1
|
Peng H, Shahidi F. Metabolic, toxicological, chemical, and commercial perspectives on esterification of dietary polyphenols: a review. Crit Rev Food Sci Nutr 2024; 64:7465-7504. [PMID: 36908213 DOI: 10.1080/10408398.2023.2185589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Molecular modifications have been practiced for more than a century and nowadays they are widely applied in food, pharmaceutical, or other industries to manipulate the physicochemical, bioactivity, metabolic/catabolic, and pharmacokinetic properties. Among various structural modifications, the esterification/O-acylation has been well-established in altering lipophilicity and bioactivity of parent bioactive compounds, especially natural polyphenolics, while maintaining their high biocompatibility. Meanwhile, various classic chemical and enzymatic protocols and other recently emerged cell factory technology are being employed as viable esterification strategies. In this contribution, the main motivations of phenolic esterification, including the tendency to replace synthetic alkyl phenolics with safer alternatives in the food industry to improve the bioavailability of phenolics as dietary supplements/pharmaceuticals, are discussed. In addition, the toxicity, metabolism, and commercial application of synthetic and natural phenolics are briefly introduced. Under these contexts, the mechanisms and reaction features of several most prevalent chemical and enzymatic esterification pathways are demonstrated. In addition, insights into the studies of esterification modification of natural phenolic compounds and specific pros/cons of various reaction systems with regard to their practical application are provided.
Collapse
Affiliation(s)
- Han Peng
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| | - Fereidoon Shahidi
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
| |
Collapse
|
2
|
Bennett SH, Bestwick JS, Demertzidou VP, Jones DJ, Jones HE, Richard F, Homer JA, Street-Jeakings R, Tiberia AF, Lawrence AL. Stereoretentive enantioconvergent reactions. Nat Chem 2024; 16:1177-1183. [PMID: 38632365 PMCID: PMC11230902 DOI: 10.1038/s41557-024-01504-1] [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: 05/11/2023] [Accepted: 03/06/2024] [Indexed: 04/19/2024]
Abstract
Enantioconvergent reactions are pre-eminent in contemporary asymmetric synthesis as they convert both enantiomers of a racemic starting material into a single enantioenriched product, thus avoiding the maximum 50% yield associated with resolutions. All currently known enantioconvergent processes necessitate the loss or partial loss of the racemic substrate's stereochemical information, thus limiting the potential substrate scope to molecules that contain labile stereogenic units. Here we present an alternative approach to enantioconvergent reactions that can proceed with full retention of the racemic substrate's configuration. This uniquely stereo-economic approach is possible if the two enantiomers of a racemic starting material are joined together to form one enantiomer of a non-meso product. Experimental validation of this concept is presented using two distinct strategies: (1) a direct asymmetric coupling approach, and (2) a multicomponent approach, which exhibits statistical amplification of enantiopurity. Thus, the established dogma that enantioconvergent reactions require substrates that contain labile stereogenic units is shown to be incorrect.
Collapse
Affiliation(s)
- Steven H Bennett
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Jacob S Bestwick
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | | | - David J Jones
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Helen E Jones
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - François Richard
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Joshua A Homer
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | | | - Andrew F Tiberia
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Andrew L Lawrence
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK.
| |
Collapse
|
3
|
Luis NR, Chung KK, Hickey MR, Lin Z, Beutner GL, Vosburg DA. Beyond Amide Bond Formation: TCFH as a Reagent for Esterification. Org Lett 2024; 26:2745-2750. [PMID: 37364890 DOI: 10.1021/acs.orglett.3c01611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
In this Communication, an investigation of the combination of N,N,N',N'-tetramethylchloroformamidinium hexafluorophosphate (TCFH) and N-methylimidazole (NMI) for the synthesis of esters and thioesters is described. This work revealed the unique challenges of the reactions of less nucleophilic alcohols and more reactive thiols with the N-acyl imidazolium intermediate and led to the identification of general enabling conditions that provide high yields and selectivity for a range of alcohols and thiols.
Collapse
Affiliation(s)
- Nathaniel R Luis
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Kasey K Chung
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| | - Matthew R Hickey
- Chemical Process Development, Bristol Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Ziqing Lin
- Chemical Process Development, Bristol Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Gregory L Beutner
- Chemical Process Development, Bristol Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - David A Vosburg
- Department of Chemistry, Harvey Mudd College, 301 Platt Boulevard, Claremont, California 91711, United States
| |
Collapse
|
4
|
Ragab S, El Sikaily A, El Nemr A. Fabrication of dialysis membrane from cotton Giza 86 cellulose di-acetate prepared using Ac 2O and NiCl 2 as a new catalyst. Sci Rep 2023; 13:2276. [PMID: 36755140 PMCID: PMC9908872 DOI: 10.1038/s41598-023-29528-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 02/06/2023] [Indexed: 02/10/2023] Open
Abstract
This attempt has been made to synthesize the cellulose di-acetate in a solvent-free acetylation system of cotton Giza 86 cellulose with Ac2O (200 and 300 ml) in the presence of NiCl2.6HO (1.0, 1.5 and 2.0 g) as an effectively available and new catalyst by the conventional reflux and microwave irradiation methods. This study also illustrates the preparation of a dialysis membrane made from a cellulose di-acetate-dichloromethane-methanol-polyethylene glycol (MW: 200) casting solution. The microwave irradiation method for the synthesis of cellulose di-acetate showed excellent yields and short reaction time, which is an important feature of this method. The impact of the two methods on the cellulose di-acetate formation and its used in the dialysis membrane formulations was studied. The experimental degree of substitution of the prepared cellulose di-acetate values (DS = 2.00-2.7) showed an agreement with the calculated values by FTIR and 1H-NMR analysis methods. The formation of cellulose di-acetate with percentage yields varied from 62.85 to 89.85%. The applicability of the prepared membrane in dialysis operation was evaluated in terms of urea clearance, rejection of Bovine Serum Albumin (BSA) and flux of pure water. Characterization of cellulose di-acetate was achieved through 1H-NMR, FTIR, TGA, and BET analyses. The CA-PEG blend membrane was examined by contact angle measurement, porosity, and water uptake of the membrane. The cellulose acetate membrane surface morphology was determined using SEM. It is observable that the fabricated CA-PEG blend membrane from synthesized cellulose di-acetate by using Nickel chloride as a catalyst is showing remarkable rejection of BSA and urea clearance up to 100 and 67.2%, respectively. The present work is promising and applicable in dialysis membranes.
