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Fairchild ME, Noble A, Aggarwal VK. Diastereodivergent Synthesis of Cyclopentyl Boronic Esters Bearing Contiguous Fully Substituted Stereocenters. Angew Chem Int Ed Engl 2022; 61:e202205816. [PMID: 35639345 PMCID: PMC9542923 DOI: 10.1002/anie.202205816] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Indexed: 01/02/2023]
Abstract
The synthesis of molecules bearing two or more contiguous, quaternary stereocenters is challenging, owing to the difficulty in controlling stereochemistry whilst simultaneously constructing a sterically congested motif. Herein, we report the electrophile-induced ring contractive 1,2-metallate rearrangement of 6-membered cyclic alkenyl boronate complexes for the synthesis of cyclopentyl boronic esters bearing two contiguous, fully substituted stereocenters with high levels of stereocontrol. Remarkably, simple variation of the reaction solvent enabled their diastereodivergent construction with facile access to complementary diastereomeric pairs. The utility of our methodology is demonstrated in the asymmetric total synthesis of (+)-herbertene-1,14-diol.
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Affiliation(s)
| | - Adam Noble
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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2
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Fairchild ME, Noble A, Aggarwal VK. Diastereodivergent Synthesis of Cyclopentyl Boronic Esters Bearing Contiguous Fully Substituted Stereocenters. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Molly E. Fairchild
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Adam Noble
- School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS UK
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3
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Yan J, Zhou Z, He Q, Chen G, Wei H, Xie W. The applications of catalytic asymmetric halocyclization in natural product synthesis. Org Chem Front 2022. [DOI: 10.1039/d1qo01395e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Catalytic asymmetric halocyclization of olefinic substrate has evolved rapidly and been well utilized as a practical strategy for constructing enantioenriched cyclic skeletons in natural product synthesis.
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Affiliation(s)
- Jiahang Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Zhiqiang Zhou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Qiaoqiao He
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Guzhou Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
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4
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Hu J, Ji K, Yan L, Yang S, Li Y, Wen W, Chen L, Wu X, Hu Y, Xie W. A concise synthesis of herbertenolide. Org Biomol Chem 2022; 20:2205-2208. [DOI: 10.1039/d2ob00041e] [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
A concise synthesis of (±)-herbertenolide has been accomplished herein. The strategy relies on a H2O2-mediated oxidative ring contraction of all-substituted cyclic α-formyl ketones for the stereospecific construction of contiguous quaternary...
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5
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Liu SG, Zhang CY, Zhou JC, Han JJ, Zhu MZ, Zhang JZ, Li Y, Xu ZJ, Meng H, Wang X, Zong Y, Yuan SZ, Qiao YN, Tang YJ, Lou HX. Diels–Alder adducts of a labdane diterpenoid from the Chinese liverwort Pallavicinia subciliata. Org Chem Front 2022. [DOI: 10.1039/d1qo01891d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A 7,8-seco-2,8-cyclolabdane diterpenoid, pallasubcin A (1), and three pallasubcin A-derived dimers, pallasubcins B–D (2–4), formed via a Diels–Alder reaction, were isolated from the Chinese liverwort Pallavicinia subciliata.
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Affiliation(s)
- Shu-Gong Liu
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Chun-Yang Zhang
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Jin-Chuan Zhou
- School of Pharmacy, Linyi University, Linyi 276000, P. R. China
| | - Jing-Jing Han
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Ming-Zhu Zhu
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Jiao-Zhen Zhang
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Yi Li
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Ze-Jun Xu
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Hui Meng
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Xue Wang
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Yan Zong
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Shuang-Zhi Yuan
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Ya-Nan Qiao
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
| | - Ya-Jie Tang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, P. R. China
| | - Hong-Xiang Lou
- Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmacy, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, P.R. China
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6
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Gan WE, Cao J, Xu LW. Palladium-catalyzed enantioselective domino ring-opening/Hiyama coupling of cyclobutanones: development and application to the synthesis of (+)-herbertene-1,14-diol. Org Chem Front 2022. [DOI: 10.1039/d2qo01239a] [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
A palladium-catalyzed enantioselective domino ring-opening/Hiyama coupling of cyclobutanones is reported, providing chiral 1-indanones bearing a versatile alkenyl group.
