1
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Mendas I, Gastaldi S, Suppo JS. Strategies for Accessing cis-1-Amino-2-Indanol. Molecules 2024; 29:2442. [PMID: 38893318 PMCID: PMC11173559 DOI: 10.3390/molecules29112442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 06/21/2024] Open
Abstract
cis-1-amino-2-indanol is an important building block in many areas of chemistry. Indeed, this molecule is currently used as skeleton in many ligands (BOX, PyBOX…), catalysts and chiral auxiliaries. Moreover, it has been incorporated in numerous bioactive structures. The major issues during its synthesis are the control of cis-selectivity, for which various strategies have been devised, and the enantioselectivity of the reaction. This review highlights the various methodologies implemented over the last few decades to access cis-1-amino-2-indanol in racemic and enantioselective manners. In addition, the various substitution patterns on the aromatic ring and their preparations are listed.
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2
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Crossley P, Sutar Y, Tsoy I, Mukkirwar S, Łaniewski P, Herbst-Kralovetz MM, Date AA. Development of phenyllactic acid ionic liquids and evaluation of cytotoxicity to human cervical epithelial cells. RSC Adv 2024; 14:16083-16092. [PMID: 38765482 PMCID: PMC11100303 DOI: 10.1039/d4ra01812e] [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: 03/09/2024] [Accepted: 04/24/2024] [Indexed: 05/22/2024] Open
Abstract
Phenyllactic acid (PLA), is a naturally produced, broad-spectrum antimicrobial compound with activity against bacteria and fungi. PLA can be produced by a variety of lactic acid bacteria, including vaginal Lactobacillus species, which are healthy constituents of the vaginal microbiome with a protective role against invading pathogenic bacteria and/or fungi. Additionally, PLA has been shown to exhibit anti-inflammatory and immunomodulatory properties, overall indicating its therapeutic potential as an intravaginally delivered compound for modulation of the vaginal microbiome. However, PLA has low kinetic solubility in water. Hence, strategies to improve the solubility of PLA are necessary to facilitate its intravaginal delivery. Using biocompatible cations, choline and carnitine, we successfully transformed both d- and l-enantiomers of crystalline PLA into amorphous low-melting ionic liquids (ILs) with high water solubility. We further evaluated the in vitro cytotoxicity of PLA ILs to human cervical epithelial cells. Microscopic visualisation of cellular morphology using crystal violet staining and MTT cell proliferation assay revealed that PLA ILs result in minimal morphological changes and low cytotoxicity to human cervical epithelial cells. Overall, we successfully demonstrated that transforming PLA into ILs efficiently enhances its solubility in water and these formulations are not toxic to human epithelial cells. This investigation lays the groundwork for future testing of PLA ILs for their antimicrobial properties and metabolic activity within the cervicovaginal microenvironment.
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Affiliation(s)
- Phoebe Crossley
- Department of Life Sciences, University of Bath Bath UK
- Department of Obstetrics and Gynecology, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
| | - Yogesh Sutar
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
| | - Irina Tsoy
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
| | - Srushti Mukkirwar
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
| | - Paweł Łaniewski
- Department of Basic Medical Sciences, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
| | - Melissa M Herbst-Kralovetz
- Department of Basic Medical Sciences, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
- Department of Obstetrics and Gynecology, College of Medicine - Phoenix, University of Arizona Phoenix AZ USA
- University of Arizona Cancer Center, University of Arizona Tucson AZ USA
| | - Abhijit A Date
- Department of Pharmacology and Toxicology, R. Ken Coit College of Pharmacy, University of Arizona Tucson AZ USA
- University of Arizona Cancer Center, University of Arizona Tucson AZ USA
- Department of Ophthalmology and Visual Sciences, University of Arizona College of Medicine Tucson AZ USA
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3
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Wu H, Guang C, Zhang W, Mu W. Recent development of phenyllactic acid: physicochemical properties, biotechnological production strategies and applications. Crit Rev Biotechnol 2023; 43:293-308. [PMID: 34965820 DOI: 10.1080/07388551.2021.2010645] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Phenyllactic acid (PLA) is capable of inhibiting the growth of many microorganisms, showing a broad-spectrum antimicrobial property, which allows it to hold vast applications in the: food, feed, pharmaceutical, and cosmetic industries, especially in the field of food safety. Recently, the production of PLA has garnered considerable attention due to the increasing awareness of food safety from the public. Accordingly, this review mainly updates the recent development for the production of PLA through microbial fermentation and whole-cell catalysis (expression single-, double-, and triple-enzyme) strategies. Firstly, the: physicochemical properties, existing sources, and measurement methods of PLA are systematically covered. Then, the inhibition spectrum of PLA is summarized, and synchronously, the antimicrobial and anti-biofilm mechanisms of PLA on commonly pathogenic microorganisms in foods are described in detail, thereby clarifying the reason for extending the shelf life of foods. Additionally, the factors affecting the production of PLA are summarized from the biosynthesis and catabolism pathway of PLA in microorganisms, as well as external environmental parameters insights. Finally, the downstream treatment process and applications of PLA are discussed and outlined. In the future, clinical data should be supplemented with the metabolic kinetics of PLA in humans and to evaluate animal toxicology, to enable regulatory use of PLA as a food additive. A food-grade host, such as Bacillus subtilis and Lactococcus lactis, should also be developed as a cell vector expressing enzymes for PLA production from a food safety perspective.
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Affiliation(s)
- Hao Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.,School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha 410114, China
| | - Cuie Guang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
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4
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Stereochemistry of Chiral 2-Substituted Chromanes: Twist of the Dihydropyran Ring and Specific Optical Rotation. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28010439. [PMID: 36615631 PMCID: PMC9823451 DOI: 10.3390/molecules28010439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 12/27/2022] [Accepted: 12/28/2022] [Indexed: 01/06/2023]
Abstract
Chiral 2-substituted chromanes are important substructures in organic synthesis and appear in numerous natural products. Herein, the correlation between specific optical rotations (SORs) and the stereochemistry at C2 of chiral 2-substituted chromanes was investigated through data mining, quantum-chemical calculations using density functional theory (DFT), and mechanistic analyses. For 2-aliphatic (including acyloxy and alkenyl) chromanes, the P-helicity of the dihydropyran ring usually corresponds to a positive SOR; however, 2-aryl chromanes with P-helicity tend to exhibit negative SORs. 2-Carboxyl (including alkoxycarbonyl and carbonyl) chromanes often display small experimental SORs, and theoretical calculations for them are prone to error because of the fluctuating conformational distribution with computational parameters. Several typical compounds were discussed, including detailed descriptions of the asymmetric synthesis, absolute configuration (AC) assignment methods, and systematic conformational analysis. We hope this work will enrich the knowledge of the stereochemistry of chiral 2-substituted chromanes.