Collapse
Affiliation(s)
- Safaa Ragab
- grid.419615.e0000 0004 0404 7762Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Amany El Sikaily
- grid.419615.e0000 0004 0404 7762Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt
| | - Ahmed El Nemr
- Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, Alexandria, Egypt.
| |
Collapse
|
5
|
Metal-free selective acylation reaction of aliphatic alcohols in neutral condition. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-022-02694-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
6
|
Liu P, Li W, Liu X. A novel synthesis method of cyclopentadecanone and cyclopentadecanolide from vegetable oil. BMC Chem 2022; 16:46. [PMID: 35733143 PMCID: PMC9219129 DOI: 10.1186/s13065-022-00840-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/13/2022] [Indexed: 11/16/2022] Open
Abstract
Malania oleifera Chum is a unique renewable plant resource in China, its fruit oil has a high content of 15-tetracosenic acid, and it is a good raw material for the synthesis of cyclopentadecanone and cyclopentadecanolide. A Novel synthesis method of cyclopentadecanone and cyclopentadecanolide from vegetable oil was designed, and the synthesis yields of c cyclopentadecanone and cyclopentadecanolide were 38.5% and 63.0%, respectively. The effect of different ester groups on cyclization of α,ω-difatty acid alkyl ester in cyclopentadecanone synthesis, and effect of catalysts on cyclization ofω-hydroxycarboxylic acid triglyceride in cyclopentadecanolide synthesis were investigated. The designed synthesis strategy has the characteristics of less synthesis steps and high utilization efficiency of 15-tetracosenic acid, which has simple and economic.
Collapse
Affiliation(s)
- Pin Liu
- Department of Science and Technology, Guangxi University for Nationalities, Nanning, 530006, China
| | - Weiguang Li
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, China
| | - Xiongmin Liu
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, Guangxi, China.
| |
Collapse
|
7
|
Dentani T, Kawachi A, Kato M, Yoshimura T, Matsuo JI. Cascade cyclization of 1,2,7,8-tetraones and total synthesis of (±)-nesteretal A. Org Chem Front 2022. [DOI: 10.1039/d2qo00740a] [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
For the short synthesis of highly oxidized complex molecules, regioselectivity and stereoselectivity of intramolecular domino aldol cyclization/acetalizations of 1,2,7,8-tetraones were investigated by using catalytic amounts of Brønsted bases, Brønsted acids,...
Collapse
|
8
|
Wang Y, Nagai T, Watanabe I, Hagiwara K, Inoue M. Total Synthesis of Euonymine and Euonyminol Octaacetate. J Am Chem Soc 2021; 143:21037-21047. [PMID: 34870420 DOI: 10.1021/jacs.1c11038] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Euonymine (1) and euonyminol octaacetate (2) share the core structure of euonyminol (3), the most hydroxylated member of the dihydro-β-agarofuran family. In 2, eight of the nine hydroxy groups of 3 are acetylated, and 1 has six acetyl groups and a 14-membered bislactone comprising a pyridine dicarboxylic acid with two methyl groups. The different acylation patterns provide distinct biological activities: 1 and 2 display anti-HIV and P-glycoprotein inhibitory effects, respectively. The 11 contiguous stereocenters and 9 oxygen functionalities of the ABC-ring system of 1 and 2 represent a formidable challenge, which is further heightened by the macrocyclic structure of 1. Here we disclose an efficient synthetic strategy for enantioselective total synthesis of 1 and 2. Starting from (R)-glycerol acetonide, we constructed the B-ring by an Et3N-accelerated Diels-Alder reaction, the C-ring by intramolecular iodoetherification, and the A-ring by ring-closing olefin metathesis. The 10 stereocenters were installed through a series of substrate-controlled stereoselective C-C and C-O bond formations by exploiting the three-dimensional structures of judiciously designed substrates. These newly developed reaction sequences led to protected euonyminol 5, which served as a common intermediate for assembling 1 and 2. Global deprotection of 5 and subsequent acetylation produced 2. Alternatively, the discriminative protective groups of 5 allowed for site-selective bis-esterification to generate bislactone. Combining [3 + 2]-cycloaddition and reductive desulfurization introduced the last remaining stereocenters of the two methyl groups on the macrocycle. Finally, deprotection and acetylation gave rise to fully synthetic 1 for the first time.
Collapse
Affiliation(s)
- Yinghua Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Toshiya Nagai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Itsuki Watanabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Koichi Hagiwara
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| |
Collapse
|
9
|
Abstract
A benzyne-mediated esterification of carboxylic acids and alcohols under mild conditions has been realized, which is made possible via a selective nucleophilic addition of carboxylic acid to benzyne in the presence of alcohol. After a subsequent transesterification with alcohol, the corresponding esters can be produced efficiently. This benzyne-mediated protocol can be used on the modification of Ibuprofen, cholesterol, estradiol, and synthesis of nandrolone phenylpropionate. In addition, benzyne can also be used to promote lactonization and amidation reaction.
Collapse
Affiliation(s)
- Jinlong Zhao
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
| | - Jiarong Shi
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030
| | - Yang Li
- School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Chongqing, P. R. China, 400030.,College of Chemistry, Jilin University, Changchun, P. R. China, 130012
| |
Collapse
|
10
|
Fouilloux H, Qiang W, Robert C, Placet V, Thomas CM. Multicatalytic Transformation of (Meth)acrylic Acids: a One‐Pot Approach to Biobased Poly(meth)acrylates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106640] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hugo Fouilloux
- PSL University Chimie ParisTech CNRS Institut de Recherche de Chimie Paris 75005 Paris France
| | - Wei Qiang
- PSL University Chimie ParisTech CNRS Institut de Recherche de Chimie Paris 75005 Paris France
| | - Carine Robert
- PSL University Chimie ParisTech CNRS Institut de Recherche de Chimie Paris 75005 Paris France
| | - Vincent Placet
- FEMTO-ST Institute CNRS/UFC/ENSMM/UTBM Department of Applied Mechanics Université de Bourgogne Franche-Comté Besançon France
| | - Christophe M. Thomas
- PSL University Chimie ParisTech CNRS Institut de Recherche de Chimie Paris 75005 Paris France
| |
Collapse
|
11
|
Fouilloux H, Qiang W, Robert C, Placet V, Thomas CM. Multicatalytic Transformation of (Meth)acrylic Acids: a One-Pot Approach to Biobased Poly(meth)acrylates. Angew Chem Int Ed Engl 2021; 60:19374-19382. [PMID: 34152679 DOI: 10.1002/anie.202106640] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/02/2021] [Indexed: 12/21/2022]
Abstract
Shifting from petrochemical feedstocks to renewable resources can address some of the environmental issues associated with petrochemical extraction and make plastics production sustainable. Therefore, there is a growing interest in selective methods for transforming abundant renewable feedstocks into monomers suitable for polymer production. Reported herein are one-pot catalytic systems, that are active, productive, and selective under mild conditions for the synthesis of copolymers from renewable materials. Each system allows for anhydride formation, alcohol acylation and/or acid esterification, as well as polymerization of the formed (meth)acrylates, providing direct access to a new library of unique poly(meth)acrylates.
