1
|
Liu J, Chen K, Guo Y, Chen Y, Ye T. Total Synthesis of Rhizopodin Enabled by a Late-Stage Oxazole Ring Formation Strategy. Org Lett 2024; 26:8928-8933. [PMID: 39360860 DOI: 10.1021/acs.orglett.4c03414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2024]
Abstract
Actin stabilizers that are capable of interfering with actin cytoskeleton dynamics play an important role in chemical biology. Rhizopodin, a novel actin stabilizer, affects the actin cytoskeleton at nanomolar concentrations and exhibits potent antiproliferative activities against a range of tumor cell lines with IC50 values in the low nanomolar range. Herein, we report the total synthesis of rhizopodin based on a late-stage oxazole ring formation strategy, whose success demonstrates the feasibility of late-stage oxazole ring formation in the synthesis of complex oxazole containing natural products. Other features of the synthesis include a Nagao aldol reaction, a Suzuki coupling, a Yamaguchi esterification, a modified Robinson-Gabriel synthesis of the oxazoles, and a bidirectional Ba(OH)2-mediated Horner-Wadsworth-Emmons (HWE) reaction.
Collapse
Affiliation(s)
- Junyang Liu
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, 529020, China
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China
| | - Kai Chen
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China
| | - Yian Guo
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China
| | - Ying Chen
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China
| | - Tao Ye
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China
- Qian Yan (Shenzhen) Pharmatech. Ltd., Shenzhen 518172, China
| |
Collapse
|
2
|
Xiao Y, Jiang Y, Xu C, Nakliang P, Yoon S, Choi S, Guo Y, Ye T. Total synthesis of thioamycolamide A using diastereoselective sulfa-Michael addition as the key step. Org Chem Front 2022. [DOI: 10.1039/d2qo00747a] [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
The total synthesis of the antitumor natural product thioamycolamide A has been accomplished in 19.1% overall yield featuring a diastereoselective sulfa-Michael reaction.
Collapse
Affiliation(s)
- Yi Xiao
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055, China
| | - Yangyang Jiang
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055, China
| | - Chao Xu
- Innovation Center of Marine Biotechnology and Pharmaceuticals, Wuyi University, Jiangmen, 529020, Guangdong, China
| | - Pratanphorn Nakliang
- Global AI Drug Discovery Center, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sanghee Yoon
- Global AI Drug Discovery Center, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sun Choi
- Global AI Drug Discovery Center, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Yian Guo
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055, China
- Innovation Center of Marine Biotechnology and Pharmaceuticals, Wuyi University, Jiangmen, 529020, Guangdong, China
| | - Tao Ye
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Xili, Nanshan District, Shenzhen, 518055, China
| |
Collapse
|
3
|
Hai Y, Wei MY, Wang CY, Gu YC, Shao CL. The intriguing chemistry and biology of sulfur-containing natural products from marine microorganisms (1987-2020). MARINE LIFE SCIENCE & TECHNOLOGY 2021; 3:488-518. [PMID: 37073258 PMCID: PMC10077240 DOI: 10.1007/s42995-021-00101-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/18/2021] [Indexed: 05/03/2023]
Abstract
Natural products derived from marine microorganisms have received great attention as a potential resource of new compound entities for drug discovery. The unique marine environment brings us a large group of sulfur-containing natural products with abundant biological functionality including antitumor, antibiotic, anti-inflammatory and antiviral activities. We reviewed all the 484 sulfur-containing natural products (non-sulfated) isolated from marine microorganisms, of which 59.9% are thioethers, 29.8% are thiazole/thiazoline-containing compounds and 10.3% are sulfoxides, sulfones, thioesters and many others. A selection of 133 compounds was further discussed on their structure-activity relationships, mechanisms of action, biosynthesis, and druggability. This is the first systematic review on sulfur-containing natural products from marine microorganisms conducted from January 1987, when the first one was reported, to December 2020. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-021-00101-2.
Collapse
Affiliation(s)
- Yang Hai
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Mei-Yan Wei
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003 China
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Yu-Cheng Gu
- Syngenta Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY UK
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| |
Collapse
|
4
|
Total Synthesis of Pagoamide A. Molecules 2021; 26:molecules26144224. [PMID: 34299497 PMCID: PMC8307129 DOI: 10.3390/molecules26144224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/27/2021] [Accepted: 06/30/2021] [Indexed: 11/16/2022] Open
Abstract
The first total synthesis of the thiazole-containing cyclic depsipeptide pagoamide A, is detailed. The longest linear sequence of the liquid-phase synthesis comprises 9 long linear steps from simple known starting materials, which led to the unambiguous structural confirmation of pagoamide A.