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5
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Metabolomic Characteristics of Liver and Cecum Contents in High-Fat-Diet-Induced Obese Mice Intervened with Lactobacillus plantarum FRT10. Foods 2022; 11:foods11162491. [PMID: 36010491 PMCID: PMC9407591 DOI: 10.3390/foods11162491] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/08/2022] [Accepted: 08/16/2022] [Indexed: 11/23/2022] Open
Abstract
Obesity has become a major social problem related to health and quality of life. Our previous work demonstrated that Lactobacillus plantarum FRT10 alleviated obesity in high-fat diet (HFD)-fed mice by alleviating gut dysbiosis. However, the underlying functions of FRT10 in regulating liver and cecum contents metabolism remain unknown. Liver and cecum contents metabonomics combined with pathway analysis based on ultraperformance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UHPLC-Q-TOF/MS) were performed to evaluate the alterations of metabolic profiles between obese control mice and obese mice in FRT10-treated groups. The orthogonal partial least squares discriminant analysis (OPLS-DA) score plots showed that there were significant differences in cecum contents and liver markers between experimental groups. In total, 26 potential biomarkers were identified in the liver and 15 in cecum contents that could explain the effect of FRT10 addition in HFD-fed mice. In addition, gut–liver axis analysis indicated that there was a strong correlation between cecum contents metabolites and hepatic metabolites. The mechanism of FRT10 against obesity might be related to the alterations in glycerophospholipid metabolism, primary bile acid biosynthesis, amino metabolism, and purine and pyrimidine metabolism. Studies on these metabolites could help us better understand the role of FRT10 in obesity induced by HFD.
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6
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Zhang D, Zhang T, Lei Y, Lin W, Chen X, Wu M. Enantioselective Biosynthesis of L-Phenyllactic Acid From Phenylpyruvic Acid In Vitro by L-Lactate Dehydrogenase Coupling With Glucose Dehydrogenase. Front Bioeng Biotechnol 2022; 10:846489. [PMID: 35252153 PMCID: PMC8894805 DOI: 10.3389/fbioe.2022.846489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 01/18/2022] [Indexed: 11/13/2022] Open
Abstract
As a valuable versatile building block, L-phenyllactic acid (L-PLA) has numerous applications in the fields of agriculture, pharmaceuticals, and biodegradable plastics. However, both normally chemically synthesized and naturally occurring PLA are racemic, and the production titer of L-PLA is not satisfactory. To improve L-PLA production and reduce the high cost of NADH, an in vitro coenzyme regeneration system of NADH was achieved using the glucose dehydrogenase variant LsGDHD255C and introduced into the L-PLA production process. Here an NADH-dependent L-lactate dehydrogenase-encoding variant gene (L-Lcldh1Q88A/I229A) was expressed in Pichia pastoris GS115. The specific activity of L-LcLDH1Q88A/I229A (Pp) was as high as 447.6 U/mg at the optimum temperature and pH of 40°C and 5.0, which was 38.26-fold higher than that of wild-type L-LcLDH1 (Pp). The catalytic efficiency (kcat/Km) of L-LcLDH1Q88A/I229A (Pp) was 94.3 mM−1 s−1, which was 67.4- and 25.5-fold higher than that of L-LcLDH1(Pp) and L-LcLDH1Q88A/I229A (Ec) expressed in Escherichia coli, respectively. Optimum reactions of L-PLA production by dual-enzyme catalysis were at 40°C and pH 5.0 with 10.0 U/ml L-LcLDH1Q88A/I229A (Pp) and 4.0 U/ml LsGDHD255C. Using 0.1 mM NAD+, 400 mM (65.66 g/L) phenylpyruvic acid was completely hydrolyzed by fed-batch process within 6 h, affording L-PLA with 90.0% yield and over 99.9% eep. This work would be a promising technical strategy for the preparation of L-PLA at an industrial scale.