Collapse
Affiliation(s)
- Hugo Fouilloux
- PSL University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| | - Wei Qiang
- PSL University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| | - Carine Robert
- PSL University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| | - Vincent Placet
- FEMTO-ST Institute, CNRS/UFC/ENSMM/UTBM, Department of Applied Mechanics, Université de Bourgogne Franche-Comté, Besançon, France
| | - Christophe M Thomas
- PSL University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| |
Collapse
|
12
|
Djorgbenoo R, Rubio MMM, Yin Z, Moore KJ, Jayapalan A, Fiadorwu J, Collins BE, Velasco B, Allado K, Tsuruta JK, Gorman CB, Wei J, Johnson KA, He P. Amphiphilic phospholipid-iodinated polymer conjugates for bioimaging. Biomater Sci 2021; 9:5045-5056. [PMID: 34127999 DOI: 10.1039/d0bm02098b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Amphiphilic phospholipid-iodinated polymer conjugates were designed and synthesized as new macromolecular probes for a highly radiopaque and biocompatible imaging technology. Bioconjugation of PEG 2000-phospholipids and iodinated polyesters by click chemistry created amphiphilic moieties with hydrophobic polyesters and hydrophilic PEG units, which allowed their self-assemblies into vesicles or spiked vesicles. More importantly, the conjugates exhibited high radiopacity and biocompatibility in in vitro X-ray and cell viability measurements. This new type of bioimaging contrast agent with a Mn value of 11 289 g mol-1 was found to have a significant X-ray signal at 3.13 mg mL-1 of iodine equivalent than baseline and no cytotoxicity after 48 hours incubation of with HEK and 3T3 cells at 20 μM (20 picomoles) concentration of conjugates per well. The potential of adopting the described macromolecular probes for bioimaging was demonstrated, which could further promote the development of a field-friendly and highly sensitive bioimaging contrast agent for point-of-care diagnostic applications.
Collapse
Affiliation(s)
- Richmond Djorgbenoo
- Department of Chemistry, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA.
| | - Mac Michael M Rubio
- Department of Chemistry, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA.
| | - Ziyu Yin
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, USA
| | - Keyori J Moore
- Department of Chemistry, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA.
| | - Anitha Jayapalan
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, USA
| | - Joshua Fiadorwu
- Department of Chemistry, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA.
| | - Boyce E Collins
- Engineering Research Center for Revolutionizing Biomaterials, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA
| | - Brian Velasco
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
| | - Kokougan Allado
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, USA
| | - James K Tsuruta
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
| | - Christopher B Gorman
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, USA
| | - Jianjun Wei
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, USA
| | - Kennita A Johnson
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
| | - Peng He
- Department of Chemistry, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411, USA.
| |
Collapse
|
13
|
Mild and Efficient Tunable Brønsted Acidic Ionic Liquid Catalyzed O-Acetylation and O-Trimethylsilylation with Trimethylsilyl Acetate (TMSOAc) and Hexamethyldisilazane (HMDS). Catalysts 2021. [DOI: 10.3390/catal11070825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This report discloses a mild and efficient O-acetylation using easily accessible TMSOAc as a novel acetyl reagent and O-trimethylsilylation using HMDS for various alcohols catalyzed by tunable Brønsted acidic ionic liquids (TBAILs). Imidazolium-based TBAILs were prepared by a two-step atom-economic reaction and acidities measured by using UV-visible spectroscopy. Both protections for alcohols were accomplished at room temperature with good to excellent yields, while the products and TBAILs were separated by simple work-up for O-silylation and column chromatography for O-acetylation. Notably, with the simple post-process, TBAILs catalyst in this solvent free method easily recovered and recycled several times without significant degradation.
Collapse
|
14
|
Yakovleva MP, Denisova KS, Vydrina VA, Tolstikov AG, Ishmuratov GY. Methods for Macrolactonization of Seco Acids in the Synthesis of Natural and Biologically Active Compounds. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021050018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
15
|
Hayashi H, Yasukochi S, Sakamoto T, Hatano M, Ishihara K. Insight into the Mechanism of the Acylation of Alcohols with Acid Anhydrides Catalyzed by Phosphoric Acid Derivatives. J Org Chem 2021; 86:5197-5212. [PMID: 33720717 DOI: 10.1021/acs.joc.1c00102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Insight into the mechanism of a safe, simple, and inexpensive phosphoric acid (H3PO4)-catalyzed acylation of alcohols with acid anhydrides is described. The corresponding in situ-generated diacylated mixed anhydrides, unlike traditionally proposed monoacylated mixed anhydrides, are proposed as the active species. In particular, the diacylated mixed anhydrides act as efficient catalytic acyl transfer reagents rather than as Brønsted acid catalysts simply activating acid anhydrides. Remarkably, highly efficient phosphoric acid (1-3 mol %)-catalyzed acylation of alcohols with acid anhydrides was achieved and a 23 g scale synthesis of an ester was demonstrated. Also, phosphoric acid catalyst was effective for synthetically useful esterification from carboxylic acids, alcohols, and acid anhydride. Moreover, with regard to recent developments in chiral 1,1'-bi-2-naphthol (BINOL)-derived phosphoric acid diester catalysts toward asymmetric kinetic resolution of alcohols by acylation, some phosphate diesters were examined. As a result, a 31P NMR study and a kinetics study strongly supported not only the acid-base cooperative mechanism as previously proposed by other researchers but also the mixed anhydride mechanism as presently proposed by us.
Collapse
Affiliation(s)
- Hiroyuki Hayashi
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Shotaro Yasukochi
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Tatsuhiro Sakamoto
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Manabu Hatano
- Graduate School of Pharmaceutical Sciences, Kobe Pharmaceutical University, Kobe 658-8558, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| |
Collapse
|
16
|
Challa VR, Kwon D, Taron M, Fan H, Kang B, Wilson D, Haeckl FPJ, Keerthisinghe S, Linington RG, Britton R. Total synthesis of biselide A. Chem Sci 2021; 12:5534-5543. [PMID: 34168790 PMCID: PMC8179649 DOI: 10.1039/d0sc06223e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 02/15/2021] [Indexed: 12/02/2022] Open
Abstract
A total synthesis of the marine macrolide biselide A is described that relies on an enantiomerically enriched α-chloroaldehyde as the sole chiral building block. Several strategies to construct the macrocycle are presented including a macrocyclic Reformatsky reaction that ultimately provides access to the natural product in a longest linear sequence of 18 steps. Biological testing of synthetic biselide A suggests this macrolide disrupts cell division through a mechanism related to the regulation of microtubule cytoskeleton organization. Overall, this concise synthesis and insight gained into the mechanism of action should inspire medicinal chemistry efforts directed at structurally related anticancer marine macrolides.