Collapse
|
5
|
Butler E, Florentino L, Cornut D, Gomez-Campillos G, Liu H, Regan AC, Thomas EJ. Synthesis of macrocyclic precursors of the vioprolides. Org Biomol Chem 2019; 16:6935-6960. [PMID: 30226509 DOI: 10.1039/c8ob01756e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The vioprolides are novel depsipeptides that have not been synthesized. However, they have been identified as important targets for synthesis because of their novel biological activities and challenging chemical structures. Following early work on the synthesis of a modified tetrapeptide that contained both the (E)-dehydrobutyrine and thiazoline components of vioprolide D, problems were encountered in taking an (E)-dehydrobutyrine containing intermediate further into the synthesis. A second approach to vioprolides and analogues was therefore investigated in which (E)- and (Z)-dehydrobutyrines were to be introduced by selenoxide elimination very late in the synthesis. A convergent approach to advanced macrocyclic precursors of the vioprolides was then completed using a modified hexapeptide and a dipeptidyl glycerate. In this work, it was necessary to protect the 2-hydroxyl group of the glycerate as its acetate and not as its 2,2,2-trichloroethoxycarbonate. Preliminary studies were carried out on the introduction of the required dehydrobutyrine and thiazoline components into advanced intermediates.
Collapse
Affiliation(s)
- Eibhlin Butler
- The School of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | | | | | | | | | | | | |
Collapse
|
6
|
Total Synthesis and Stereochemical Assignment of Nostosin B. Mar Drugs 2017; 15:md15030058. [PMID: 28264450 PMCID: PMC5367015 DOI: 10.3390/md15030058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 02/22/2017] [Indexed: 02/04/2023] Open
Abstract
Nostosins A and B were isolated from a hydrophilic extract of Nostoc sp. strain from Iran, which exhibits excellent tryps inhibitory activity. Nostosin A was the most potent natural tripeptide aldehyde as trypsin inhibitor up to now. Both R- and S-2-hydroxy-4-(4-hydroxy-phenyl) butanoic acid (Hhpba) were prepared and incorporated into the total synthesis of nostosin B, respectively. Careful comparison of the NMR spectra and optical rotation data of synthetic nostosin B (1a and 1b) with the natural product led to the unambiguous identification of the R-configuration of the Hhpba fragment, which was further confirmed by co-injection with the authentic sample on HPLC using both reversed phase column and the chiral AD-RH column.
Collapse
|
7
|
Liu J, Wang L, Zhang J, Xu Z, Ye T. The total synthesis and stereochemical assignment of scytonemin A. Chem Commun (Camb) 2016; 52:1002-5. [PMID: 26593048 DOI: 10.1039/c5cc08324a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The total synthesis of scytonemin A and its C-9 epimer, as well as elucidation of the absolute stereochemistry of natural scytonemin A is described.
Collapse
Affiliation(s)
- Junyang Liu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China. and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Lei Wang
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China.
| | - Juefei Zhang
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China.
| | - Zhengshuang Xu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China.
| | - Tao Ye
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen, 518055, China. and Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| |
Collapse
|
8
|
Abstract
Cathepsins are proteases found in all animals as well as other organisms. There are approximately a dozen members of this family, which are distinguished by their structure, their catalytic mechanism, and which proteins they cleave. Most of the members become activated at the low pH found in lysosomes. Cathepsins have been identified as therapeutic targets in the search for new drugs against a number of human pathologies, including cancer, Alzheimer's, and osteoporosis. A number of natural products have been reported as selective inhibitors of some cathepsins. Chemical structure of natural products as inhibitors of cathepsins can be very diverse. Some peptidic natural products are inhibitors of the cysteine protease cathepsins such as E-64 isolated from Aspergillus, which is a cathepsin B inhibitor, or more recently the marine cyanobacterial metabolite gallinamide A which is a selective inhibitor of human cathepsin L. Also amino acid derivatives have been reported as inhibitors of cathepsin A. Other natural products include chalcone natural products possessing cytotoxic activities against prostate cancer cells and inhibiting cysteine cathepsins in vitro, antipain and its analogues isolated from Streptomyces as inhibitors of cathepsin K, and natural biflavones as novel inhibitors of cathepsins B and K. In this review we will report the most representative examples of natural products as inhibitors of cathepsins, especially the ones reported during the last decade.
