1
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Wang N, Huang Y, Zi Y, Wang M, Huang W. P(NMe 2) 3-Mediated Regioselective N-Alkylation of 2-Pyridones via Direct Deoxygenation of α-Keto Esters. J Org Chem 2024; 89:3657-3665. [PMID: 38366991 DOI: 10.1021/acs.joc.3c02819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
A practical and regioselective direct N-alkylation of 2-pyridones is enabled by use of α-keto esters in the P(NMe2)3-mediated deoxygenation process. The reaction proceeds under mild conditions to produce N-alkylated 2-pyridones with high selectivity and generality, and the protocol is shown to be applicable for the scale-up synthesis, which makes it promising for practical applications.
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Affiliation(s)
- Nan Wang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Yuanyuan Huang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - You Zi
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Mengke Wang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Weichun Huang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
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2
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Bi H, Chu J, Zhao XL, Wang SR. Ni-Catalyzed 1,5-Sigmatropic Ester Shift on Cyclopentadiene Rings: Regioselective Conversion of 5,5-Disubstituted Cyclopentadienes to CH 2-Cyclopentadienes. Org Lett 2024; 26:1437-1441. [PMID: 38345600 DOI: 10.1021/acs.orglett.4c00062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Described herein is a nickel(II)-catalyzed regioselective rearrangement of 5,5-disubstituted cyclopentadienes to fully functionalized CH2-cyclopentadienes via successive 1,5-sigmatropic shifts of the ester group on the quaternary carbon and hydrogen under mild basic conditions. The obtained CH2-cyclopentadienes were also readily applied in the preparation of highly functionalized dibenzo[e,g]azulene derivatives in two steps.
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Affiliation(s)
- Hongyan Bi
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Jiaxin Chu
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Xiao-Li Zhao
- Shanghai Key Laboratory of Green Chemistry & Chemical Processes, East China Normal University, Shanghai 200062, China
- State Key Laboratory of Petroleum Molecular & Process Engineering, East China Normal University, Shanghai 200062, China
| | - Sunewang R Wang
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, China
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3
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Jeong I, Kim HE, Choi JH, Chung WJ. Relayed Heteroatom Group Transfer: A Structural Reorganization between Bisthioester and Triaminophosphine to α,α-Disulfenylamide. Org Lett 2023; 25:9076-9081. [PMID: 38079454 DOI: 10.1021/acs.orglett.3c04020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Simultaneous multiple displacements of organic molecules can lead to a large structural reconstruction with increased complexity that would be difficult to access otherwise. Whereas double displacement such as olefin metathesis is well-established, higher-order versions remain much more challenging, because of their intrinsic thermodynamic disadvantages. Here, we describe a newly discovered relayed heteroatom group transfer process between bisthioesters and triaminophosphines as an unusual example of a formal triple displacement. Through the oxygen/nitrogen exchange between the two simple starting materials, in addition to the 1,2-sulfur migration of a putative carbene intermediate, an organized relocation of the O/S/N groups proceeded to give a variety of α,α-disulfenylamides with excellent efficiency under ambient conditions. The experimental and computational mechanistic studies revealed the sequence of the relayed group shifts via an α,α-disulfenyl phosphonium enolate intermediate as well as the dual role of triaminophosphine as both an oxygen acceptor and a nitrogen donor.
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Affiliation(s)
- Ilju Jeong
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Ha Eun Kim
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Jun-Ho Choi
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Won-Jin Chung
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
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4
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Takeda N, Maeda R, Yasui M, Ueda M. Synthesis of oxime ethers via a formal reductive O-H bond insertion of oximes to α-keto esters. Chem Commun (Camb) 2023; 60:172-175. [PMID: 38053438 DOI: 10.1039/d3cc05522a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
This study describes an efficient approach to access oxime ethers via P(III)-mediated O-H bond insertion reaction of oximes with α-keto esters. The strategy involves the protonation of in situ generated Kukhtin-Ramirez adducts, followed by SN2-type reaction. Important features include a good functional group tolerance, operational simplicity, and application to gram scale synthesis and the synthesis of an acaricide.
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Affiliation(s)
- Norihiko Takeda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Ryoya Maeda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Motohiro Yasui
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Masafumi Ueda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
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5
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Huang Y, Wang N, Wu ZG, Wu X, Wang M, Huang W, Zi Y. Sequential In Situ-Formed Kukhtin-Ramirez Adduct and P(NMe 2) 3-Catalyzed O-Phosphination of α-Dicarbonyls with P(O)-H. Org Lett 2023; 25:7595-7600. [PMID: 37830918 DOI: 10.1021/acs.orglett.3c02563] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
O-Phosphination of α-dicarbonyls via sequential in situ formation of a Kukhtin-Ramirez adduct and a P(NMe2)3-catalyzed process has been exploited for the synthesis of α-phosphoryloxy carbonyls. A range of P(O)-H derivatives, including diarylphosphine oxides, arylphosphinates, and phosphinates, are competent candidates to be introduced into the α-dicarbonyls in this transformation, and various α-phosphoryloxy carbonyls are obtained. This approach possesses advantages of mild conditions, simple operations, atom economy, high efficiency, and gram-scale synthesis, which make it promising in the synthesis toolbox.