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Affiliation(s)
- Wan-Er Gan
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, P. R. China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, P. R. China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Key Laboratory of Organosilicon Material Technology of Zhejiang Province, College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute and Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, P. R. China
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7
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Fujioka H. Development of New Innovative Synthetic Organic Chemistry Using Lone Pairs of Oxygen Atoms. Chem Pharm Bull (Tokyo) 2020; 68:907-945. [PMID: 32999145 DOI: 10.1248/cpb.c20-00178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Oxygen atoms have a lone pair of electrons, so they have high chelation ability, high nucleophilic ability, stabilizing ability of adjacent cations, and take a chelate or oxocarbenium ion structure with Lewis acids and metals. I took advantage of these properties to develop three new reactions, 1) asymmetric synthesis of chiral quaternary carbon centers, 2) asymmetric synthesis using acetal functions, and 3) organic chemistry using acetal-type reactive salt chemical species, and applied them to biologically active natural products synthesis. New reactions described here are all innovative and useful for natural products synthesis. In particular, the first asymmetric synthesis of fredericamycin A, and concise asymmetric synthesis of anthracycline antibiotics, scyphostatin, (+)-Sch 642305, (-)-stenine, clavolonine, (+)-rubrenolide, (+)-rubrynolide, (+)-centrolobine, and decytospolide A and B, etc., are noteworthy. Furthermore, since reactions using acetal-type reactive salt chemical species allow the coexistence of functional groups that normally cannot coexist, the reactions using reactive salts have potential to change the retrosynthesis planned based on conventional reactions.
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Affiliation(s)
- Hiromichi Fujioka
- The Institute of Scientific and Industrial Research, Osaka University
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8
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Hu F, Zhou Q, Cao F, Chu WD, He L, Liu QZ. Enantioselective Formal [4+1] Cycloaddition of Diazoarylacetates and the Danishefsky's Diene: Stereoselective Synthesis of (-)-1,13-Herbertenediol. J Org Chem 2018; 83:12806-12814. [PMID: 30215518 DOI: 10.1021/acs.joc.8b01546] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rodium chiral diene complex-catalyzed enantioselective cycloaddition of aryl α-diazoarylacetates and electron-enriched Danishefsky-type dienes afforded highly functionalized and optically enriched cyclopentenones in excellent yields (up to 97% yield) and with good to excellent enantioselectivities (60-92% ee). (-)-1,13-Herbertenediol was successfully synthesized in an overall 25% yield employing the optically enriched cyclopentenone with an all-carbon quaternary center as the key intermediate.
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Affiliation(s)
- Fang Hu
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No 1, Shida Road , Nanchong 637002 , People's Republic of China
| | - Qing Zhou
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No 1, Shida Road , Nanchong 637002 , People's Republic of China
| | - Fei Cao
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No 1, Shida Road , Nanchong 637002 , People's Republic of China
| | - Wen-Dao Chu
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No 1, Shida Road , Nanchong 637002 , People's Republic of China
| | - Long He
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No 1, Shida Road , Nanchong 637002 , People's Republic of China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control, Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering , China West Normal University , No 1, Shida Road , Nanchong 637002 , People's Republic of China
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9
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McAtee CC, Ellinwood DC, McAtee RC, Schindler CS. Functionalized Cyclopentanes via Sc(III)-Catalyzed Intramolecular Enolate Alkylation. Tetrahedron 2018; 74:3306-3313. [PMID: 30262933 PMCID: PMC6152925 DOI: 10.1016/j.tet.2018.04.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report herein the intramolecular α-tert-alkylation of unsaturated β-ketoesters which gives rise to highly functionalized cyclopentanes. This strategy is characterized by its operational simplicity, mild reaction conditions and the use of scandium(III) triflate as a Lewis acid catalyst. Of interest, cyclopentanes bearing heterocycles, sites for post reaction functionalization and spirocyclic architectures are accessible with this strategy.
