stereochemical implications in the synthesis of 3,3′-spirocyclopropyl oxindoles from β-aryl/alkyl-substituted alkylidene oxindoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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123
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Buonomo JA, Aldrich CC. Mitsunobu Reactions Catalytic in Phosphine and a Fully Catalytic System. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506263] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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124
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Abstract
A commercial phosphorus-based reagent (P(NMe2)3) mediates umpolung alkylation of methyl aroylformates with benzylic and allylic bromides, leading to either Barbier-type addition or ylide-free olefination products upon workup. The reaction sequence is initiated by a two-electron redox addition of the tricoordinate phosphorus reagent with an α-keto ester compound (Kukhtin-Ramirez addition). A mechanistic rationale is offered for the chemoselectivity upon which the success of this nonmetal mediated C-C bond forming strategy is based.
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Affiliation(s)
- Sunewang Rixin Wang
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Alexander T. Radosevich
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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125
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Liu LL, Chan C, Zhu J, Cheng CH, Zhao Y. Stability, Reactivity, Selectivity, Catalysis, and Predictions of 1,3,2,5-Diazadiborinine: Computational Insight into a Boron–Boron Frustrated Lewis Pair. J Org Chem 2015; 80:8790-5. [DOI: 10.1021/acs.joc.5b01726] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Chinglin Chan
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | - Chien-Hong Cheng
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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126
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Demchuk OM, Jasiński R, Pietrusiewicz KM. New Insights into the Mechanism of Reduction of Tertiary Phosphine Oxides by Means of Phenylsilane. HETEROATOM CHEMISTRY 2015. [DOI: 10.1002/hc.21279] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Oleg M. Demchuk
- Department of Organic Chemistry; Maria Curie-Sklodowska University; Lublin 20614 Poland
| | - Radomir Jasiński
- Institute of Organic Chemistry and Technology; Cracow University of Technology; Cracow 31155 Poland
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127
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Reichl KD, Dunn NL, Fastuca NJ, Radosevich AT. Biphilic Organophosphorus Catalysis: Regioselective Reductive Transposition of Allylic Bromides via P(III)/P(V) Redox Cycling. J Am Chem Soc 2015; 137:5292-5. [PMID: 25874950 DOI: 10.1021/jacs.5b01899] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report that a regioselective reductive transposition of primary allylic bromides is catalyzed by a biphilic organophosphorus (phosphetane) catalyst. Spectroscopic evidence supports the formation of a pentacoordinate (σ(5)-P) hydridophosphorane as a key reactive intermediate. Kinetics experiments and computational modeling are consistent with a unimolecular decomposition of the σ(5)-P hydridophosphorane via a concerted cyclic transition structure that delivers the observed allylic transposition and completes a novel P(III)/P(V) redox catalytic cycle. These results broaden the growing repertoire of reactions catalyzed within the P(III)/P(V) redox couple and suggest additional opportunities for organophosphorus catalysis in a biphilic mode.
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Affiliation(s)
- Kyle D Reichl
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Nicole L Dunn
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Nicholas J Fastuca
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Alexander T Radosevich
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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128
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Huang X, Li X, Zou M, Pan J, Jiao N. TEMP and copper cocatalyzed oxygenation of ketones with molecular oxygen: chemoselective synthesis of α-ketoesters. Org Chem Front 2015. [DOI: 10.1039/c5qo00028a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A practical approach to α-ketoesters through TEMP and copper cocatalyzed chemoselective oxidative coupling of methyl ketones with alcohols is developed.
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Affiliation(s)
- Xiaoqiang Huang
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
| | - Xinwei Li
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
| | - Miancheng Zou
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
| | - Jun Pan
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
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129
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Zhang WZ, Xia T, Yang XT, Lu XB. Synthesis of oxazolidine-2,4-diones by a tandem phosphorus-mediated carboxylative condensation–cyclization reaction using atmospheric carbon dioxide. Chem Commun (Camb) 2015; 51:6175-8. [DOI: 10.1039/c5cc01530h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel access to oxazolidine-2,4-diones using atmospheric CO2 and readily available substrates under mild and transition-metal-free conditions is developed.
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Affiliation(s)
- Wen-Zhen Zhang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Tian Xia
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Xu-Tong Yang
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology
- Dalian
- P. R. China
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130
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Zhou R, Zhang K, Chen Y, Meng Q, Liu Y, Li R, He Z. P(NMe2)3-mediated reductive [1+4] annulation of isatins with enones: a facile synthesis of spirooxindole-dihydrofurans. Chem Commun (Camb) 2015; 51:14663-6. [DOI: 10.1039/c5cc03676c] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A novel reductive [1+4] annulation reaction of isatins and enones via Kukhtin–Ramirez adducts is reported.
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Affiliation(s)
- Rong Zhou
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Kai Zhang
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Yusong Chen
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Qiang Meng
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Yiyi Liu
- The State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
| | - Ruifeng Li
- College of Chemistry and Chemical Engineering
- Taiyuan University of Technology
- Taiyuan
- P. R. China
| | - Zhengjie He
- The State Key Laboratory of Elemento-Organic Chemistry
- Nankai University
- Tianjin
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering
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