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Affiliation(s)
- Yuanyuan Huang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Nan Wang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Zheng-Guang Wu
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Xinxing Wu
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Mengke Wang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - Weichun Huang
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
| | - You Zi
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, P. R. China
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6
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Sar S, Ghorai P. An Intramolecular Umpolung Cascade Kukhtin-Ramirez Reaction/Michael Addition-Initiated Cyclization: Stereoselective Synthesis of Tetrasubstituted Cyclopropane Fused 1-Indanones. Org Lett 2023; 25:1946-1951. [PMID: 36920108 DOI: 10.1021/acs.orglett.3c00494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Herein, we disclose a fascinating highly stereoselective P(NMe2)3 mediated intramolecular deoxygenative umpolung cascade Michael addition-initiated cyclopropanation with a diverse substrate adaptability. This methodology creates a new horizon for expedient access to valuable 6,5,3-fused scaffolds having an all-carbon quaternary stereocenter via Kukhtin-Ramirez (K-R) adduct formation, with excellent diastereoselectivity and yields under metal-free ambient conditions. A few functional group transformations have also been performed successfully. Additionally, an asymmetric catalytic attempt using (R)-(+)-H8-BINOL has delivered good enantioselectivity.
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Affiliation(s)
- Suman Sar
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462066, India
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7
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Wang H, Yang R, Xu B. Synthesis of Cyclopropenes and Fluorinated Cyclopropanes via Michael Initiated Ring Closure of Alkyl Triflones. Chemistry 2022; 28:e202104364. [DOI: 10.1002/chem.202104364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Hui Wang
- Key Laboratory of Science and Technology of Eco-Textiles Ministry of Education College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 P. R. China
| | - Ren‐Yin Yang
- Key Laboratory of Science and Technology of Eco-Textiles Ministry of Education College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 P. R. China
| | - Bo Xu
- Key Laboratory of Science and Technology of Eco-Textiles Ministry of Education College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 P. R. China
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8
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Son Y, Hwang S, Bak S, Kim HE, Choi JH, Chung WJ. α-Fluoroamine synthesis via P(III)-mediated deoxygenative geminal fluorosulfonimidation of 1,2-diketones. Org Biomol Chem 2022; 20:3263-3267. [PMID: 35354199 DOI: 10.1039/d2ob00498d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A deoxygenative geminal fluorosulfonimidation of 1,2-diketones was achieved for the synthesis of tetrasubstituted α-fluoroamines under mild conditions. In this study, a transition metal-free formal N-F insertion of N-fluorobenzenesulfonimide was enabled via the Kukhtin-Ramirez reaction employing a dealkylation-resistant P(III) reagent developed in our laboratory. Computational analysis was also performed to obtain a general mechanistic picture, which explained the reactivity and selectivity for this type of reaction.
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Affiliation(s)
- Yeri Son
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Sunjoo Hwang
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Sujin Bak
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Ha Eun Kim
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Jun-Ho Choi
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Won-Jin Chung
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
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9
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Fu Y, Bi H, Lei S, Wang SR. Brønsted acid promoted substrate-dependent regiodivergent alkynylcyclopropane–cyclopentadiene rearrangement assisted by the internal carbonyl group. Org Chem Front 2022. [DOI: 10.1039/d2qo01048h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Facile Brønsted acid promoted alkynylcyclopropane–cyclopentadiene rearrangement, avoiding the five-membered cycloallene intermediate assisted by the internal carbonyl groups, has been developed.
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Affiliation(s)
- Yue Fu
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
| | - Hongyan Bi
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
| | - Siling Lei
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
| | - Sunewang R. Wang
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 500 Dongchuan Lu, Shanghai 200241, China
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10
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Feixue X, Jianwei Z, Taishan Y, Jie H, Zhengjie H. Synthesis of Polysubstituted 2,3-Dihydrofurans via P(NMe 2) 3- Mediated [1+4] Annulation of 1,2-Dicarbonyl Compounds with α, β-Unsaturated Ketones. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202205021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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11
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Zhang Z, Jing L, Li E, Duan Z. Cooperative Palladium-Catalyzed and P(NEt2)3-Mediated (4+1) Annulation of Isatins with 2-Hydroxymethylallylcarbonates. Org Chem Front 2022. [DOI: 10.1039/d2qo00231k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
P(NR2)3-promoted transformations of isatins with electron-withdrawing alkenes have received consistently attention over the last decades. However, no example involving chemical transformations of nonactivated or weakly activated alkenes is discovered in...
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12
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Wang SR, Shao J, An C. Facile Synthesis of Polysubstituted 2-Pyrones via TfOH-Mediated Ring Expansion of 2-Acylcyclopropane-1-carboxylates. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1526-7839] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractA facile route to polysubstituted 2-pyrones from readily available 2-acylcyclopropane-1-aryl-1-carboxylates mediated by TfOH is reported. The strongly donating 1-aryl group is important for directing the C–C bond cleavage of the donor-acceptor cyclopropane ring, which then leads to the formation of the 2-pyrone ring through lactonization.
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Affiliation(s)
- Sunewang R. Wang
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University
| | - Jiru Shao
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University
| | - Caiyun An
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University
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13
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Qiu Y, Lu K, Wei B, Qian Z, He Z. P III-Mediated Intramolecular Cyclopropanation and Synthesis of Cyclopropa[ c]coumarins. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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