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Affiliation(s)
- Christopher C McAtee
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avee, Ann Arbor, MI, 48109, USA
| | - Duncan C Ellinwood
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avee, Ann Arbor, MI, 48109, USA
| | - Rory C McAtee
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avee, Ann Arbor, MI, 48109, USA
| | - Corinna S Schindler
- University of Michigan, Department of Chemistry, Willard Henry Dow Laboratory, 930 North University Avee, Ann Arbor, MI, 48109, USA
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10
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Zhou JY, Ma C, Zhang YZ, Wu Q, Shi F. Catalyst-free [4 + 2] cyclization of para-quinone methide derivatives with homophthalic anhydrides. Org Biomol Chem 2018; 16:9382-9389. [DOI: 10.1039/c8ob02776e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A catalyst-free [4 + 2] cyclization of para-quinone methide derivatives with homophthalic anhydrides has been established, which is used for constructing dihydrocoumarin frameworks in generally good yields (up to 99%) and high diastereoselectivities (up to >95 : 5 dr).
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Affiliation(s)
- Jia-Yu Zhou
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Chun Ma
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Yi-Zhu Zhang
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Qiong Wu
- School of Chemistry and Chemical Engineering
- Xuzhou University of Technology
- Xuzhou 221018
- China
| | - Feng Shi
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou
- China
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11
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Zhang T, Ma C, Zhou JY, Mei GJ, Shi F. Application of Homophthalic Anhydrides as 2C Building Blocks in Catalytic Asymmetric Cyclizations of ortho
-Quinone Methides: Diastereo- and Enantioselective Construction of Dihydrocoumarin Frameworks. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701333] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ting Zhang
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 People's Republic of China
| | - Chun Ma
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 People's Republic of China
| | - Jia-Yu Zhou
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 People's Republic of China
| | - Guang-Jian Mei
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 People's Republic of China
| | - Feng Shi
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 People's Republic of China
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12
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Liao SG, Yue JM. Dimeric Sesquiterpenoids. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 101 2016; 101:1-112. [DOI: 10.1007/978-3-319-22692-7_1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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13
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Zhu DY, Xu MH, Tu YQ, Zhang FM, Wang SH. Catalytic Asymmetric Construction of α-Quaternary Cyclopentanones and Its Application to the Syntheses of (−)-1,14-Herbertenediol and (−)-Aphanorphine. Chemistry 2015; 21:15502-5. [DOI: 10.1002/chem.201502700] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Indexed: 11/10/2022]
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14
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Kamat DP, Tilve SG, Kamat VP, Kirtany JK. Syntheses and Biological Activities of Chroman-2-ones. A Review. ORG PREP PROCED INT 2015. [DOI: 10.1080/00304948.2015.983805] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Hong BC, Chen ZY, Chen WH, Sun HI, Lee GH. Traceless Solid-Phase Synthesis of Cyclopenta[c]quinolines and Cyclopenta[c]chromenes via Hetero [6+3] Cycloadditions of Fulvene. A Facile Approach to the 11-Heterosteroids Framework. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200500028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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16
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Liu N, Guo DX, Wang SQ, Wang YY, Zhang L, Li G, Lou HX. Bioactive sesquiterpenoids and diterpenoids from the liverwort Bazzania albifolia. Chem Biodivers 2013; 9:2254-61. [PMID: 23081925 DOI: 10.1002/cbdv.201100408] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
One undescribed 6,7-secofusicoccane-type diterpene, albifolione (1), and one new aromadendrane-type sesquiterpenoid ketone, methyl 2-oxoaromadendra-1(10),3-dien-12-oate (2), along with four known compounds, δ-cuparenol (3), fusicoauritone (4), chiloscyphenols A and B (5 and 6, resp.), were isolated from the liverwort Bazzania albifolia Horik. The structures and relative configurations of 1 and 2 were established unequivocally on the basis of spectroscopic data analysis. Preliminary bioassay revealed that compound 5 showed quite strong cytotoxicity against the human tumor cell line MCF-7, with an IC(50) value of 5.6 μM.