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Affiliation(s)
- Dong Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Ting Zhang
- Haiyan Food and Drug Inspection and Testing Center, Haiyan, China
| | - Yuqing Lei
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Wenqian Lin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xingyi Chen
- Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | - Minchen Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi, China
- *Correspondence: Minchen Wu,
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7
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Luo X, Wang Y, Zheng W, Sun X, Hu G, Yin L, Zhang Y, Yin F, Fu Y. Simultaneous improvement of the thermostability and activity of lactic dehydrogenase from Lactobacillus rossiae through rational design. RSC Adv 2022; 12:33251-33259. [PMID: 36425200 PMCID: PMC9677063 DOI: 10.1039/d2ra05599f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 11/08/2022] [Indexed: 11/22/2022] Open
Abstract
d-Phenyllactic acid, is a versatile organic acid with wide application prospects in the food, pharmaceutical and material industries. Wild-type lactate dehydrogenase LrLDH from Lactobacillus rossiae exhibits a high catalytic performance in the production of d-phenyllactic acid from phenylpyruvic acid or sodium phenylpyruvate, but its industrial application is hampered by poor thermostability. Here, computer aided rational design was applied to improve the thermostability of LrLDH. By using HotSpot Wizard 3.0, five hotspot residues (N218, L237, T247, D249 and S301) were identified, after which site-saturation mutagenesis and combined mutagenesis were performed. The double mutant D249A/T247I was screen out as the best variant, with optimum temperature, t1/2, and T1050 that were 12 °C, 17.96 min and 19 °C higher than that of wild-type LrLDH, respectively. At the same time, the kcat/Km of D249A/T247I was 1.47 s−1 mM−1, which was 3.4 times higher than that of the wild-type enzyme. Thus rational design was successfully applied to simultaneously improve the thermostability and catalytic activity of LrLDH to a significant extent. The results of molecular dynamics simulations and molecular structure analysis could explain the mechanisms for the improved performance of the double mutant. This study shows that computer-aided rational design can greatly improve the thermostability of d-lactate dehydrogenase, offering a reference for the modification of other enzymes. The d-LDH was engineered using computationally-assisted rational mutagenesis. The two mutants D249A and D249A/T247I showed significantly enhanced thermostability and catalytic activity to sodium phenylpyruvate compared with the wild-type enzyme.![]()
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Affiliation(s)
- Xi Luo
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Yifeng Wang
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Weilong Zheng
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Xiaolong Sun
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Gaowei Hu
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Longfei Yin
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Yingying Zhang
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Fengwei Yin
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
| | - Yongqian Fu
- Institute of Biomass Resources, Taizhou University, Taizhou 318000, Zhejiang, People's Republic of China
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8
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Zhou Q, Gu R, Xue B, Li P, Gu Q. Phenyl lactic acid alleviates Samonella Typhimurium-induced colitis via regulating microbiota composition, SCFA production and inflammatory responses. Food Funct 2021; 12:5591-5606. [PMID: 34017972 DOI: 10.1039/d1fo00166c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Colitis caused by non-typhoidal Salmonella (NST) infection is increasingly serious and widespread, so new effective treatment strategies with little or no side-effects are urgently needed. Our previous research found that phenyl lactic acid (PLA) derived from Lactobacillus plantarum ZJ316 can effectively inhibit Salmonella enterica Typhimurium (S. Typhimurium). In this study, we further investigated the protective effects of this PLA against S. Typhimurium-induced colitis in mice. An infection model was established using female C57BL/6J mice by oral administration of 109 CFU mL-1 of S. Typhimurium, and PLA was supplied for 10 days after infection. In colitic mice, PLA administration reduced the disease activity index, prevented the colon shortening and spleen enlargement, decreased liver enzyme (AST and ALT) activities, and alleviated the colonic tissue damage. RT-qPCR analysis showed that PLA significantly down-regulated the levels of NF-κB, TLR4 and pro-inflammatory cytokines (IFN-γ, IL-1β and TNF-α), but stimulated the mRNA expression of the anti-inflammatory cytokine IL-10. Changes in intestinal microecology were analyzed by 16S rRNA sequencing. PLA modulated colonic microbiota dysbiosis by increasing the abundance of Lactobacillus, Butyricicoccus and Roseburia, and reducing Salmonella and Alloprevotella at the genus level. In addition, PLA significantly increased the concentrations of short-chain fatty acids (SCFAs) in the colon, especially propionic acid and butyric acid. These findings revealed that PLA has potential benefits on alleviating S. Typhimurium-induced colitis mainly through intestinal microbiota regulation and inflammation elimination, providing a new perspective for the NTS infection treatment strategy.
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Affiliation(s)
- Qingqing Zhou
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
| | - Rongcheng Gu
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, USA
| | - Bingyao Xue
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
| | - Ping Li
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
| | - Qing Gu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, China.
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9
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Bireddy SR, Konkala VS, Godugu C, Dubey PK. A Review on the Synthesis and Biological Studies of 2,4-Thiazolidinedione Derivatives. MINI-REV ORG CHEM 2020. [DOI: 10.2174/1570193x17666200221123633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
2,4-Thiazolidinediones are versatile scaffolds with a unique structural feature of hydrogen
bonding donor and the hydrogen bonding acceptor region. This review deals with the synthesis of
various bio-active 2,4-thiazolidinedione derivatives. It is presented on the basis of the linker variations
at 3rd & 5th positions of 2,4-thizolidinediones. Biological evaluations of various derivatives thus
prepared and toxicity studies on the respective products as given by various researchers/ Research
groups have been described.
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Affiliation(s)
- Srinivasa Reddy Bireddy
- Department of Chemistry, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad-500 075, India
| | - Veera Swamy Konkala
- Department of Chemistry, Jawaharlal Nehru Technological University, College of Engineering, Kukatpally, Hyderabad- 500 085, India
| | - Chandraiah Godugu
- Department of Regulatory Toxicology, National Institute of Pharmaceutical Educational Research Balanagar, Hyderabad-500 037, India
| | - Pramod Kumar Dubey
- Department of Chemistry, Jawaharlal Nehru Technological University, College of Engineering, Kukatpally, Hyderabad- 500 085, India
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10
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Xia G, Zhuang Z, Liu LY, Schreiber SL, Melillo B, Yu JQ. Ligand-Enabled β-Methylene C(sp 3 )-H Arylation of Masked Aliphatic Alcohols. Angew Chem Int Ed Engl 2020; 59:7783-7787. [PMID: 32050036 PMCID: PMC7219561 DOI: 10.1002/anie.202000632] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Indexed: 12/18/2022]
Abstract
Despite recent advances, reactivity and site-selectivity remain significant obstacles for the practical application of C(sp3 )-H bond functionalization methods. Here, we describe a system that combines a salicylic-aldehyde-derived L,X-type directing group with an electron-deficient 2-pyridone ligand to enable the β-methylene C(sp3 )-H arylation of aliphatic alcohols, which has not been possible previously. Notably, this protocol is compatible with heterocycles embedded in both alcohol substrates and aryl coupling partners. A site- and stereo-specific annulation of dihydrocholesterol and the synthesis of a key intermediate of englitazone illustrate the practicality of this method.