Collapse
Affiliation(s)
- Venugopal Rao Challa
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Daniel Kwon
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Matthew Taron
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Hope Fan
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Baldip Kang
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Darryl Wilson
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - F P Jake Haeckl
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Sandra Keerthisinghe
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Roger G Linington
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| | - Robert Britton
- Department of Chemistry, Simon Fraser University Burnaby British Columbia V5A 1S6 Canada
| |
Collapse
|
17
|
Methanesulfonic anhydride-promoted sustainable synthesis of thioesters from feedstock acids and thiols. J CHEM SCI 2021. [DOI: 10.1007/s12039-020-01871-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
18
|
Hlatshwayo XS, Ndolomingo MJ, Bingwa N, Meijboom R. Molybdenum-modified mesoporous SiO 2 as an efficient Lewis acid catalyst for the acetylation of alcohols. RSC Adv 2021; 11:16468-16477. [PMID: 35479144 PMCID: PMC9031266 DOI: 10.1039/d1ra02134f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 04/26/2021] [Indexed: 01/30/2023] Open
Abstract
A suitable, expeditious and well-organized approach for the acetylation of alcohols with acetic anhydride in the presence of 5%MoO3–SiO2 as an optimum environmentally benign heterogeneous catalyst was developed.
Collapse
Affiliation(s)
- Xolani S. Hlatshwayo
- Center for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- 2006 Johannesburg
- South Africa
| | - Matumuene Joe Ndolomingo
- Center for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- 2006 Johannesburg
- South Africa
| | - Ndzondelelo Bingwa
- Center for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- 2006 Johannesburg
- South Africa
| | - Reinout Meijboom
- Center for Synthesis and Catalysis
- Department of Chemical Sciences
- University of Johannesburg
- 2006 Johannesburg
- South Africa
| |
Collapse
|
19
|
Zubrytski DM, Elek GZ, Lopp M, Kananovich DG. Generation of Mixed Anhydrides via Oxidative Fragmentation of Tertiary Cyclopropanols with Phenyliodine(III) Dicarboxylates. Molecules 2020; 26:molecules26010140. [PMID: 33396847 PMCID: PMC7794720 DOI: 10.3390/molecules26010140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/24/2020] [Accepted: 12/26/2020] [Indexed: 11/20/2022] Open
Abstract
Oxidative fragmentation of tertiary cyclopropanols with phenyliodine(III) dicarboxylates in aprotic solvents (dichloromethane, chloroform, toluene) produces mixed anhydrides. The fragmentation reaction is especially facile with phenyliodine(III) reagents bearing electron-withdrawing carboxylate ligands (trifluoroacetyl, 2,4,6-trichlorobenzoyl, 3-nitrobenzoyl), and affords 95−98% yields of the corresponding mixed anhydride products. The latter can be straightforwardly applied for the acylation of various nitrogen, oxygen and sulfur-centered nucleophiles (primary and secondary amines, hydroxylamines, primary alcohols, phenols, thiols). Intramolecular acylation yielding macrocyclic lactones can also be performed. The developed transformation has bolstered the synthetic utility of cyclopropanols as pluripotent intermediates in diversity-oriented synthesis of bioactive natural products and their synthetic congeners. For example, it was successfully applied for the last-stage modification of a cyclic peptide to produce a precursor of a known histone deacetylase inhibitor.
Collapse
Affiliation(s)
- Dzmitry M. Zubrytski
- Department of Organic Chemistry, Belarusian State University, Leningradskaya 14, 220050 Minsk, Belarus;
| | - Gábor Zoltán Elek
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia; (G.Z.E.); (M.L.)
| | - Margus Lopp
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia; (G.Z.E.); (M.L.)
| | - Dzmitry G. Kananovich
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia; (G.Z.E.); (M.L.)
- Correspondence: ; Tel.: +372-6204382
| |
Collapse
|
20
|
Chaubey SA, Mishra R. Synthesis of task-specific imidazolium ionic liquid as an efficient catalyst in acetylation of alcohols, phenols, and amines. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01150-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
21
|
Figueroa L, Garcimarero A, Garcia R, Diaz F, Rosas M, Mateu V, Lopez M, Hau L, Lopez T, Camacho A, Borges Y. Design and Synthesis of Two Bicyclo[3.3.1]nonane-steroid Derivatives. CHEMISTRY JOURNAL OF MOLDOVA 2020. [DOI: 10.19261/cjm.2019.657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
22
|
Sun X, Su W, Shi K, Xie Z, Zhu C. Triple Frustrated Lewis Pair-Type Reactivity on a Single Rare-Earth Metal Center. Chemistry 2020; 26:5354-5359. [PMID: 31950533 DOI: 10.1002/chem.201905629] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Indexed: 12/28/2022]
Abstract
Rare-earth metal cations have been used rarely as Lewis-acidic components in the chemistry of frustrated Lewis pairs (FLPs). Herein, we report the first cerium/phosphorus system (2) employing a heptadentate N4 P3 ligand, which exhibits triple FLP-type reactivity towards a series of organic substrates, including isocyanates, isothiocyanates, diazomethane, and azides on a single rare-earth Lewis acidic Ce center. This result shows that the Ce center and three P atoms in 2 could simultaneously activate three equivalents of small molecules under mild conditions. This study broadens the diversity of FLPs and demonstrates that rare earth based FLP exhibit unique properties compared with other FLP systems.
Collapse
Affiliation(s)
- Xiong Sun
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Wei Su
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Kaiying Shi
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Zhuoyi Xie
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Congqing Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China
| |
Collapse
|
23
|
Affiliation(s)
- Ming Yang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
| | - Xuewei Wang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
| | - Junfeng Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, Jiangxi P. R. China
- School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, Guangdong P. R. China
| |
Collapse
|
24
|
Banerjee B, Bhardwaj V, Kaur A, Kaur G, Singh A. Catalytic Applications of Saccharin and its Derivatives in Organic Synthesis. CURR ORG CHEM 2020. [DOI: 10.2174/1385272823666191121144758] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
:
Saccharin (1,2-benzisothiazol-3(2H)-one-1,1-dioxide) is a very mild, cheap,
commercially available, water soluble, environmentally benign and edible Brønsted acidic
substance. Recently, with other utilities, saccharin and its derivatives were employed as
catalysts for various organic transformations. In this review, catalytic applicability of saccharin
and its derivatives under various reaction conditions is summarized.