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Affiliation(s)
- Na Liu
- Department of Natural Products Chemistry, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, PR China
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17
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Jeong J, Lee J, Rhee YH. Formal Synthesis of Racemic Herbertene, α-Herbertenol, β-Herbertenol and Herbertenone via Gold(I)-Catalyzed Cyclization of 5-Phenyl-5-siloxy-3-en-1-ynes. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.1.303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Asakawa Y, Ludwiczuk A. Distribution of Cyclic and Acyclic Bis-bibenzyls in the Marchantiophyta (Liverworts), Ferns and Higher Plants and Their Biological Activities, Biosynthesis, and Total Synthesis. HETEROCYCLES 2012. [DOI: 10.3987/rev-12-sr(n)5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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20
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Cytotoxic, radical scavenging and antimicrobial activities of sesquiterpenoids from the Tahitian liverwort Mastigophora diclados (Brid.) Nees (Mastigophoraceae). J Nat Med 2010; 64:417-22. [DOI: 10.1007/s11418-010-0423-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Accepted: 03/29/2010] [Indexed: 10/19/2022]
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21
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PPh3-catalyzed ylide cyclization for the controllable synthesis of benzobicyclo[4.3.0] compounds: base effects and scope. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.11.052] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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22
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Srikrishna A, Ratna Kumar S, Ravikumar PC. Synthesis of (±)‐12‐Methoxyherbertenediol Dimethyl Ether. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910701574577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Srikrishna A, Ravikumar P. Structure revision of HM-3, an aromatic sesquiterpene isolated from the phytopathogenic fungus Helicobasidium mompa. First total syntheses of HM-3 and HM-4. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.07.062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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25
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Srikrishna A, Ravikumar P. Total synthesis of HM-1 and HM-2, aromatic sesquiterpenes isolated from the phytopathogenic fungus Helicobasidium mompa. Structure revision of HM-2. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.06.156] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Srikrishna A, Vasantha Lakshmi B. Construction of vicinal quaternary carbon atoms by Ireland ester Claisen rearrangement: total synthesis of (±)-herbertenolide, (±)-herberteneacetal, (±)-herbertene-1,14-diol and (±)-herbertene-1,15-diol. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.05.065] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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27
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Chavan SP, Thakkar M, Kharul RK, Pathak AB, Bhosekar GV, Bhadbhade MM. First enantiospecific synthesis of (+)-β-herbertenol. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.01.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Acherar S, Audran G, Fotiadu F, Monti H. Lipase-Promoted Access to Phenolic Herbertane-Type Sesquiterpenes: (+)-1,14-Herbertenediol, (?)-?-Herbertenol, (?)-Herbertenediol and Their Enantiomers. European J Org Chem 2004. [DOI: 10.1002/ejoc.200400395] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Mondal S, Mukherjee M, Paul T, Mukherjee D. Synthesis, spectroscopic and crystallographic studies of (1RS,2SR)-1-(2-carboxy-4-methyl-5-methoxyphenyl)-1,2-dimethyl-cyclopentane-2-carboxylic acid: supramolecular framework built from O—H…O and C—H…O hydrogen bonds. Z KRIST-CRYST MATER 2004. [DOI: 10.1524/zkri.219.7.456.35642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The bicyclic carboxylic acid, C17H22O5, a potential intermediate in the synthesis of bioactive δ-cuparenol has been prepared and characterized by spectroscopic and X-ray studies. The structure derived from the NMR data, the infrared spectra and the chemical analysis is consistent with that of single crystal X-ray analysis. The molecules in the title compound are linked into a three dimensional framework by O—H…O and C—H…O intermolecular hydrogen bonds. The supramolecular assembly of molecules exhibits R4
4(23) rings. The conformational analysis of the molecule as investigated by the semi-empirical quantum mechanical AM1 calculations shows a good agreement with the X-ray structure.
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30
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Asakawa Y. Chemosystematics of the hepaticae. PHYTOCHEMISTRY 2004; 65:623-669. [PMID: 15016562 DOI: 10.1016/j.phytochem.2004.01.003] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2003] [Revised: 12/12/2003] [Indexed: 05/24/2023]
Abstract
Most liverworts (Hepaticae) contain oil bodies which are composed of lipophilic terpenoids and aromatic compounds. The chemosystematics of 36 families of the Jungermannidae and seven families of the Marchantiidae of the Hepaticae are discussed using terpenoid and aromatic components.