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Affiliation(s)
- Guoqin Xia
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Zhe Zhuang
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Luo-Yan Liu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Stuart L Schreiber
- Chemical Biology and Therapeutics Science Program, Broad Institute, Cambridge, MA, 02142, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Bruno Melillo
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
- Chemical Biology and Therapeutics Science Program, Broad Institute, Cambridge, MA, 02142, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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11
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Xia G, Zhuang Z, Liu L, Schreiber SL, Melillo B, Yu J. Ligand‐Enabled β‐Methylene C(sp
3
)−H Arylation of Masked Aliphatic Alcohols. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000632] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Guoqin Xia
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Zhe Zhuang
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Luo‐Yan Liu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Stuart L. Schreiber
- Chemical Biology and Therapeutics Science Program Broad Institute Cambridge MA 02142 USA
- Department of Chemistry and Chemical Biology Harvard University Cambridge MA 02138 USA
| | - Bruno Melillo
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
- Chemical Biology and Therapeutics Science Program Broad Institute Cambridge MA 02142 USA
| | - Jin‐Quan Yu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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12
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Luo X, Zhang Y, Yin F, Hu G, Jia Q, Yao C, Fu Y. Enzymological characterization of a novel d-lactate dehydrogenase from Lactobacillus rossiae and its application in d-phenyllactic acid synthesis. 3 Biotech 2020; 10:101. [PMID: 32099742 DOI: 10.1007/s13205-020-2098-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 01/24/2020] [Indexed: 12/28/2022] Open
Abstract
A novel lactate dehydrogenase gene, named lrldh, was cloned from Lactobacillus rossiae and heterologously expressed in Escherichia coli. The lactate dehydrogenase LrLDH is NADH-dependent with a molecular weight of approximately 39 kDa. It is active at 40 °C and pH 6.5 and stable in a neutral to alkaline environment below 35 °C. The kinetic constants, including maximal reaction rate (V max), apparent Michaelis-Menten constant (K m), turnover number (K cat) and catalytic efficiency (K cat/K m) for phenylpyruvic acid were 1.95 U mg-1, 2.83 mM, 12.29 s-1, and 4.34 mM-1 s-1, respectively. Using whole cells of recombinant E. coli/pET28a-lrldh, without coexpression of a cofactor regeneration system, 20.5 g l-1 d-phenyllactic acid with ee above 99% was produced from phenylpyruvic acid in a fed-batch biotransformation process, with a productivity of 49.2 g l-1 d-1. Moreover, LrLDH has broad substrate specificity to a range of ketones, keto acids and ketonic esters. Taken together, LrLDH is a promising biocatalyst for the efficient synthesis of d-phenyllactic acid and other fine chemicals.
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Affiliation(s)
- Xi Luo
- 1Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People's Republic of China
| | - Yingying Zhang
- 1Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People's Republic of China
| | - Fengwei Yin
- 1Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People's Republic of China
| | - Gaowei Hu
- 1Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People's Republic of China
| | - Qiang Jia
- Seasons Biotechnology (Taizhou) Co., Ltd, Taizhou, 318000 Zhejiang People's Republic of China
| | - Changsheng Yao
- 3Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 Jiangsu People's Republic of China
| | - Yongqian Fu
- 1Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People's Republic of China
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13
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Luo X, Zhang Y, Yin L, Zheng W, Fu Y. Efficient synthesis of d-phenyllactic acid by a whole-cell biocatalyst co-expressing glucose dehydrogenase and a novel d-lactate dehydrogenase from Lactobacillus rossiae. 3 Biotech 2020; 10:14. [PMID: 31879578 PMCID: PMC6904706 DOI: 10.1007/s13205-019-2003-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 12/02/2019] [Indexed: 12/11/2022] Open
Abstract
d-Phenyllactic acid is a versatile natural organic acid, which is used as an antiseptic agent, monomer of the biodegradable material poly-phenyllactic acid and in the synthesis chiral intermediate of pharmaceuticals. In this report, the novel NADH-dependent d-lactate dehydrogenase LrLDH was identified by screening a shotgun genome of Lactobacillus rossiae. To improve cofactor regeneration, the Exiguobacterium sibiricum glucose dehydrogenase EsGDH was overexpressed together with LrLDH in E. coli BL21(DE3)-pCDFDuet-1-gdh-ldh. The total enzyme activity in the fermentation broth of E. coli BL 21(DE3)-pCDFDuet-1-gdh-ldh peaked at 2359.0 U l-1 when induced by 10 g l-1 lactose at 28 °C and 150 rpm for 14 h. The biocatalytic reduction of sodium phenylpyruvate to d-phenyllactic acid was successfully carried out using whole cells of the engineered E. coli. Under the optimized biocatalysis conditions, 50 g l-1 sodium phenylpyruvate was completely converted to d-phenyllactic acid with a space-time yield and enantiomeric excess of 262.8 g l-1 day-1 and > 99.5%, respectively. To our best knowledge, it is the highest productivity reported to date, with great potential for the mass production of d-phenyllactic acid.
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Affiliation(s)
- Xi Luo
- Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People’s Republic of China
| | - Yingying Zhang
- Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People’s Republic of China
| | - Longfei Yin
- Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People’s Republic of China
| | - Weilong Zheng
- Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People’s Republic of China
| | - Yongqian Fu
- Institute of Biomass Resources, Taizhou University, Taizhou, 318000 Zhejiang People’s Republic of China
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Lu Y, Nakatsuji H, Okumura Y, Yao L, Ishihara K. Enantioselective Halo-oxy- and Halo-azacyclizations Induced by Chiral Amidophosphate Catalysts and Halo-Lewis Acids. J Am Chem Soc 2018; 140:6039-6043. [PMID: 29708750 DOI: 10.1021/jacs.8b02607] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Catalytic enantioselective halocyclization of 2-alkenylphenols and enamides have been achieved through the use of chiral amidophosphate catalysts and halo-Lewis acids. Density functional theory calculations suggested that the Lewis basicity of the catalyst played an important role in the reactivity and enantioselectivity. The resulting chiral halogenated chromans can be transformed to α-Tocopherol, α-Tocotrienol, Daedalin A and Englitazone in short steps. Furthermore, a halogenated product with an unsaturated side chain may provide polycyclic adducts under radical cyclization conditions.
