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Liu X, Poddar S, Song L, Hendrickson H, Zhang X, Yuan Y, Zhou D, Zheng G. Synthesis and Liver Microsomal Metabolic Stability Studies of a Fluorine-Substituted δ-Tocotrienol Derivative. ChemMedChem 2020; 15:506-516. [PMID: 31957223 DOI: 10.1002/cmdc.201900676] [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: 12/04/2019] [Revised: 01/11/2020] [Indexed: 11/10/2022]
Abstract
A fluoro-substituted δ-tocotrienol derivative, DT3-F2, was synthesized. This compound was designed to stabilize the metabolically labile terminal methyl groups of δ-tocotrienol by replacing one C-H bond on each of the two methyl groups with a C-F bond. However, in vitro metabolic stability studies using mouse liver microsomes revealed an unexpected rapid enzymatic C-F bond hydrolysis of DT3-F2. To the best of our knowledge, this is the first report of an unusual metabolic hydrolysis of allylic C-F bonds.
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Affiliation(s)
- Xingui Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.,Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Saikat Poddar
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Lin Song
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Howard Hendrickson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.,Department of Pharmaceutical, Social and Administrative Sciences, School of Pharmacy, Samford University, Birmingham, AL 35229, USA
| | - Xuan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.,Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Yaxia Yuan
- Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Daohong Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.,Department of Pharmacodynamics, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
| | - Guangrong Zheng
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.,Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
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Kaur N, Ahlawat N, Verma Y, Grewal P, Bhardwaj P, Jangid NK. Metal and organo-complex promoted synthesis of fused five-memberedO-heterocycles. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1700522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Navjeet Kaur
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Neha Ahlawat
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Yamini Verma
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pooja Grewal
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
| | - Pranshu Bhardwaj
- Department of Chemistry, Banasthali Vidyapith, Banasthali, India
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3
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Feng Y, Liu J, Carrasco YP, MacMillan JB, De Brabander JK. Rifamycin Biosynthetic Congeners: Isolation and Total Synthesis of Rifsaliniketal and Total Synthesis of Salinisporamycin and Saliniketals A and B. J Am Chem Soc 2016; 138:7130-42. [DOI: 10.1021/jacs.6b03248] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yu Feng
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Jun Liu
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Yazmin P. Carrasco
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - John B. MacMillan
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
| | - Jef K. De Brabander
- Department of Biochemistry and ‡Harold C. Simmons Comprehensive
Cancer Center, The University of Texas Southwestern Medical Center at Dallas, 5323 Harry
Hines Boulevard, Dallas, Texas 75390-9038, United States
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4
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Qi C, Xiong Y, Eschenbrenner-Lux V, Cong H, Porco JA. Asymmetric Syntheses of the Flavonoid Diels-Alder Natural Products Sanggenons C and O. J Am Chem Soc 2016; 138:798-801. [PMID: 26735066 PMCID: PMC4863937 DOI: 10.1021/jacs.5b12778] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Metal-catalyzed, double Claisen rearrangement of a bis-allyloxyflavone has been utilized to enable a concise synthesis of the hydrobenzofuro[3,2-b]chromenone core structure of the natural products sanggenon A and sanggenol F. In addition, catalytic, enantioselective [4+2] cycloadditions of 2'-hydroxychalcones have been accomplished using B(OPh)3/BINOL complexes. Asymmetric syntheses of the flavonoid Diels-Alder natural products sanggenons C and O have been achieved employing a stereodivergent reaction of a racemic mixture (stereodivergent RRM) involving [4+2] cycloaddition.
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Affiliation(s)
| | | | - Vincent Eschenbrenner-Lux
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - Huan Cong
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
| | - John A. Porco
- Department of Chemistry and Center for Molecular Discovery (BU-CMD), