1
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Yang Q, Zhou J, Wang J(J. Enantioselective copper-catalyzed hydrophosphination of alkenyl isoquinolines. Chem Sci 2023; 14:4413-4417. [PMID: 37123192 PMCID: PMC10132128 DOI: 10.1039/d2sc06950d] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/20/2023] [Indexed: 04/07/2023] Open
Abstract
An enantioselective Cu-catalyzed hydrophosphination of alkenyl quinolines was developed to access a variety of potential chiral bidentate P,N-ligands.
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Affiliation(s)
- Qingjing Yang
- Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Jian Zhou
- Department of Chemistry, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
| | - Jun (Joelle) Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
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2
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Zhu J, Ye Y, Huang Y. Palladacycle-Catalyzed Olefinic C–P Cross-Coupling of Alkenylsulfonium Salts with Diarylphosphines to Access Alkenylphosphines. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie Zhu
- College of Materials, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Yun Ye
- College of Materials, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
| | - Yinhua Huang
- College of Materials, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, People’s Republic of China
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3
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Maiti R, Yan J, Yang X, Mondal B, Xu J, Chai H, Jin Z, Chi YR. Carbene‐Catalyzed Enantioselective Hydrophosphination of α‐Bromoenals to Prepare Phosphine‐Containing Chiral Molecules. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rakesh Maiti
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jia‐Lei Yan
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Xing Yang
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Bivas Mondal
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Huifang Chai
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University Huaxi District Guiyang 550025 China
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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4
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Seah JWK, Teo RHX, Leung PH. Organometallic chemistry and application of palladacycles in asymmetric hydrophosphination reactions. Dalton Trans 2021; 50:16909-16915. [PMID: 34734619 DOI: 10.1039/d1dt03134a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A number of palladacycles containing chiral chelating auxiliaries have been utilized as efficient catalysts for asymmetric hydrophosphination reactions. In all cases, the chiral auxiliaries remained coordinated to the palladium centres throughout the course of the reactions. Despite the presence of a large quantity of powerful tertiary phosphines, which are known to be strong metal ion sequesters, the expected catalyst poisoning was rarely observed in these palladacycle catalyzed processes. This review highlights the unique stereoelectronic features and the important organometallic chemistry of palladacycle catalysts which are essential to their synthetic operations.
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Affiliation(s)
- Jeffery Wee Kiong Seah
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | - Ronald Hong Xiang Teo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
| | - Pak-Hing Leung
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
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5
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Maiti R, Yan JL, Yang X, Mondal B, Xu J, Chai H, Jin Z, Chi YR. Carbene-Catalyzed Enantioselective Hydrophosphination of α-Bromoenals to Prepare Phosphine-Containing Chiral Molecules. Angew Chem Int Ed Engl 2021; 60:26616-26621. [PMID: 34599547 DOI: 10.1002/anie.202112860] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Indexed: 11/07/2022]
Abstract
Disclosed herein is the first carbene-organocatalyzed asymmetric addition of phosphine nucleophiles to the in situ generated α,β-unsaturated acyl azolium intermediates. Our reaction enantioselectively constructs carbon-phosphine bonds and prepares chiral phosphines with high optical purities. The phosphine products are suitable for transforming to chiral ligands or catalysts with applications in asymmetric catalysis. The diarylalkyl or trialkyl phosphine products from our catalytic reactions, air-sensitive and reactive in nature, can be trapped (and stored) in their sulfur-oxidized form for operational simplicities.
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Affiliation(s)
- Rakesh Maiti
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jia-Lei Yan
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Xing Yang
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Bivas Mondal
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jun Xu
- Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Huifang Chai
- Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Yonggui Robin Chi
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China.,Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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6
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Nagaraju S, Sathish K, Kashinath D. Applications of 3,5‐Dialkyl‐4‐nitroisoxazoles and Their Derivatives in Organic Synthesis
#. ChemistrySelect 2021. [DOI: 10.1002/slct.202101719] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sakkani Nagaraju
- Department of Chemistry National Institute of Technology Warangal-506 004 India 2677
| | - Kota Sathish
- Department of Chemistry National Institute of Technology Warangal-506 004 India 2677
| | - Dhurke Kashinath
- Department of Chemistry National Institute of Technology Warangal-506 004 India 2677
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7
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Wang L, Yang F, Xu X, Jiang J. Organocatalytic 1,6-hydrophosphination of para-quinone methides: enantioselective access to chiral 3-phosphoxindoles bearing phosphorus-substituted quaternary carbon stereocenters. Org Chem Front 2021. [DOI: 10.1039/d0qo01638a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient organocatalytic enantioselective 1,6-hydrophosphonylation of para-quinone methides has been achieved for the construction of phosphorus-substituted quaternary carbon stereocenters.
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Affiliation(s)
- Lisheng Wang
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning
- P. R. China
- Medicinal College
| | - Fuxing Yang
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning
- P. R. China
| | - Xiaoping Xu
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning
- P. R. China
| | - Jun Jiang
- School of Chemistry and Chemical Engineering
- Guangxi University
- Nanning
- P. R. China
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8
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Huang Y, Wang L, Li J, Qiu H, Leung PH. Enantioselective C,P-Palladacycle-Catalyzed Arylation of Imines. ACS OMEGA 2020; 5:15936-15941. [PMID: 32656414 PMCID: PMC7345393 DOI: 10.1021/acsomega.0c01124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/08/2020] [Indexed: 06/11/2023]
Abstract
Chiral diarylmethylamines are of great interest because of their prevalence in biological and pharmaceutical sciences. Herein, we report a C,P-palladacycle-catalyzed enantioselective synthesis of chiral diarylmethylamines via asymmetric arylation of N-protected imines with arylboronic acids. The C,P-palladacycle showed high reactivity (up to 99% yield) and enantioselectivity (up to 99% ee) toward this arylation, enabling the tolerance of a wide range of functionalities, providing a convenient and efficient access to enantiomerically enriched diarylmethylamines. The absolute configuration of the product was well rationalized by the proposed stereochemical pathway and the catalytical cycle.
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Affiliation(s)
- Yinhua Huang
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Lijun Wang
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Junbao Li
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Huayu Qiu
- College
of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Pak-Hing Leung
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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9
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Dočekal V, Petrželová S, Císařová I, Veselý J. Enantioselective Cyclopropanation of 4‐Nitroisoxazole Derivatives. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000231] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Vojtěch Dočekal
- Department of Organic Chemistry, Faculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Simona Petrželová
- Department of Teaching and Didactics of Chemistry, Faculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Jan Veselý
- Department of Organic Chemistry, Faculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
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10
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Yue W, Xiao J, Zhang S, Yin L. Rapid Synthesis of Chiral 1,2‐Bisphosphine Derivatives through Copper(I)‐Catalyzed Asymmetric Conjugate Hydrophosphination. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916076] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Wen‐Jun Yue
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Jun‐Zhao Xiao
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Shuai Zhang
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Liang Yin
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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11
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Rapid Synthesis of Chiral 1,2‐Bisphosphine Derivatives through Copper(I)‐Catalyzed Asymmetric Conjugate Hydrophosphination. Angew Chem Int Ed Engl 2020; 59:7057-7062. [DOI: 10.1002/anie.201916076] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Indexed: 12/14/2022]
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12
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Ray Choudhury A, Mukherjee S. Deconjugated butenolide: a versatile building block for asymmetric catalysis. Chem Soc Rev 2020; 49:6755-6788. [PMID: 32785345 DOI: 10.1039/c9cs00346k] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Deconjugated butenolides have emerged as a popular synthon for the enantioselective synthesis of γ-lactones. This review provides a comprehensive overview on the catalytic asymmetric reactions of deconjugated butenolides reported till date.
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Affiliation(s)
| | - Santanu Mukherjee
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560 012
- India
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13
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Recent advances in Pd-catalyzed asymmetric addition reactions. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2020.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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14
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Kukowski JE, Smoliakova IP. Advancements in C–PR2 (R = Alkyl or Aryl) Bond Formation Reactions Involving Palladium. MINI-REV ORG CHEM 2019. [DOI: 10.2174/1570193x15666180509120846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review covers recent approaches to the synthesis of tertiary phosphines through the C–
PR<sub>2</sub> (R = alkyl or aryl) bond formation reactions using palladium. The methods include Pd-catalyzed
additions of HPR2 to double and triple bonds, substitution and dynamic kinetic resolution of diaryl
(pseudo) halide compounds, reactions of cyclopalladated complexes with MPR<sub>2</sub> (M = Li or K) or HPR<sub>2</sub>,
intramolecular phosphination, and C–P<sup>+</sup> bond cleavages. Together these methods allow for the preparation
of diversely functionalized achiral or enantiopure tertiary phosphines for use in organo- and transition
metal catalysis among other important applications.
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Affiliation(s)
- Jonathan E. Kukowski
- Department of Chemistry, University of North Dakota, Grand Forks, ND 58202-9024, United States
| | - Irina P. Smoliakova
- Department of Chemistry, University of North Dakota, Grand Forks, ND 58202-9024, United States
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15
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Lu Z, Zhang H, Yang Z, Ding N, Meng L, Wang J. Asymmetric Hydrophosphination of Heterobicyclic Alkenes: Facile Access to Phosphine Ligands for Asymmetric Catalysis. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04787] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zhiwu Lu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Haoyang Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhiping Yang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ning Ding
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
| | - Ling Meng
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Chemistry, Hong Kong University of Science and Technology, Hong Kong
| | - Jun Wang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
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16
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Li X, Chen Y, Pang BP, Tan J, Li Y, Pullarkat SA, Leung P. Efficient Synthesis of Malonate Functionalized Chiral Phosphapalladacycles and their Catalytic Evaluation in Asymmetric Hydrophosphination of Chalcone. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Xi‐Rui Li
- Division of Chemistry & Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Singapore
| | - Yu Chen
- Department of Chemistry and Biochemistry Queens College of the City University of New York 65‐30 Kissena Blvd. 11367 Queens New York United States
- Ph.D. Program in Chemistry The Graduate Center of the City University of New York 365 Fifth Ave. 10016 New York New York United States
| | - Benjamin Piaoxiang Pang
- Division of Chemistry & Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Singapore
| | - Jaeyu Tan
- Division of Chemistry & Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Singapore
| | - Sumod A. Pullarkat
- Division of Chemistry & Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Singapore
| | - Pak‐Hing Leung
- Division of Chemistry & Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Singapore
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17
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Zheng K, Liu X, Feng X. Recent Advances in Metal-Catalyzed Asymmetric 1,4-Conjugate Addition (ACA) of Nonorganometallic Nucleophiles. Chem Rev 2018; 118:7586-7656. [PMID: 30047721 DOI: 10.1021/acs.chemrev.7b00692] [Citation(s) in RCA: 191] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The metal-catalyzed asymmetric conjugate addition (ACA) reaction has emerged as a general and powerful approach for the construction of optically active compounds and is among the most significant and useful reactions in synthetic organic chemistry. In recent years, great progress has been made in this area with the use of various chiral metal complexes based on different chiral ligands. This review provides comprehensive and critical information on the enantioselective 1,4-conjugate addition of nonorganometallic (soft) nucleophiles and their importance in synthetic applications. The literature is covered from the last 10 years, and a number of examples from before 2007 are included as background information. The review is divided into multiple parts according to the type of nucleophile involved in the reaction (such as C-, B-, O-, N-, S-, P-, and Si-centered nucleophiles) and metal catalyst systems used.