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Affiliation(s)
- Yanhui Lu
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Hidefumi Nakatsuji
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Yukimasa Okumura
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Lu Yao
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
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15
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Zhang Y, Wang Q, Wang T, He H, Yang W, Zhang X, Cai Q. Enantioselective Synthesis of Chiral Oxygen-Containing Heterocycles Using Copper-Catalyzed Aryl C-O Coupling Reactions via Asymmetric Desymmetrization. J Org Chem 2017; 82:1458-1463. [PMID: 28054776 DOI: 10.1021/acs.joc.6b02646] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An enantioselective desymmetric aryl C-O coupling reaction was demonstrated under the catalysis of CuI and a chiral cyclic diamine ligand. A series of chiral oxygen-containing heterocyclic units such as 2,3-dihydrobenzofurans, chromans, and 1,4-benzodioxanes with tertiary or quaternary stereocarbon centers were synthesized with this method. DFT calculations were also carried out for a better understanding of the model for enantiocontrol.
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Affiliation(s)
- Yong Zhang
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology , Shijiazhuang, 050018, China
| | - Qiuyan Wang
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology , Shijiazhuang, 050018, China.,College of Pharmacy, Jinan University , No. 601 Huangpu Avenue West, Guangzhou, 510632, China
| | - Ting Wang
- Laboratory of Computational Chemistry and Drug Design, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School , Shenzhen, 518055, China
| | - Huan He
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology , Shijiazhuang, 050018, China.,College of Pharmacy, Jinan University , No. 601 Huangpu Avenue West, Guangzhou, 510632, China
| | - Wenqiang Yang
- College of Pharmacy, Linyi University , Shuangling Road, Linyi, 276000, China
| | - Xinhao Zhang
- Laboratory of Computational Chemistry and Drug Design, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School , Shenzhen, 518055, China
| | - Qian Cai
- College of Pharmacy, Jinan University , No. 601 Huangpu Avenue West, Guangzhou, 510632, China
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16
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Xue YP, Zeng H, Jin XL, Liu ZQ, Zheng YG. Enantioselective cascade biocatalysis for deracemization of 2-hydroxy acids using a three-enzyme system. Microb Cell Fact 2016; 15:162. [PMID: 27659410 PMCID: PMC5034429 DOI: 10.1186/s12934-016-0560-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 09/14/2016] [Indexed: 11/10/2022] Open
Abstract
Background Enantiopure 2-hydroxy acids are key intermediates for the synthesis of pharmaceuticals and fine chemicals. We present an enantioselective cascade biocatalysis using recombinant microbial cells for deracemization of racemic 2-hydroxy acids that allows for efficient production of enantiopure 2-hydroxy acids. Results The method was realized by a single recombinant Escherichia coli strain coexpressing three enzymes: (S)-2-hydroxy acid dehydrogenase, (R)-2-keto acid reductase and glucose dehydrogenase. One enantiomer [(S)-2-hydroxy acid] is firstly oxidized to the keto acid with (S)-2-hydroxy acid dehydrogenase, while the other enantiomer [(R)-2-hydroxy acid] remains unchanged. Then, the keto acid obtained reduced to the opposite enantiomer with (R)-2-keto acid reductase plus cofactor regeneration enzyme glucose dehydrogenase subsequently. The recombinant E. coli strain coexpressing the three enzymes was proven to be a promising biocatalyst for the cascade bioconversion of a structurally diverse range of racemic 2-hydroxy acids, giving the corresponding (R)-2-hydroxy acids in up to 98.5 % conversion and >99 % enantiomeric excess. Conclusions In summary, a cascade biocatalysis was successfully developed to prepare valuable (R)-2-hydroxy acids with an efficient three-enzyme system. The developed elegant cascade biocatalysis possesses high atom efficiency and represents a promising strategy for production of highly valued (R)-2-hydroxy acids. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0560-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ya-Ping Xue
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Hao Zeng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Xiao-Lu Jin
- Yosemade Pharmaceutical Co. Ltd., Jinhua, 321025, People's Republic of China
| | - Zhi-Qiang Liu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Yu-Guo Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
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17
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Hu N, Li K, Wang Z, Tang W. Synthesis of Chiral 1,4-Benzodioxanes and Chromans by Enantioselective Palladium-Catalyzed Alkene Aryloxyarylation Reactions. Angew Chem Int Ed Engl 2016; 55:5044-8. [DOI: 10.1002/anie.201600379] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 02/03/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Naifu Hu
- State Key Laboratory of Bio-organic and Natural Products Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Ke Li
- State Key Laboratory of Bio-organic and Natural Products Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
| | - Zheng Wang
- Innovation Center China; AstraZeneca Global R&D; China
| | - Wenjun Tang
- State Key Laboratory of Bio-organic and Natural Products Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling Ling Rd Shanghai 200032 China
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18
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Synthesis of Chiral 1,4-Benzodioxanes and Chromans by Enantioselective Palladium-Catalyzed Alkene Aryloxyarylation Reactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600379] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Xu GC, Zhang LL, Ni Y. Enzymatic preparation of D-phenyllactic acid at high space-time yield with a novel phenylpyruvate reductase identified from Lactobacillus sp. CGMCC 9967. J Biotechnol 2015; 222:29-37. [PMID: 26712480 DOI: 10.1016/j.jbiotec.2015.12.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 12/09/2015] [Accepted: 12/10/2015] [Indexed: 11/29/2022]
Abstract
An NADH-dependent phenylpyruvate reductase (LaPPR) was identified through screening the shotgun library of Lactobacillus sp. CGMCC 9967. It belongs to D-3-phosphoglycerate dehydrogenase (PGDH) subfamily of 2-hydroxy acid dehydrogenase superfamily. LaPPR was stable at pH 6.5 and 30 °C, with a half-life of 152 h. LaPPR has a substrate preference towards aromatic to aliphatic keto acids, and various keto acids could be reduced into D-hydroxy acids with excellent enantioselectivity (>99%). By construction the coexpression system with glucose dehydrogenase, as much as 100 g L(-1) phenylpyruvic acid was asymmetrically reduced into D-phenyllactic acid with 91.3% isolation yield and 243 g L(-1) d(-1) productivity. The results suggest that LaPPR is a promising biocatalyst for the efficient synthesis of optically pure D-phenyllactic acid.
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Affiliation(s)
- Guo-Chao Xu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Ling-Ling Zhang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Ye Ni
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
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20
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Diastereoselective acylation of 3,4-dihydro-3-methyl-2H-[1,4]benzoxazines with 2-phenoxy carbonyl chlorides. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Chen J, Chen C, Chen J, Wang G, Qu H. Cu-catalyzed intramolecular aryl-etherification reactions of alkoxyl alkynes with diaryliodonium salts via cleavage of a stable C–O bond. Chem Commun (Camb) 2015; 51:1356-9. [DOI: 10.1039/c4cc08363f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cu-catalyzed aryl-etherification reactions of alkoxyl alkynes with diaryliodonium salts are realized to produce oxo-heterocyclesviacleavage of a stable C–O bond.
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Affiliation(s)
- Jing Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- China
| | - Chao Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- China
| | - Junjie Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- China
| | - Guohua Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- China
| | - Hongmei Qu
- Key Laboratory of Systems Bioengineering
- Ministry of Education
- Department of Pharmaceutical Engineering
- School of Chemical Engineering and Technology
- Tianjin University
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22
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Highly stereoselective biosynthesis of (R)-α-hydroxy carboxylic acids through rationally re-designed mutation of D-lactate dehydrogenase. Sci Rep 2013; 3:3401. [PMID: 24292439 PMCID: PMC4070498 DOI: 10.1038/srep03401] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 11/15/2013] [Indexed: 12/02/2022] Open
Abstract
An NAD-dependent d-lactate dehydrogenase (d-nLDH) of Lactobacillus bulgaricus ATCC 11842 was rationally re-designed for asymmetric reduction of a homologous series of α-keto carboxylic acids such as phenylpyruvic acid (PPA), α-ketobutyric acid, α-ketovaleric acid, β-hydroxypyruvate. Compared with wild-type d-nLDH, the Y52L mutant d-nLDH showed elevated activities toward unnatural substrates especially with large substitutes at C-3. By the biocatalysis combined with a formate dehydrogenase for in situ generation of NADH, the corresponding (R)-α-hydroxy carboxylic acids could be produced at high yields and highly optical purities. Taking the production of chiral (R)-phenyllactic acid (PLA) from PPA for example, 50 mM PPA was completely reduced to (R)-PLA in 90 min with a high yield of 99.0% and a highly optical purity (>99.9% e.e.) by the coupling system. The results presented in this work suggest a promising alternative for the production of chiral α-hydroxy carboxylic acids.
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23
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Varghese S, Anand C, Dhawale D, Mane GP, Wahab MA, Mano A, Raj GAG, Nagarajan S, Vinu A. Highly Selective Synthesis ofOrtho-Prenylated Phenols and Chromans by using a New Bimetallic CuAl-KIT-5 with a 3D-Cage-type Mesoporous Structure. ChemCatChem 2012. [DOI: 10.1002/cctc.201200332] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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24
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Ward AF, Xu Y, Wolfe JP. Synthesis of chromans via Pd-catalyzed alkene carboetherification reactions. Chem Commun (Camb) 2011; 48:609-11. [PMID: 22113305 DOI: 10.1039/c1cc15880e] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method for the construction of 2-substituted and 2,2-disubstituted chromans via Pd-catalyzed carboetherification reactions between aryl/alkenyl halides and 2-(but-3-en-1-yl)phenols is described. These reactions effect formation of a C-O bond and a C-C bond to afford the chroman products in good yield, and also provide stereoselective access to tricyclic chroman derivatives.
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Affiliation(s)
- Amanda F Ward
- University of Michigan, Department of Chemistry, 930 N. University Ave., Ann Arbor, MI 48109-1055, USA
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25
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Marco I, Valhondo M, Martín-Fontecha M, Vázquez-Villa H, Del Río J, Planas A, Sagredo O, Ramos JA, Torrecillas IR, Pardo L, Frechilla D, Benhamú B, López-Rodríguez ML. New serotonin 5-HT(1A) receptor agonists with neuroprotective effect against ischemic cell damage. J Med Chem 2011; 54:7986-99. [PMID: 22029386 DOI: 10.1021/jm2007886] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We report the synthesis of new compounds 4-35 based on structural modifications of different moieties of previously described lead UCM-2550. The new nonpiperazine derivatives, representing second-generation agonists, were assessed for binding affinity, selectivity, and functional activity at the 5-HT(1A) receptor (5-HT(1A)R). Computational β(2)-based homology models of the ligand-receptor complexes were used to explain the observed structure-affinity relationships. Selected candidates were also evaluated for their potential in vitro and in vivo neuroprotective properties. Interestingly, compound 26 (2-{6-[(3,4-dihydro-2H-chromen-2-ylmethyl)amino]hexyl}tetrahydro-1H-pyrrolo[1,2-c]imidazole-1,3(2H)-dione) has been characterized as a high-affinity and potent 5-HT(1A)R agonist (K(i) = 5.9 nM, EC(50) = 21.8 nM) and exhibits neuroprotective effect in neurotoxicity assays in primary cell cultures from rat hippocampus and in the MCAO model of focal cerebral ischemia in rats.
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Affiliation(s)
- Isabel Marco
- Departamento de Química Orgánica I, Universidad Complutense de Madrid, E-28040 Madrid, Spain
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26
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Zheng Z, Ma C, Gao C, Li F, Qin J, Zhang H, Wang K, Xu P. Efficient conversion of phenylpyruvic acid to phenyllactic acid by using whole cells of Bacillus coagulans SDM. PLoS One 2011; 6:e19030. [PMID: 21533054 PMCID: PMC3080406 DOI: 10.1371/journal.pone.0019030] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Accepted: 03/15/2011] [Indexed: 11/23/2022] Open
Abstract
Background Phenyllactic acid (PLA), a novel antimicrobial compound with broad and effective antimicrobial activity against both bacteria and fungi, can be produced by many microorganisms, especially lactic acid bacteria. However, the concentration and productivity of PLA have been low in previous studies. The enzymes responsible for conversion of phenylpyruvic acid (PPA) into PLA are equivocal. Methodology/Principal Findings A novel thermophilic strain, Bacillus coagulans SDM, was isolated for production of PLA. When the solubility and dissolution rate of PPA were enhanced at a high temperature, whole cells of B. coagulans SDM could effectively convert PPA into PLA at a high concentration (37.3 g l−1) and high productivity (2.3 g l−1 h−1) under optimal conditions. Enzyme activity staining and kinetic studies identified NAD-dependent lactate dehydrogenases as the key enzymes that reduced PPA to PLA. Conclusions/Significance Taking advantage of the thermophilic character of B. coagulans SDM, a high yield and productivity of PLA were obtained. The enzymes involved in PLA production were identified and characterized, which makes possible the rational design and construction of microorganisms suitable for PLA production with metabolic engineering.