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Affiliation(s)
- Yoshinori Asakawa
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 770-8514, Japan.
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Harinantenaina L, Asakawa Y. Chemical Constituents of Malagasy Liverworts, Part II: Mastigophoric Acid Methyl Ester of Biogenetic Interest from Mastigophora diclados (Lepicoleaceae Subf. Mastigophoroideae). Chem Pharm Bull (Tokyo) 2004; 52:1382-4. [PMID: 15516770 DOI: 10.1248/cpb.52.1382] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the course of our chemotaxonomic study of the liverworts growing in Madagascar, mastigophoric acid methyl ester, along with eleven known compounds were isolated from Mastigophora diclados. Isolated metabolites showed that the Malagasy Mastigophora is more related to the samples from Borneo and Japan than to the Taiwanese or Malaysian ones. The biosynthesis of the herbertane type sesquiterpenoids from Mastigophora diclados is suggested to be similar to those found in the genus Herbertus. The herbertane-type sesquiterpenoids were screened for Staphylococcus aureus strain inhibition.
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Affiliation(s)
- Liva Harinantenaina
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima 770-8514, Japan
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Kita Y, Futamura J, Ohba Y, Sawama Y, Ganesh JK, Fujioka H. The rearrangement of 2,3-epoxysulfonates and its application to natural products syntheses: formal synthesis of (-)-aphanorphine and total syntheses of (-)-alpha-herbertenol and (-)-herbertenediol. J Org Chem 2003; 68:5917-24. [PMID: 12868926 DOI: 10.1021/jo034573g] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Lewis acid treatment of 2,3-epoxysulfonates with 2,3-dialkyl substituents or 2-alkyl-3-aryl substituents produced the rearrangement products via C3-cleavage of the oxirane ring in high yields. On the other hand, 2-aryl-3-alkyl-2,3-epoxysulfonates produced the products via C2-cleavage of the oxirane ring. The sulfonyloxy groups of the alpha-sulfonyloxy ketones, having a chiral benzylic quaternary carbon center obtained by the rearrangement of 2-alkyl-3-aryl-2,3-epoxysulfonates, were reductively eliminated to give the ketones with a chiral benzylic quaternary carbon center. The method was applied to the formal synthesis of (-)-aphanorphine and total syntheses of (-)-alpha-herbertenol and (-)-herbertenediol.
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Affiliation(s)
- Yasuyuki Kita
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan.
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Stereoselective total syntheses of (±)-1,14-herbertenediol and (±)-tochuinyl acetate and facile total syntheses of (±)-α-herbertenol, (±)-β-herbertenol and (±)-1,4-cuparenediol. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(02)02674-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Srikrishna A, Rao M. A simple, ring-closing metathesis reaction based approach to (±)-1,14-herbertenediol and (±)-11-epi-herbertenolide. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(01)02051-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fukuyama Y, Yuasa H, Tonoi Y, Harada K, Wada M, Asakawa Y, Hashimoto T. First syntheses of 1,13- and 1,15-dihydroxyherbertenes, and herbertenolide by applying intramolecular Heck reaction for the construction of adjacent quaternary centers. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00932-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Asakawa Y. Recent advances in phytochemistry of bryophytes-acetogenins, terpenoids and bis(bibenzyl)s from selected Japanese, Taiwanese, New Zealand, Argentinean and European liverworts. PHYTOCHEMISTRY 2001; 56:297-312. [PMID: 11243454 DOI: 10.1016/s0031-9422(00)00454-4] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Bryophytes contain a large number of terpenoids and phenolic compounds. Recent topics relating to the chemical constituents found in 36 Japanese, 3 New Zealand, 2 European, 1 Argentinean and 1 Taiwanese liverworts and 2 Japanese mosses and their biological activity are discussed. The chemosystematics of some liverworts as well as the chemical relationship between liverworts and mosses, and bryophytes and ferns are also discussed.
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Affiliation(s)
- Y Asakawa
- Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Japan.
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