1
|
Adhikari P, Bhattacharyya D, Deori K, Sarmah BK, Das A. Chemo- and Regioselective Catalytic Cross-Coupling Reaction of Ketones for the Synthesis of β, γ-Disubstituted β, γ-Unsaturated Ketones. Chemistry 2023:e202303206. [PMID: 38140820 DOI: 10.1002/chem.202303206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/09/2023] [Accepted: 12/21/2023] [Indexed: 12/24/2023]
Abstract
C-C bond forming reaction of ketone with aldehyde is well-studied for the synthesis of α, β-unsaturated ketones, however, the reaction with two different ketones to unsaturated carbonyl compound has not yet been systematically studied. Probably due to the relatively low reactivity of ketones as electrophiles (aldol acceptors), its propensity for retro-aldol reaction. The reactions often suffer from unsatisfactory chemoselectivity (self- vs. crossed aldol products) and regioselectivity (thermodynamic vs. kinetic enolate). In this quest, we report here for the first time selective cross-coupling reaction of ketones to β-branched β, γ-unsaturated ketones by using ruthenium catalysis. Interestingly, single crossed aldol condensation products are formed even in reactions where a mixture of products is possible. Reaction is highly chemoselective, regioselective and produces H2 O as the only byproducts making the protocol environmentally benign. Method is compatible with a wide variety of sensitive functional group and applicable for even problematic aliphatic ketones as substrates. Notably, acetone was found as a three-carbon feedstock for the syntheses of simple β, γ-unsaturated ketone compounds. The process can further be extended to the gram-scale reaction and late-stage functionalization of natural products. With the help of DFT calculations, several control experiments, and deuterium-labeling experiments, the mechanistic finding demonstrated that initial aldol-condensation of ketones to a β, β-disubstituted α, β-unsaturated ketone, which further isomerizes to a β, γ- unsaturated ketone via η3 -allyl ruthenium complex.
Collapse
Affiliation(s)
- Priyanka Adhikari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| | - Dipanjan Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| | - Kritartha Deori
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| | - Bikash Kumar Sarmah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
- Department of Chemistry, Sonari College, Assam, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| |
Collapse
|
2
|
Zhou P, Huang L, Xie Y, Ma G, Feng H. Amine-catalyzed metal-free deamination of propargylamines with water toward chalcones. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
3
|
Cui JF, Yu Q, O WY, Huang LW, Yang B, Wong MK. Synthesis of 1 H-isoindoliums by electrophile-mediated cascade cyclization/iodination of propargylamine-based 1,6-diynes. Org Biomol Chem 2022; 20:3755-3762. [PMID: 35420116 DOI: 10.1039/d2ob00316c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A highly regio- and chemoselective synthesis of 1H-isoindoliums through a facile and novel cascade cyclization reaction of propargylamine-based 1,6-diynes under mild conditions has been developed. Different functional groups were compatible under the optimized reaction conditions, giving the corresponding products in up to 94% yields. Upon treatment with a base, the alkyne moiety of 1H-isoindoliums could be further transformed to allenes in excellent yields.
Collapse
Affiliation(s)
- Jian-Fang Cui
- Department of Chemistry, Southern University of Science and Technology, 1088 Xueyuan Blvd., Shenzhen 518055, China
| | - Qiong Yu
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| | - Wa-Yi O
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China. .,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| | - Li-Wu Huang
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| | - Bin Yang
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
| | - Man-Kin Wong
- State Key Laboratory of Chemical Biology and Drug Discovery, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China. .,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
| |
Collapse
|
4
|
Guo J, Xiong WB, Ma HR, Fan L, Zhou YY, Wong HNC, Cui JF. Optical resolution of 1,16-dihydroxytetraphenylene by chiral gold(iii) complexation and its applications as chiral ligands in asymmetric catalysis. Chem Sci 2022; 13:4608-4615. [PMID: 35656141 PMCID: PMC9020179 DOI: 10.1039/d2sc00388k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/23/2022] [Indexed: 11/21/2022] Open
Abstract
We report herein a novel approach involving optical resolution of (±)-1,16-dihydroxytetraphenylene (DHTP) by chiral gold(iii) complexation. This method features several key advantages, i.e., recyclability of chiral resolution reagents, feasibility of scaling up to gram quantities, and operational simplicity. On the basis of this method, which led to optically pure DHTP, a library of 2,15-diaryl (S)-DHTPs and several (S)-DHTP-derived phosphoramidite ligands were synthesized. Finally, the superior performance of a (S)-DHTP phosphoramidite ligand was demonstrated by efficient iridium-catalyzed asymmetric allylic alkynylation reactions.
Collapse
Affiliation(s)
- Jia Guo
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China
| | - Wen-Bin Xiong
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China
| | - Hao-Ran Ma
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China .,School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen) 2001 Longxiang Blvd Shenzhen 518172 China
| | - Luoyi Fan
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China
| | - You-Yun Zhou
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China
| | - Henry N C Wong
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China .,School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen) 2001 Longxiang Blvd Shenzhen 518172 China.,Department of Chemistry, The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR China
| | - Jian-Fang Cui
- Department of Chemistry, Southern University of Science and Technology 1088 Xueyuan Blvd Shenzhen 518055 China
| |
Collapse
|
5
|
de Souza AAN, Bartolomeu ADA, Brocksom TJ, Noël T, de Oliveira KT. Direct Synthesis of α-Sulfenylated Ketones under Electrochemical Conditions. J Org Chem 2022; 87:5856-5865. [PMID: 35417160 DOI: 10.1021/acs.joc.2c00147] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We investigated the electrochemical sulfenylation reaction in both batch and continuous flow regimes, involving thiophenols/thiols and enol-acetates to yield α-sulfenylated ketones, without using additional oxidants or catalysts. Studies with different electrolytes were also performed, revealing that quaternary ammonium salts are the best mediators for this reaction. Notably, during the study of the reaction scope, a Boc-cysteine proved to be extremely tolerant to our protocol, thus increasing its relevance. The methodology also proved to be scalable in both batch and continuous flow conditions, opening up possibilities for further studies since these relevant functional groups are important moieties in organic synthesis.
Collapse
Affiliation(s)
- Aline A N de Souza
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Aloisio de A Bartolomeu
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Timothy J Brocksom
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| | - Timothy Noël
- Van't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam (UVA), Science Park 904, Amsterdam 1098 XH, The Netherlands
| | - Kleber T de Oliveira
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, São Paulo 13565-905, Brazil
| |
Collapse
|