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Affiliation(s)
- Ke Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , P. R. China
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18
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Lim KMH, Hayashi T. Dynamic Kinetic Resolution in Rhodium-Catalyzed Asymmetric Arylation of Phospholene Oxides. J Am Chem Soc 2017; 139:8122-8125. [DOI: 10.1021/jacs.7b04570] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kelvin Meng-Hui Lim
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Institute
of Materials Research and Engineering, A*STAR, 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Tamio Hayashi
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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19
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Jia YX, Yang XY, Tay WS, Li Y, Pullarkat SA, Xu K, Hirao H, Leung PH. Computational and carbon-13 NMR studies of Pt-C bonds in P-C-P pincer complexes. Dalton Trans 2016; 45:2095-101. [PMID: 26483364 DOI: 10.1039/c5dt02049b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A (13)C{(1)H} NMR based investigation was conducted to examine the electronic properties of C(aryl)-M bonds and their trans influence in P-C(aryl)-P pincer complexes. A series of structurally related platinum pincer complexes were rationally designed and their corresponding (13)C-(195)Pt coupling constants were systematically examined. By methodical substitution of the ligand trans to the organometallic C(aryl)-Pt bond, this study revealed the significant influence of the ligands on the nature of the C(aryl)-M bonds. The single crystal X-ray analysis of the complexes and computational studies further confirmed the observations that the C-M bond exhibits significant π-character.
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Affiliation(s)
- Yu-Xiang Jia
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371.
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20
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Li XR, Chew RJ, Li Y, Leung PH. Investigation of Functional Group Effects on Palladium Catalysed Asymmetric P–H Addition. Aust J Chem 2016. [DOI: 10.1071/ch15577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The pincer catalysed asymmetric P–H addition of diphenylphosphine to 3-benzylidene-2,4-pentadione is herein reported. Albeit successful in catalysing a series of similar substrates, unexpected chelation of the dione substrate to a CP and CN palladacycle catalyst resulted in inactivation of the catalyst with adjacent coordination sites. Protected phosphine adducts were isolated and characterised, providing critical insights to the choice of catalyst for structurally distinct functional groups borne by the substrate.
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21
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Liu K, Xiong Y, Wang ZF, Tao HY, Wang CJ. Ligand-controlled stereodivergent 1,3-dipolar cycloaddition of azomethine ylides with 3-methyl-4-nitro-5-styrylisoxazoles. Chem Commun (Camb) 2016; 52:9458-61. [DOI: 10.1039/c6cc03169b] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An unprecedented Ag(i)-catalyzed ligand-controlled stereodivergent 1,3-dipolar cycloaddition of azomethine ylides with 3-methyl-4-nitro-5-styrylisoxazoles has been developed to afford heterocycles bearing both methylisoxazole and pyrrolidine moieties.
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Affiliation(s)
- Kang Liu
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Yong Xiong
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Zuo-Fei Wang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Hai-Yan Tao
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Chun-Jiang Wang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
- State Key Laboratory of Organometallic Chemistry
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22
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Chew RJ, Leung PH. Our Odyssey with Functionalized Chiral Phosphines: From Optical Resolution to Asymmetric Synthesis to Catalysis. CHEM REC 2015; 16:141-58. [DOI: 10.1002/tcr.201500220] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Indexed: 02/05/2023]
Affiliation(s)
- Renta Jonathan Chew
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry; Nanyang Technological University; 21 Nanyang Link Singapore 637371 Singapore
| | - Pak-Hing Leung
- School of Physical and Mathematical Sciences Division of Chemistry and Biological Chemistry; Nanyang Technological University; 21 Nanyang Link Singapore 637371 Singapore
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23
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Jia YX, Jonathan Chew R, Li BB, Zhu P, Li Y, Pullarkat SA, Soon Tan N, Leung PH. Palladacycle promoted base controlled regio- and enantioselective hydrophosphination of 2-pyridylacrylate/amide and the cytotoxicity of their gold complexes. Dalton Trans 2015; 44:17557-64. [PMID: 26391200 DOI: 10.1039/c5dt02694f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The regioselective asymmetric hydrophosphination of pyridine-functionalized alkenes can be achieved in the presence of stoichiometric amounts of the chiral palladium complex (R)-1. The presence or absence of base affords the respective β- and α-adducts with excellent regiocontrol. Chiral gold-phosphine complexes incorporating the adducts exhibited good in vitro anticancer activity against the breast cancer cell line MDA-MB-231. Selectivity between the cancer cell line and normal cells was also observed.