Collapse
Affiliation(s)
- Bubun Banerjee
- Department of Chemistry, Indus International University, Village and Post Office Bathu, District Una, Himachal Pradesh 174301, India
| | - Vaishali Bhardwaj
- Department of Chemistry, Indus International University, Village and Post Office Bathu, District Una, Himachal Pradesh 174301, India
| | - Amninder Kaur
- Department of Chemistry, Indus International University, Village and Post Office Bathu, District Una, Himachal Pradesh 174301, India
| | - Gurpreet Kaur
- Department of Chemistry, Indus International University, Village and Post Office Bathu, District Una, Himachal Pradesh 174301, India
| | - Arvind Singh
- Department of Chemistry, Indus International University, Village and Post Office Bathu, District Una, Himachal Pradesh 174301, India
| |
Collapse
|
25
|
Takeuchi S, Takasu A. Facile rare-earth triflate-catalyzed esterification of cellulose by carboxylic anhydrides under solvent-free conditions. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
26
|
Pinet A, Figadère B, Ferrié L. Access to Functionalized 3,5‐Disubstituted 1,2‐Dioxolanes under Mild Conditions through Indium(III) Chloride/Trimethylsilyl Chloride or Scandium(III) Triflate Catalysis. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901145] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Alexis Pinet
- BioCIS, Université Paris-Sud, CNRSUniversité Paris-Saclay Châtenay-Malabry 92290 France
| | - Bruno Figadère
- BioCIS, Université Paris-Sud, CNRSUniversité Paris-Saclay Châtenay-Malabry 92290 France
| | - Laurent Ferrié
- BioCIS, Université Paris-Sud, CNRSUniversité Paris-Saclay Châtenay-Malabry 92290 France
| |
Collapse
|
27
|
Kaboudin B, Alavi S, Kazemi F, Aoyama H, Yokomatsu T. Resolution of Racemic α-Hydroxyphosphonates: Bi(OTf) 3-Catalyzed Stereoselective Esterification of α-Hydroxyphosphonates with (+)-Dibenzoyl-l-tartaric Anhydride. ACS OMEGA 2019; 4:15471-15478. [PMID: 31572847 PMCID: PMC6761612 DOI: 10.1021/acsomega.9b01722] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/29/2019] [Indexed: 06/10/2023]
Abstract
A practical and efficient method has been developed for the preparation of optically active α-hydroxyphosphonates through resolution of the racemates. Treatment of racemic diethyl 1-hydroxy-1-phenylmethylphosphonate (1) with (+)-dibenzoyl-L-tartaric anhydride gave two diastereomeric esters 2 and 3 in the presence of bismuth triflate (15 mol %) in an 86:14 ratio. The two diastereomeric esters were separated by simple column chromatography, and the structure for the major diastereomer was determined by X-ray crystallographic analysis. Simple hydrolysis of the isolated major diastereomer in the usual manner afforded (R)-O,O-diethyl-1-[hydroxyl(phenyl)methyl] phosphonate 1. The advantages of the present method are that the operation is simple and easy to handle, along with rapid and good yield preparations of both enantiomers of the racemic α-phosphonates 1. Diastereoselective reactions of various racemic α-hydroxyphosphonates with d-Bz-L-TA in the presence of Bi(OTf)3 are also described.
Collapse
Affiliation(s)
- Babak Kaboudin
- Department
of Chemistry, Institute for Advanced Studies
in Basic Sciences (IASBS), Gava Zang, Zanjan 45137-66731, Iran
| | - Sajedeh Alavi
- Department
of Chemistry, Institute for Advanced Studies
in Basic Sciences (IASBS), Gava Zang, Zanjan 45137-66731, Iran
| | - Foad Kazemi
- Department
of Chemistry, Institute for Advanced Studies
in Basic Sciences (IASBS), Gava Zang, Zanjan 45137-66731, Iran
| | - Hiroshi Aoyama
- School
of Pharmacy, Tokyo University of Pharmacy
and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Tsutomu Yokomatsu
- School
of Pharmacy, Tokyo University of Pharmacy
and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| |
Collapse
|
28
|
Wu J, Kadonaga Y, Hong B, Wang J, Lei X. Enantioselective Total Synthesis of (+)‐Jungermatrobrunin A. Angew Chem Int Ed Engl 2019; 58:10879-10883. [DOI: 10.1002/anie.201903682] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Indexed: 02/02/2023]
Affiliation(s)
- Jinbao Wu
- School of Pharmaceutical Science and TechnologyTianjin University Tianjin 300072 China
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Yuichiro Kadonaga
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Benke Hong
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Jin Wang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| |
Collapse
|
29
|
Abstract
In the present study, an easy and an efficient approach is reported for the acetylation of alcohols, amines, phenols, and thiols under solvent- and catalyst-free conditions. The experimental conditions were milder than conventional methods and the reactions were completed in shorter reaction time. The examined substrates afforded higher yields of the acetylated products under the short reaction time. Comparison of this work with earlier reported procedures reveals that this method offers some advantages than with reported catalysts and solvents. The as-synthesized products were characterized by 1H-NMR and GC-MS techniques to ensure their purity and identity. In addition, a possible mechanism was also proposed for this reaction.
Collapse
|
30
|
Wu J, Kadonaga Y, Hong B, Wang J, Lei X. Enantioselective Total Synthesis of (+)‐Jungermatrobrunin A. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903682] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jinbao Wu
- School of Pharmaceutical Science and TechnologyTianjin University Tianjin 300072 China
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Yuichiro Kadonaga
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Benke Hong
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Jin Wang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| | - Xiaoguang Lei
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of EducationDepartment of Chemical BiologyCollege of Chemistry and Molecular EngineeringSynthetic and Functional Biomolecules Center and Peking-Tsinghua Center for Life SciencesPeking University Beijing 100871 China
| |
Collapse
|
31
|
Replacement of Chromium by Non-Toxic Metals in Lewis-Acid MOFs: Assessment of Stability as Glucose Conversion Catalysts. Catalysts 2019. [DOI: 10.3390/catal9050437] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The metal–organic framework MIL-101(Cr) is known as a solid–acid catalyst for the solution conversion of biomass-derived glucose to 5-hydroxymethyl furfural (5-HMF). We study the substitution of Cr3+ by Fe3+ and Sc3+ in the MIL-101 structure in order to prepare more environmentally benign catalysts. MIL-101(Fe) can be prepared, and the inclusion of Sc is possible at low levels (10% of Fe replaced). On extended synthesis times the polymorphic MIL-88B structure instead forms.Increasing the amount of Sc also only yields MIL-88B, even at short crystallisation times. The MIL-88B structure is unstable under hydrothermal conditions, but in dimethylsulfoxide solvent, it provides 5-HMF from glucose as the major product. The optimum material is a bimetallic (Fe,Sc) form of MIL-88B, which provides ~70% conversion of glucose with 35% selectivity towards 5-HMF after 3 hours at 140 °C: this offers high conversion compared to other heterogeneous catalysts reported in the same solvent.