Collapse
|
9
|
Prabhu G, Nagendra G, Sagar NR, Pal R, Guru Row TN, Sureshbabu VV. A Facile Synthesis of 1,5-Disubstituted Tetrazole Peptidomimetics by Desulfurization/Electrocyclization of Thiopeptides. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500384] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Girish Prabhu
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| | - Govindappa Nagendra
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| | - N. R. Sagar
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| | - Rumpa Pal
- Solid State and Structural Chemistry Unit; Indian Institute of Science; Bangalore 560 012 India
| | - Tayur N. Guru Row
- Solid State and Structural Chemistry Unit; Indian Institute of Science; Bangalore 560 012 India
| | - Vommina V. Sureshbabu
- #109, Peptide Research Laboratory; Department of Studies in Chemistry; Central College Campus, Dr. B. R. Ambedkar Veedhi; Bangalore University; Bangalore 560001 India
| |
Collapse
|
10
|
Abstract
Total synthesis of the cyanobacterial metabolite largamide B and the disproval of its originally assigned stereochemistry as well as confirmation of the revised stereochemistry are reported.
Collapse
Affiliation(s)
- Shiwei Qu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town, Xili, Shenzhen 518055, China.
| | | | | | | | | | | |
Collapse
|
11
|
Wang X, Lv C, Feng J, Tang L, Wang Z, Liu Y, Meng Y, Ye T, Xu Z. Studies toward the total synthesis of Itralamide B and biological evaluation of its structural analogs. Mar Drugs 2015; 13:2085-104. [PMID: 25871289 PMCID: PMC4413201 DOI: 10.3390/md13042085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 03/17/2015] [Accepted: 03/30/2015] [Indexed: 11/16/2022] Open
Abstract
Itralamides A and B were isolated from the lipophilic extract of Lyngbya majuscula collected from the eastern Caribbean. Itralamide B (1) showed cytotoxic activity towards human embryonic kidney cells (HEK293, IC50 = 6 μM). Preliminary studies disapproved the proposed stereochemistry of itralamide. In this paper, we will provide a full account of the total synthesis of four stereoisomers of itralamide B and the results derived from biological tests of these structural congeners.
Collapse
Affiliation(s)
- Xiaoji Wang
- School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
| | - Chanshan Lv
- School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen 518055, China.
| | - Junmin Feng
- School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen 518055, China.
| | - Linjun Tang
- School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen 518055, China.
| | - Zhuo Wang
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Yuqing Liu
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Yi Meng
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen 518055, China.
| | - Tao Ye
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Zhengshuang Xu
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen 518055, China.
| |
Collapse
|
12
|
Tsakos M, Schaffert ES, Clement LL, Villadsen NL, Poulsen TB. Ester coupling reactions – an enduring challenge in the chemical synthesis of bioactive natural products. Nat Prod Rep 2015; 32:605-32. [DOI: 10.1039/c4np00106k] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In this review we investigate the use of complex ester fragment couplings within natural product total syntheses. Using examples from the literature up to 2014 we illustrate the state-of-the-art as well as the challenges within this area of organic synthesis.