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Affiliation(s)
- Yu-Xiang Jia
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
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24
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Chew RJ, Sepp K, Li BB, Li Y, Zhu PC, Tan NS, Leung PH. An Approach to the Efficient Syntheses of Chiral Phosphino- Carboxylic Acid Esters. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500638] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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25
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Yang XY, Tay WS, Li Y, Pullarkat SA, Leung PH. Asymmetric 1,4-Conjugate Addition of Diarylphosphines to α,β,γ,δ-Unsaturated Ketones Catalyzed by Transition-Metal Pincer Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00787] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiang-Yuan Yang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Wee Shan Tay
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Yongxin Li
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Sumod A. Pullarkat
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Pak-Hing Leung
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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26
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Xu Y, Yang Z, Ding B, Liu D, Liu Y, Sugiya M, Imamoto T, Zhang W. Asymmetric Michael addition of diphenylphosphine to β,γ-unsaturated α-keto esters catalyzed by a P-stereogenic pincer-Pd complex. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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27
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Hu F, Szostak M. Recent Developments in the Synthesis and Reactivity of Isoxazoles: Metal Catalysis and Beyond. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500319] [Citation(s) in RCA: 220] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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28
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Zalevskaya OA, Gur’eva YA, Slepukhin PA, Kuchin AV. cis-Di-µ-chlorobis{(1S,4S)-2-[benzylimino]-7,7-dimethylbicyclo[2.2.1]heptylmethyl-C,N}dipalladium(II) and trans-dichlorobis{(1S,4S)-2-[benzylimino]-1,7,7-trimethylbicyclo[2.2.1]heptane-N}palladium(II): Syntheses and structural studies. RUSS J COORD CHEM+ 2015. [DOI: 10.1134/s1070328415080114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Chauhan P, Mahajan S, Raabe G, Enders D. Organocatalytic one-pot 1,4-/1,6-/1,2-addition sequence for the stereocontrolled formation of six consecutive stereocenters. Chem Commun (Camb) 2015; 51:2270-2. [PMID: 25563802 PMCID: PMC4612129 DOI: 10.1039/c4cc09730k] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An unprecedented stereoselective organocatalytic one-pot 1,4-/1,6-/1,2-addition sequence between β-dicarbonyl compounds, β-nitroalkenes and 4-nitro-5-styrylisoxazoles sequentially catalyzed by low loading of a squaramide catalyst and an achiral base has been developed. The protocol opens an efficient entry to isoxazole bearing cyclohexanes with six consecutive stereogenic centers including one tetrasubstituted carbon in good yields and excellent diastereo- and enantioselectivities.
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Affiliation(s)
- Pankaj Chauhan
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany.
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30
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Gorunova ON, Novitskiy IM, Livantsov MV, Grishin YK, Kochetkov KA, Dunina VV. Enantiopurity determination of CN-palladacycles using 31P NMR spectroscopy with (1R,2S,5R)-menthyloxydiphenylphosphine as chiral derivatizing agent. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.02.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Yang XY, Tay WS, Li Y, Pullarkat SA, Leung PH. Versatile Syntheses of Optically Pure PCE Pincer Ligands: Facile Modifications of the Pendant Arms and Ligand Backbones. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00132] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiang-Yuan Yang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
| | - Wee Shan Tay
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
| | - Yongxin Li
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
| | - Sumod A. Pullarkat
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
| | - Pak-Hing Leung
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
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32
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Zhang Y, Wei B, Lin H, Cui W, Zeng X, Fan X. Organocatalyzed Asymmetric Vinylogous Michael Reactions of 3,5-Dialkyl-Substituted 4-Nitroisoxazoles: A Direct Method for the Synthesis of Chiral Isoxazole Derivatives. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400833] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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33