Collapse
|
32
|
Jin TS, Xiao JC, Wang ZH, Li TS. Silica Gel-Supported Phosphotungstic Acid (PTA) Catalysed Acylation of Alcohols and Phenols with Acetic Anhydride under Mild Reaction Conditions. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823403103174335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Phosphotungstic acid, which is commercially available, practically and efficiently catalyses the acylation of a series of alcohols and phenols with acetic anhydride at room temperature or at refluxing temperature.
Collapse
Affiliation(s)
- Tong-Shou Jin
- Department of Chemistry, Hebei University, Baoding 071002, Hebei Province, P. R. China
| | - Jin-Chong Xiao
- Department of Chemistry, Hebei University, Baoding 071002, Hebei Province, P. R. China
| | - Zhen-Hua Wang
- Department of Chemistry, Hebei University, Baoding 071002, Hebei Province, P. R. China
| | - Tong-Shuang Li
- Department of Chemistry, Hebei University, Baoding 071002, Hebei Province, P. R. China
| |
Collapse
|
33
|
Mohammadpoor-Baltork I, Khosropour AR, Aliyan H. A Convenient and Chemoselective Acetylation and Formylation of Alcohols and Phenols Using Acetic Acid and Ethyl Formate in the Presence of Bi(III) Salts. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823401103169775] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A variety of alcohols are acetylated and formylated efficiently with acetic acid and ethyl formate in the presence of catalytic amounts of Bi(III) salts such as BiCl3, Bi(TFA)3 and Bi(OTf)3. BiCl3 and Bi(OTf)3 are also effective catalysts for acetylation of phenols. All of these catalysts are ineffective in formylation of phenols. Selective acetylation and formylation of alcohols in the presence of phenols is an additional advantage of this procedure.
Collapse
Affiliation(s)
| | | | - Hamid Aliyan
- Department of Chemistry, Isfahan University, Isfahan 81744, Iran
| |
Collapse
|
34
|
Eshghi H, Shafieyoon P. P2O5 / SiO2 as a mild and efficient reagent for acylation of alcohols, phenols and amines under solvent-free conditions. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/0308234043431267] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
P2O5 / SiO2 is a highly efficient reagent for the acetylations of a variety of alcohols, phenols and amines with acetic anhydride under solvent-free conditions. Primary, secondary, allylic and benzylic alcohols, diols and phenols with electron-donating or withdrawing substituents can be easily acetylated in good to excellent yield.
Collapse
Affiliation(s)
- Hossein Eshghi
- Department of Chemistry, Ferdowsi University of Mashhad, Mashhad 91775-1436, Iran
- Department of Chemistry, Sistan and Baluchestan University, Zahedan 98135, Iran
| | - Parvaneh Shafieyoon
- Department of Chemistry, Sistan and Baluchestan University, Zahedan 98135, Iran
| |
Collapse
|
35
|
Shekarriz M, Taghipoor S, Khalili AA, Jamarani MS. Esterification of Carboxylic Acids with Alcohols under Microwave Irradiation in the presence of Zinc Triflate. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823403103173381] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The esterification of aliphatic and aromatic carboxylic acids with various alcohols (1°, 2°, 3°, benzylic) was studied under microwave irradiation in the presence of zinc triflate as catalyst; the reaction times were short and the yield of reactions was good to excellent.
Collapse
Affiliation(s)
- Marzieh Shekarriz
- Additive department, Chemistry and Petrochemical Division, Research Institute of Petroleum Industry, Qom Road, PO Box: 18745-4163, Tehran, Iran
| | - Sohrab Taghipoor
- Additive department, Chemistry and Petrochemical Division, Research Institute of Petroleum Industry, Qom Road, PO Box: 18745-4163, Tehran, Iran
| | - Ali Asghar Khalili
- Additive department, Chemistry and Petrochemical Division, Research Institute of Petroleum Industry, Qom Road, PO Box: 18745-4163, Tehran, Iran
| | - Mohammad Soleymani Jamarani
- Additive department, Chemistry and Petrochemical Division, Research Institute of Petroleum Industry, Qom Road, PO Box: 18745-4163, Tehran, Iran
| |
Collapse
|
36
|
Jin TS, Li YW, Sun G, Li TS. TiO2/SO42-, A Convenient and Efficient Catalyst for Desilylation-Acetylation of Trimethylsilyl Ethers with Acetic Anhydride. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823403103173093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A rapid method for desilylation-acetylation of trimethylsilyl ethers with acetic anhydride catalysed by TiO2/SO42- at room temperature is reported.
Collapse
Affiliation(s)
- Tong-Shou Jin
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
| | - Yan-Wei Li
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
| | - Guang Sun
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
| | - Tong-Shuang Li
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
| |
Collapse
|
37
|
Shirini F, Zolfigol MA, Safari A. Efficient Acetylation and Formylation of Alcohols in the Presence of Zr(Hso4)4. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823406776330819] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Acetylation and formylation of alcohols with acetic and formic acids have been carried out in the presence of catalytic amounts of Zr(HSO4)4 under mild and heterogeneous conditions.
Collapse
Affiliation(s)
- Farhad Shirini
- Department of Chemistry, College of Science, Guilan University, Rasht, zip code 41335, I.R. Iran
| | - M. A. Zolfigol
- Department of Chemistry, College of Science, Bu-Ali Sina University, Hamadan, zip code 65174, I.R. Iran
| | - A. Safari
- Department of Chemistry, College of Science, Guilan University, Rasht, zip code 41335, I.R. Iran
| |
Collapse
|
38
|
Horiuchi CA, Fukushima T, Furuta N, Chai W, Ji SJ, Saito Y, Hashimoto C, Takahashi TT, Sugiyama T, Muto A, Sakata Y, Nozaki S. Esterification of Alkene with Cerium(IV) Sulfate in Carboxylic Acid. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823403103173769] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Reaction of alkenes [cyclohexene (1), cycloheptene (2), cyclooctene (3), 1-heptene (4), 1-octene (5), styrene (6), 1,7-octadiene (7), indene (8), and 1,2-dihydronaphthalene (9)] with cerium(IV) sulfate (CS) in carboxylic acids [formic acid, acetic acid, and propionic acid] readily yielded the corresponding carboxylic esters. This addition reaction follows the Markovnikov rule. This reaction provides a new simple method for preparing carboxylic esters from alkenes. It was also found that this method is useful for formylation.