Collapse
Affiliation(s)
- Michail Tsakos
- Chemical Biology Laboratory
- Department of Chemistry
- Aarhus University
- Aarhus C
- Denmark
| | - Eva S. Schaffert
- Chemical Biology Laboratory
- Department of Chemistry
- Aarhus University
- Aarhus C
- Denmark
| | - Lise L. Clement
- Chemical Biology Laboratory
- Department of Chemistry
- Aarhus University
- Aarhus C
- Denmark
| | - Nikolaj L. Villadsen
- Chemical Biology Laboratory
- Department of Chemistry
- Aarhus University
- Aarhus C
- Denmark
| | - Thomas B. Poulsen
- Chemical Biology Laboratory
- Department of Chemistry
- Aarhus University
- Aarhus C
- Denmark
| |
Collapse
|
13
|
Song L, Liu J, Gui H, Hui C, Zhou J, Guo Y, Zhang P, Xu Z, Ye T. Synthesis of the Macrocyclic Core of Rhizopodin. Chem Asian J 2013; 8:2955-9. [DOI: 10.1002/asia.201300802] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Indexed: 01/28/2023]
|
14
|
Liu H, Liu Y, Wang Z, Xing X, Maguire AR, Luesch H, Zhang H, Xu Z, Ye T. Total synthesis and biological evaluation of grassypeptolide A. Chemistry 2013; 19:6774-84. [PMID: 23536467 DOI: 10.1002/chem.201203667] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Revised: 02/18/2013] [Indexed: 01/08/2023]
Abstract
Herein, we describe in full our investigations into the synthesis of grassypeptolide A (1) in 17 linear steps with an overall yield of 11.3 %. In particular, this work features the late-stage introduction of sensitive bis(thiazoline) heterocycles and 31-membered macrocyclization conducted at the sterically congested secondary amide site in superb conversion (72 % yield). Biological evaluation indicated that grassypeptolide A significantly inhibited cancer cell proliferation in a dose-dependent manner. It induced cancer cell apoptosis, which was associated with increased cleavage of poly(ADP-ribose) polymerase (PARP) and decreased expression of bcl-2 and bcl-xL. Furthermore, grassypeptolide A also caused cell cycle redistribution by increasing cells in the G1 phase and decreasing cells in the S and G2 phases. In addition, cell cycle arrest was correlated with downregulation of cyclin D and upregulation of p27 and p21.
Collapse
Affiliation(s)
- Hui Liu
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen 518055, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Long B, Tang S, Chen L, Qu S, Chen B, Liu J, Maguire AR, Wang Z, Liu Y, Zhang H, Xu Z, Ye T. Total synthesis of padanamides A and B. Chem Commun (Camb) 2013; 49:2977-9. [PMID: 23446820 DOI: 10.1039/c3cc00178d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
The first total syntheses of padanamides A and B have been achieved, unambiguously confirming their structures.
Collapse
Affiliation(s)
- Bohua Long
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
|
17
|
|
18
|
Dai L, Chen B, Lei H, Wang Z, Liu Y, Xu Z, Ye T. Total synthesis and stereochemical revision of lagunamide A. Chem Commun (Camb) 2012; 48:8697-9. [PMID: 22824869 DOI: 10.1039/c2cc34187e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A revised configurational assignment for the marine metabolite lagunamide A is proposed and validated by total synthesis.
Collapse
Affiliation(s)
- Lu Dai
- Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, 518055, China
| | | | | | | | | | | | | |
Collapse
|
19
|
Vishwanatha TM, Narendra N, Chattopadhyay B, Mukherjee M, Sureshbabu VV. Synthesis of Selenoxo Peptides and Oligoselenoxo Peptides Employing LiAlHSeH. J Org Chem 2012; 77:2689-702. [DOI: 10.1021/jo2024703] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- T. M. Vishwanatha
- Peptide Research Laboratory,
Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore
560001, India
| | - N. Narendra
- Peptide Research Laboratory,
Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore
560001, India
| | - Basab Chattopadhyay
- Department
of Solid State Physics, Indian Association for the Cultivation of Science,
Jadavpur, Kolkata 700032, India
| | - Monika Mukherjee
- Department
of Solid State Physics, Indian Association for the Cultivation of Science,
Jadavpur, Kolkata 700032, India
| | - Vommina V. Sureshbabu
- Peptide Research Laboratory,
Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore
560001, India
| |
Collapse
|
20
|
Wang M, Feng X, Cai L, Xu Z, Ye T. Total synthesis and absolute configuration of nocardioazine B. Chem Commun (Camb) 2012; 48:4344-6. [DOI: 10.1039/c2cc31025b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
21
|
Abstract
Covering: 2010. Previous review: Nat. Prod. Rep., 2011, 28, 196. This review covers the literature published in 2010 for marine natural products, with 895 citations (590 for the period January to December 2010) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1003 for 2010), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
Collapse
Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | | | | | | | | |
Collapse
|
22
|
Abstract
Hoiamide C was synthesized in 16 steps with an overall yield of 1.8% starting from homoallylic alcohol 18, unambiguously confirming its structure.
Collapse
Affiliation(s)
- Lei Wang
- Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, University Town of Shenzhen, Xili, Nanshan District, Shenzhen, China
| | | | | |
Collapse
|