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Chew RJ, Li XR, Li Y, Pullarkat SA, Leung PH. Pd-Catalyzed Enantiodivergent and Regiospecificphospha-Michael Addition of Diphenylphosphine to 4-oxo-Enamides: Efficient Access to Chiral Phosphinocarboxamides and Their Analogues. Chemistry 2015; 21:4800-4. [DOI: 10.1002/chem.201406298] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Indexed: 11/10/2022]
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34
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Li Y, López-Delgado FJ, Jørgensen DKB, Nielsen RP, Jiang H, Jørgensen KA. Trienamine-mediated asymmetric [4+2]-cycloaddition of α,β-unsaturated ester surrogates applying 4-nitro-5-styrylisoxazoles. Chem Commun (Camb) 2014; 50:15689-91. [DOI: 10.1039/c4cc08171d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Jia YX, Li BB, Li Y, Pullarkat SA, Xu K, Hirao H, Leung PH. Stereoelectronic and Catalytic Properties of Chiral Cyclometalated Phospha-palladium and -platinum Complexes. Organometallics 2014. [DOI: 10.1021/om500662q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Yu-Xiang Jia
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Bin-Bin Li
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Sumod A. Pullarkat
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Kai Xu
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Hajime Hirao
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Pak-Hing Leung
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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36
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Hao XQ, Huang JJ, Wang T, Lv J, Gong JF, Song MP. PCN pincer palladium(II) complex catalyzed enantioselective hydrophosphination of enones: synthesis of pyridine-functionalized chiral phosphine oxides as NC(sp(3))O pincer preligands. J Org Chem 2014; 79:9512-30. [PMID: 25233005 DOI: 10.1021/jo5015307] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A series of chiral PCN pincer Pd(II) complexes VI-XIII with aryl-based aminophosphine-imidazoline or phosphinite-imidazoline ligands were synthesized and characterized. They were examined as enantioselective catalysts for the hydrophosphination of enones. Among them, complex IX, which features a Ph2PO donor as well as an imidazoline donor with (4S)-phenyl and N-Tol-p groups, was found to be the optimal catalyst. Thus, in the presence of 2-5 mol % of complex IX a wide variety of enones reacted smoothly with diarylphosphines to give the corresponding chiral phosphine derivatives in high yields with enantioselectivities of up to 98% ee. In particular, heteroaryl species such as 2-thienyl-, 2-furyl-, and 2-pyridinyl-containing enones that have a strong coordination ability to the Pd center were also appropriate substrates for the current catalytic system. For example, hydrophosphination of 2-alkenoylpyridines with diphenylphosphine followed by oxidation with H2O2 afforded the corresponding pyridine-functionalized chiral phosphine oxides in good yields with good to excellent enantioselectivities (10 examples, up to 95% ee). Furthermore, it had been demonstrated that the obtained pyridine-containing phosphine oxide acted as a tridentate ligand in the reaction with PdCl2 to form an intriguing NCsp(3)O pincer Pd(II) complex via Csp(3)-H bond activation, which to our knowledge is the first example of a chiral DCsp(3)D' Pd pincer (D ≠ D'; D and D' denote donor atoms such as P, N, etc.).
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Affiliation(s)
- Xin-Qi Hao
- College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University , Zhengzhou 450001, People's Republic of China
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37
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Chew RJ, Lu Y, Jia YX, Li BB, Wong EHY, Goh R, Li Y, Huang Y, Pullarkat SA, Leung PH. Palladacycle Catalyzed Asymmetric PH Addition of Diarylphosphines toN-Enoyl Phthalimides. Chemistry 2014; 20:14514-7. [DOI: 10.1002/chem.201403885] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Indexed: 11/09/2022]
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38
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Chew RJ, Teo KY, Huang Y, Li BB, Li Y, Pullarkat SA, Leung PH. Enantioselective phospha-Michael addition of diarylphosphines to β,γ-unsaturated α-ketoesters and amides. Chem Commun (Camb) 2014; 50:8768-70. [PMID: 24968261 DOI: 10.1039/c4cc01610f] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An enantioselective hydrophosphination of β,γ-unsaturated α-ketoesters and amides has been developed using a chiral palladacycle catalyst. Adducts can be obtained in excellent yields and enantioselectivities, providing direct access to chiral tertiary phosphines which are synthetically useful intermediates in the preparation of bidentate ligands.