Collapse
Affiliation(s)
- C. Akira Horiuchi
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Tomoaki Fukushima
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Noriyuki Furuta
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Wen Chai
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Shun-Jun Ji
- Department of Chemistry, Suzhou University, 1 Shizi St. Suzhou, Jiangsu 215006, P. R. China
| | - Yoshikazu Saito
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Chikao Hashimoto
- Department of Chemistry, Jikei University, School of Medicine, Kokuryo-cho, Chofu-shi, Tokyo 182-8570, Japan
| | - T. Tomoyoshi Takahashi
- Department of Chemistry, Jikei University, School of Medicine, Kokuryo-cho, Chofu-shi, Tokyo 182-8570, Japan
| | - Takashi Sugiyama
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Akinori Muto
- Department of Applied Chemistry, Okayama University, Faculty of Engineering, Tsushima Naka, Okayama City, Okayama 700-8530, Japan
| | - Yusaku Sakata
- Department of Applied Chemistry, Okayama University, Faculty of Engineering, Tsushima Naka, Okayama City, Okayama 700-8530, Japan
| | - Sukekatsu Nozaki
- Faculty of Pharmaceutical Science, Josai University, Sakado, Saitama 350-0295, Japan
| |
Collapse
|
39
|
Movassagh B, Lakouraj MM, Fasihi J. Desilylation-acetylation of Trimethylsilyl Ethers with Acetic Anhydride Catalysed by Montmorillonite K-10. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823400103167598] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two mild and simple one-step desilylation-acetylations of a variety of alkyl- and aryl-trimethylsilyl ethers, Me3SiOR(Ar), with acetic anhydride in the presence of montmorillonite K-10 clay are described.
Collapse
Affiliation(s)
| | | | - Jalal Fasihi
- Department of Chemistry, Razi University, Kermanshah 67149, Iran
| |
Collapse
|
40
|
Abstract
Plants in the Schisandraceae family are important components of the traditional Chinese herbal medicines and are often used to treat various illnesses. Therefore, these Schisandraceae plants are valuable sources for the discovery of new chemical entities for novel therapeutic development. Considerable progress has been made in the identification of bioactive and structurally novel triterpenoids from the Schisandraceae family in the past two decades. In particular, Sun and co-workers have successfully isolated over 100 nortriterpenoids from the Schisandraceae family. Some of these nortriterpenoids have strong inhibitory activities toward hepatitis, tumors, and HIV-1. However, the natural scarcity of these nortriterpenoids in the Schisandraceae plants has hampered their isolation and further biomedical development, and their biosynthesis has not been fully elucidated. It is therefore important and urgent to develop efficient and streamlined total syntheses of these medicinally important nortriterpenoids. Such syntheses will provide sufficient materials for detailed biological studies as well as new synthetic analogues and probe molecules to improve their biological functions and elucidate their mode of actions. However, because of their structural novelty and complexity, the total syntheses of these nortriterpenoid natural products present a significant challenge for synthetic chemists, despite the progress made in organic synthesis, particularly total synthesis, in the 20th century and since the beginning of the 21st century. New synthetic methodologies and strategies therefore need to be invented and developed to facilitate the total syntheses of these nortriterpenoid natural products. With this in mind, our group has spent the last 15 years, ever since the isolation of micrandilactone A (1) by Sun and co-workers in 2003 ( Sun et al. Org. Lett. 2003 , 5 , 1023 - 1026 ), working on synthetic studies with a view to developing methods and strategies for the total syntheses of schinortriterpenoids. Enabling methods such as a thiourea/Pd-catalyzed alkocycarbonylative annulation and a thiourea/Co-catalyzed Pauson-Khand reaction have been developed under these circumstances to form the key ring systems and stereocenters of these complex target molecules. These methodological advances have led us to the first total syntheses of schindilactone A (2), lancifodilactone G acetate (6a), 19-dehydroxyarisandilactone A (9), and propindilactone G (10) with diverse structural features via a branching-oriented strategy. The chemistry developed during our total synthesis campaign has not only helped us to deal with various challenges encountered in the syntheses of the four target molecules, but has also opened up new avenues for synthesizing other naturally occurring schinortriterpenoids and their derivatives, which will likely result in molecules with improved biological functions and tool compounds to enable elucidation of their mechanism of actions or potential cellular targets. This Account highlights the chemistry evolution of our schinortriterpenoid syntheses.
Collapse
Affiliation(s)
- Zhen Yang
- Beijing National Laboratory for Molecular Science and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of the Ministry of Education, College of Chemistry and Molecular Engineering and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
- State Key Laboratory of Chemical Oncogenomics and Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| |
Collapse
|
41
|
Takagi R, Fujii E, Kondo H. Enantioselective Michael Reaction of Cyclic β-Ketoesters with Morita-Baylis-Hillman Derivatives Using a Phase-Transfer Catalyst. J Org Chem 2018; 83:11191-11203. [PMID: 30130106 DOI: 10.1021/acs.joc.8b01777] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
This study aims to develop a highly enantioselective Michael reaction of cyclic β-ketoesters with Morita-Baylis-Hillman (MBH) derivatives using a phase-transfer catalyst. Cyclic β-ketoesters reacted with MBH derivatives to stereoselectively generate a quaternary carbon center in the presence of cinchona alkaloid-derived bulky ammonium catalyst, and aqueous KOH and Michael adducts bearing an acrylate moiety were obtained in good chemical yields with good enantioselectivity.