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Affiliation(s)
- Zhaojuan Zheng
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Cuiqing Ma
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
- * E-mail: (CM); (PX)
| | - Chao Gao
- MOE Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Fengsong Li
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Jiayang Qin
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Haiwei Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Kai Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
| | - Ping Xu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China
- MOE Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
- * E-mail: (CM); (PX)
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27
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Trichosporon cutaneum-promoted deracemization of (±)-2-hydroxindan-1-one: a mechanistic study. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.tetasy.2007.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Obushak MD, Karpyak VV, Ostapiuk YV, Matiychuk VS. Utilization of Methyl 3-Aryl-2-thiocyanatopropanoates in the Synthesis of 2-(4-Morpholinyl)- and 2-(Piperazinyl)-5-(benzyl)thiazol-4-ones1. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426500701242103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Mykola D. Obushak
- a Department of Organic Chemistry , Ivan Franko National University of Lviv , Lviv , Ukraine
| | - Volodymyr V. Karpyak
- a Department of Organic Chemistry , Ivan Franko National University of Lviv , Lviv , Ukraine
| | - Yuri V. Ostapiuk
- a Department of Organic Chemistry , Ivan Franko National University of Lviv , Lviv , Ukraine
| | - Vasyl S. Matiychuk
- a Department of Organic Chemistry , Ivan Franko National University of Lviv , Lviv , Ukraine
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29
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Sajeli Begum A, Sahai M, Fujimoto Y, Asai K, Schneider K, Nicholson G, Suessmuth R. A new kaempferol diglycoside from Datura suaveolens Humb. & Bonpl. ex. Willd. Nat Prod Res 2006; 20:1231-6. [PMID: 17127514 DOI: 10.1080/14786410600905816] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A new flavonol glycoside, kaempferol 3-O-alpha-L-arabinopyranosyl-7-O-beta-D-glucopyranoside (1), has been isolated from methanol extract of leaves of Datura suaveolens (Solanaceae), along with six other known compounds, which include kaempferol 3-O-alpha-L-arabinopyranoside (2), 3-phenyl lactic acid, 3-(3-indolyl) lactic acid, and its methyl ester, physalindicanol A and physalindicanol B. The structural elucidation of 1 and characterization of the known compounds are based on detailed spectral analysis (ESI-FTICR-MS and 2D-NMR). This is the first report of isolation of these compounds from this plant.
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Affiliation(s)
- A Sajeli Begum
- Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, India
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30
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Caron S, Dugger RW, Ruggeri SG, Ragan JA, Ripin DHB. Large-Scale Oxidations in the Pharmaceutical Industry. Chem Rev 2006; 106:2943-89. [PMID: 16836305 DOI: 10.1021/cr040679f] [Citation(s) in RCA: 542] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stéphane Caron
- Chemical Research and Development, Pfizer Global Research Division, Pfizer Inc., Eastern Point Road, Groton, Connecticut 06340, USA
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31
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Chu GH, Gu M, Cassel JA, Belanger S, Graczyk TM, DeHaven RN, Conway-James N, Koblish M, Little PJ, DeHaven-Hudkins DL, Dolle RE. Potent and highly selective kappa opioid receptor agonists incorporating chroman- and 2,3-dihydrobenzofuran-based constraints. Bioorg Med Chem Lett 2005; 15:5114-9. [PMID: 16203140 DOI: 10.1016/j.bmcl.2005.08.094] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2005] [Revised: 08/24/2005] [Accepted: 08/24/2005] [Indexed: 11/25/2022]
Abstract
Two novel chemical classes of kappa opioid receptor agonists, chroman-2-carboxamide derivatives and 2,3-dihydrobenzofuran-2-carboxamide derivatives, were synthesized. These agents exhibited high and selective affinity for the kappa opioid receptor.
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Affiliation(s)
- Guo-Hua Chu
- Department of Chemistry, Adolor Corporation, 700 Pennsylvania Drive, Exton, PA 19341, USA.
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32
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Matiichuk VS, Obushak ND, Tsyalkovskii VM. Synthesis of Heterocycles from Arylation Products of Unsaturated Compounds: XIII. 5-R1-Benzyl-2-(R2-2-pyridylimino)thiazolidin-4-ones. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2005. [DOI: 10.1007/s11178-005-0292-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zhang M, Reeves R, Bi C, Dally R, Ladouceur G, Bullock W, Chin J. Synthesis of optically active 6-substituted 2-(aminomethyl)chromans. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.05.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Storz T, Dittmar P, Fauquex PF, Marschal P, Lottenbach WU, Steiner H. Process Research of (R)-Cyclohexyl Lactic Acid and Related Building Blocks: A Comparative Study. Org Process Res Dev 2003. [DOI: 10.1021/op030202q] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Meester W, Maarseveen J, Schoemaker H, Hiemstra H, Rutjes F. Glyoxylates as Versatile Building Blocks for the Synthesis of α‐Amino Acid and α‐Alkoxy Acid Derivatives via Cationic Intermediates. European J Org Chem 2003. [DOI: 10.1002/ejoc.200200714] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Wim J. N. Meester
- Institute of Molecular Chemistry, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands
| | - Jan H. van Maarseveen
- Institute of Molecular Chemistry, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands
| | - Hans E. Schoemaker
- DSM Research, Life Science Products, P. O. Box 18, 6160 MD Geleen, The Netherlands
| | - Henk Hiemstra
- Institute of Molecular Chemistry, University of Amsterdam, Nieuwe Achtergracht 129, 1018 WS Amsterdam, The Netherlands
| | - Floris P. J. T. Rutjes
- Department of Organic Chemistry, NSRIM, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands, Fax: (internat.) + 31‐24/365‐3393
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Tao J, McGee K. Development of a Continuous Enzymatic Process for the Preparation of (R)-3-(4-Fluorophenyl)-2-hydroxy Propionic Acid. Org Process Res Dev 2002. [DOI: 10.1021/op010232y] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junhua Tao
- Pfizer Global Research and Development, La Jolla Laboratories, Pfizer Inc., 3565 General Atomics Court, San Diego, California 92121, U.S.A
| | - Kevin McGee
- Pfizer Global Research and Development, La Jolla Laboratories, Pfizer Inc., 3565 General Atomics Court, San Diego, California 92121, U.S.A
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Nie MY, Zhou LM, Wang QH, Zhu DQ. Enantiomer separation of mandelates and their analogs on cyclodextrin derivative chiral stationary phases by capillary GC. ANAL SCI 2001; 17:1183-7. [PMID: 11990593 DOI: 10.2116/analsci.17.1183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Enantiomer separation of mandelates and their analogs, which are important intermediates in asymmetric synthetic and pharmaceutical chemistry, was investigated by capillary gas chromatography using different cyclodextrin derivative chiral stationary phases (CD CSPs). The used cyclodextrin derivatives included permethylated beta-CD (PMBCD), permethylated gamma-CD, heptakis(2,6-di-O-butyl-3-O-butyryl)-beta-CD, heptakis(2,6-di-O-pentyl-3-O-acetyl)-beta-CD and heptakis(2,6-di-O-nonyl-3-O-trifluoroacetyl)-beta-CD (DNTBCD), respectively. Among all the CSPs used, PMBCD and DNTBCD exhibited the broadest and best enantioselectivity for all the racemates investigated. Some thermodynamic parameters were evaluated and an enthalpy-entropy compensation effect was observed in enantiomer separation processes of mandelates and their analogs. Based on thermodynamic data and molecular mechanics calculations, the chiral recognition mechanism of mandelate derivatives on CD CSPs is discussed.
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Affiliation(s)
- M Y Nie
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P R China.
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Shin I, Lee M, Lee J, Jung M, Lee W, Yoon J. Synthesis of optically active phthaloyl D-aminooxy acids from L-amino acids or L-hydroxy acids as building blocks for the preparation of aminooxy peptides. J Org Chem 2000; 65:7667-75. [PMID: 11076633 DOI: 10.1021/jo0006573] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- I Shin
- Department of Chemistry and Department of Biochemistry, Yonsei University, Seoul 120-749, Korea.
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Czompa A, Kovács T, Antus S. Lipase-catalysed kinetic resolution of hydroxymethylchromanes. J Heterocycl Chem 2000. [DOI: 10.1002/jhet.5570370450] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kajiro H, Mitamura S, Mori A, Hiyama T. A Practical Synthesis of (1S,2R)-1-Amino-2-indanol, a Key Component of an HIV Protease Inhibitor, Indinavir. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1999. [DOI: 10.1246/bcsj.72.1093] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ward DE, Vázquez A, Pedras MSC. Probing Host-Selective Phytotoxicity: Synthesis and Biological Activity of Phomalide, Isophomalide, and Dihydrophomalide. J Org Chem 1999; 64:1657-1666. [PMID: 11674233 DOI: 10.1021/jo982376p] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cyclic depsipeptide phomalide [cyclo(Val-(E)-Aba-Hpp-Hmp-(R)-Leu); Aba = 2-amino-2-butenoic acid, Hpp = (2S)-2-hydroxy-3-phenylpropanoic acid, Hmp = (2S)-2-hydroxy-4-methylpentanoic acid] is the host-selective phytotoxin produced by the fungus [Leptosphaeria maculans (Desm.) Ces. et de Not., asexual stage Phoma lingam (Tode ex Fr.) Desm.] which causes blackleg disease (a devastating disease of several economically important brassica crops). Efficient total syntheses of phomalide, its (Z)-isomer isophomalide, and the two dihydro analogues [(R)-dihydrophomalide and (S)-dihydrophomalide] are described. A [2 + 3] fragment coupling of Cbz-Val-(Z)-Aba with Hpp-Hmp-D-Leu-OBn followed by deprotection and cyclization gave isophomalide which was diastereoselectively isomerized to phomalide by conjugate addition of PhSeH followed by elimination of the corresponding selenoxide. The dihydro analogues were prepared similarly using Cbz-Val-(R)-Abu or Cbz-Val-(S)-Abu (Abu = 2-aminobutanoic acid) in place of Cbz-Val-(Z)-Aba. Biological evaluations of phomalide, isophomalide, and the dihydrophomalides revealed that only phomalide (10(-)(5) M) caused necrotic, chlorotic, and reddish lesions on canola (Brassica napus and Brassica rapa; susceptible to blackleg) leaves whereas no damage was observed on brown mustard (Brassica juncea; resistant to blackleg) or white mustard (Sinapis alba; resistant to blackleg) leaves, even at significantly higher concentrations (10(-)(4) M). Thus, both the presence and configuration of the double bond is crucial for selective phytotoxicity. This is the first reported synthesis of an (E)-Aba-containing natural product, and importantly, the (Z) --> (E) isomerization approach should be applicable to other (depsi)peptide targets thereby allowing investigation of the effect of the double-bond configuration on various properties.
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Affiliation(s)
- Dale E. Ward
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
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Labrosse JR, Poncet C, Lhoste P, Sinou D. Asymmetric palladium(0)-mediated synthesis of 2-vinylchroman. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0957-4166(99)00077-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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Enantiomeric impurities in chiral catalysts, auxiliaries, synthons and resolving agents. Part 2. ACTA ACUST UNITED AC 1999. [DOI: 10.1016/s0957-4166(98)00476-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Raggon JW, Welborn JM, Godlewski JE, Kelly SE, Lacour TG. PREPARATION OF 4-CHLORO-2-THIOPHENECARBOXYLIC ACIDviaSELECTIVE BISULFITE SALT ADDITION PROCEDURE. ORG PREP PROCED INT 1995. [DOI: 10.1080/00304949509458460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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