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Affiliation(s)
- Renta Jonathan Chew
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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39
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Yap JSL, Li BB, Wong J, Li Y, Pullarkat SA, Leung PH. Development of a novel chiral palladacycle and its application in asymmetric hydrophosphination reaction. Dalton Trans 2014; 43:5777-84. [PMID: 24573121 DOI: 10.1039/c4dt00062e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel amine ligand, 1-(2,5-dichlorophenyl)-N,N-dimethylethanamine, was synthesized from 1-(2,5-dichlorophenyl)ethanone via a three step synthetic route. Direct ortho-palladation of the amine ligand with Pd(OAc)(2) gave the racemic dimeric complex in high yield. This racemic palladacycle was efficiently resolved through the formation of its (S)-prolinato derivatives. The resulting diastereomeric complexes were separated efficiently by column chromatography. In the solid state, the structure and absolute configuration of the two optically resolved palladium complexes were determined by single crystal X-ray crystallography. In solution, their absolute conformations were also investigated by the 2D (1)H-(1)H rotating frame nuclear Overhauser enhancement (ROESY) NMR spectroscopy. Both (R,R) and (S,S)-di-μ-chloro dimeric palladium complexes could be obtained chemoselectively by treating the corresponding prolinato derivatives with dilute hydrochloric acid. The amine auxiliary could be subsequently removed from the palladium center by treatment with concentrated hydrochloric acid. The enantiomerically pure palladacycle was used to promote the asymmetric hydrophosphination reaction between diphenylphosphine and dimethyl acetylenedicarboxylate. The (31)P{(1)H} NMR spectroscopy indicated that only one stereo-isomeric product was formed.
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Affiliation(s)
- Jeanette See Leng Yap
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, Singapore.
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40
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41
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Koshti V, Gaikwad S, Chikkali SH. Contemporary avenues in catalytic PH bond addition reaction: A case study of hydrophosphination. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.01.006] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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42
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Huang Y, Li Y, Leung PH, Hayashi T. Asymmetric Synthesis of P-Stereogenic Diarylphosphinites by Palladium-Catalyzed Enantioselective Addition of Diarylphosphines to Benzoquinones. J Am Chem Soc 2014; 136:4865-8. [DOI: 10.1021/ja501007t] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yinhua Huang
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371, Singapore
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Yongxin Li
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Pak-Hing Leung
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Tamio Hayashi
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Institute
of Materials Research and Engineering, A*STAR, 3 Research Link, Singapore 117602, Singapore
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43
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See Leng Yap J, Chen HJ, Li Y, Pullarkat SA, Leung PH. Synthesis, Optical Resolution, and Stereochemical Properties of a Rationally Designed Chiral C–N Palladacycle. Organometallics 2014. [DOI: 10.1021/om401044z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeanette See Leng Yap
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Houguang Jeremy Chen
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Sumod A. Pullarkat
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Pak-Hing Leung
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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44
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Geng ZC, Zhang JX, Li N, Chen J, Huang XF, Zhang SY, Li HY, Tao JC, Wang XW. Construction of highly substituted pyrazole derivatives with P–C bond: access to racemic and enantioselective forms by conjugate addition of diarylphosphane oxides to α,β-unsaturated pyrazolones. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.038] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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45
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Chen S, Chiew JX, Pullarkat SA, Li Y, Leung P. Stability and Reactivity of Cyclometallated Naphthylamine Complexes in Pd–C Bond Insertion Reactions with Coordinated Alkynylphosphanes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300834] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shuli Chen
- King Abdullah University of Science & Technology, KAUST Catalysis Center (KCC), 23955‐6900 Thuwal, Saudi Arabia
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 637616 Singapore, http://www.ntu.edu.sg/Pages/home.aspx
| | - Jun Xuan Chiew
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 637616 Singapore, http://www.ntu.edu.sg/Pages/home.aspx
| | - Sumod A. Pullarkat
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 637616 Singapore, http://www.ntu.edu.sg/Pages/home.aspx
| | - Yongxin Li
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 637616 Singapore, http://www.ntu.edu.sg/Pages/home.aspx
| | - Pak‐Hing Leung
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 637616 Singapore, http://www.ntu.edu.sg/Pages/home.aspx
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46
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Zhang J, Liu X, Ma X, Wang R. Organocatalyzed asymmetric vinylogous Michael addition of α,β-unsaturated γ-butyrolactam. Chem Commun (Camb) 2013; 49:9329-31. [DOI: 10.1039/c3cc44059a] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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