Collapse
Affiliation(s)
- Ryukichi Takagi
- Department of Chemistry, Graduate School of Science , Hiroshima University , 1-3-1 Kagamiyama , Higashi-Hiroshima 739-8526 , Japan
| | - Emi Fujii
- Department of Chemistry, Graduate School of Science , Hiroshima University , 1-3-1 Kagamiyama , Higashi-Hiroshima 739-8526 , Japan
| | - Hirotoshi Kondo
- Department of Chemistry, Graduate School of Science , Hiroshima University , 1-3-1 Kagamiyama , Higashi-Hiroshima 739-8526 , Japan
| |
Collapse
|
42
|
Gilanizadeh M, Zeynizadeh B, Gholamiyan E. Green Formylation of Alcohols Catalyzed by Magnetic Nanoparticles of the Core–Shell Fe3O4@SiO2-SO3H. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY, TRANSACTIONS A: SCIENCE 2018. [DOI: 10.1007/s40995-018-0594-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
43
|
Mandler MD, Baidin V, Lee J, Pahil KS, Owens TW, Kahne D. Novobiocin Enhances Polymyxin Activity by Stimulating Lipopolysaccharide Transport. J Am Chem Soc 2018; 140:6749-6753. [PMID: 29746111 PMCID: PMC5990483 DOI: 10.1021/jacs.8b02283] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Gram-negative bacteria are challenging to kill with antibiotics due to their impenetrable outer membrane containing lipopolysaccharide (LPS). The polymyxins, including colistin, are the drugs of last resort for treating Gram-negative infections. These drugs bind LPS and disrupt the outer membrane; however, their toxicity limits their usefulness. Polymyxin has been shown to synergize with many antibiotics including novobiocin, which inhibits DNA gyrase, by facilitating transport of these antibiotics across the outer membrane. Recently, we have shown that novobiocin not only inhibits DNA gyrase but also binds and stimulates LptB, the ATPase that powers LPS transport. Here, we report the synthesis of novobiocin derivatives that separate these two activities. One analog retains LptB-stimulatory activity but is unable to inhibit DNA gyrase. This analog, which is not toxic on its own, nevertheless enhances the lethality of polymyxin by binding LptB and stimulating LPS transport. Therefore, LPS transport agonism contributes substantially to novobiocin-polymyxin synergy. We also report other novobiocin analogs that inhibit DNA gyrase better than or equal to novobiocin, but bind better to LptB and therefore have even greater LptB stimulatory activity. These compounds are more potent than novobiocin when used in combination with polymyxin. Novobiocin analogs optimized for both gyrase inhibition and LPS transport agonism may allow the use of lower doses of polymyxin, increasing its efficacy and safety.
Collapse
Affiliation(s)
- Michael D Mandler
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Vadim Baidin
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - James Lee
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Karanbir S Pahil
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Tristan W Owens
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Daniel Kahne
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| |
Collapse
|
44
|
Hafnium inspired activation of highly hindered anhydrides in the acylation of alcohols and polyols. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
45
|
Shi L, Liu H, Huo L, Dang Y, Wang Y, Yang B, Qiu S, Tan H. Site-selective phenol acylation mediated by thioacids via visible light photoredox catalysis. Org Chem Front 2018. [DOI: 10.1039/c8qo00041g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Site-selective phenol acylation mediated by thioacids via photoredox catalysis is described. This protocol provided facile access to an array of phenolic esters with exclusive acylation priority of phenol hydroxyl group to alcoholic one. Its utility was also demonstrated by the modification of biologically meaningful natural product.
Collapse
Affiliation(s)
- Lili Shi
- Department of Chemistry
- Changzhi University
- Changzhi 046000
- China
| | - Hongxin Liu
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangzhou 510070
| | - Luqiong Huo
- Department of Chemistry
- Changzhi University
- Changzhi 046000
- China
- Program for Natural Product Chemical Biology
| | - Yaqian Dang
- Program for Natural Product Chemical Biology
- Key Laboratory Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Yu Wang
- Program for Natural Product Chemical Biology
- Key Laboratory Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Bao Yang
- Program for Natural Product Chemical Biology
- Key Laboratory Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Shengxiang Qiu
- Program for Natural Product Chemical Biology
- Key Laboratory Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| | - Haibo Tan
- Program for Natural Product Chemical Biology
- Key Laboratory Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
| |
Collapse
|
46
|
Ziaee F, Gholizadeh M, Seyedi SM. Uniformly dispersed copper nanoparticles onto the modified magnetically recoverable nanocatalyst for aqueous synthesis of primary amides. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3925] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Fariborz Ziaee
- Department of Chemistry; Faculty of Science, Ferdowsi University of Mashhad; Mashhad 91775-1436 I.R. Iran
| | - Mostafa Gholizadeh
- Department of Chemistry; Faculty of Science, Ferdowsi University of Mashhad; Mashhad 91775-1436 I.R. Iran
| | - Seyed Mohammad Seyedi
- Department of Chemistry; Faculty of Science, Ferdowsi University of Mashhad; Mashhad 91775-1436 I.R. Iran
| |
Collapse
|
47
|
Trabelsi I, Essid K, Frikha MH. Esterification of Mixed Carboxylic-fatty Anhydrides Using Amberlyst-15 as Heterogeneous Catalyst. J Oleo Sci 2017; 66:667-676. [PMID: 28674327 DOI: 10.5650/jos.ess17008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The article deals with the use of mixed anhydrides for the synthesis of fatty esters. Both aliphatic and aromatic acids are involved, indicating different behaviors according to the chain length of the aliphatic acid. We describe a novel and efficient method for the synthesis of fatty esters by the esterification reaction of primary, secondary and tertiary alcohols with mixed carboxylic-palmitic anhydrides using resin Amberlyst-15 as heterogeneous acid catalyst. Influence of various reaction parameters such as molar ratio (anhydride/alcohol), catalyst amount, type of alcohol and type of mixed anhydride were studied to optimize the conditions for maximum yield. Among tested anhydrides we quote mainly the 4-chlorobenzoic palmitic anhydride because it was both reactive and selective for the preparation of palmitic acid ester. This anhydride gave a good yield of palmitic ester.
Collapse
Affiliation(s)
- Iteb Trabelsi
- Laboratory of Physical and Organic Chemistry: Department of Chemistry, Faculty of Sciences in Sfax
| | - Kamel Essid
- Laboratory of Physical and Organic Chemistry: Department of Chemistry, Faculty of Sciences in Sfax
| | - Mohamed Hedi Frikha
- Laboratory of Physical and Organic Chemistry: Department of Chemistry, Faculty of Sciences in Sfax
| |
Collapse
|
48
|
Cheng H, Zhang Z, Yao H, Zhang W, Yu J, Tong R. Unified Asymmetric Total Syntheses of (−)-Alotaketals A-D and (−)-Phorbaketal A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704628] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hang Cheng
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Zhihong Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Hongliang Yao
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Wei Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Jingxun Yu
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Rongbiao Tong
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| |
Collapse
|
49
|
Cheng H, Zhang Z, Yao H, Zhang W, Yu J, Tong R. Unified Asymmetric Total Syntheses of (−)-Alotaketals A-D and (−)-Phorbaketal A. Angew Chem Int Ed Engl 2017; 56:9096-9100. [DOI: 10.1002/anie.201704628] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Hang Cheng
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Zhihong Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Hongliang Yao
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Wei Zhang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Jingxun Yu
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| | - Rongbiao Tong
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay Kowloon HK China
| |
Collapse
|
50
|
Sau P, Santra SK, Rakshit A, Patel BK. tert-Butyl Nitrite-Mediated Domino Synthesis of Isoxazolines and Isoxazoles from Terminal Aryl Alkenes and Alkynes. J Org Chem 2017; 82:6358-6365. [DOI: 10.1021/acs.joc.7b00946] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Prasenjit Sau
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Sourav Kumar Santra
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Bhisma K. Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| |
Collapse
|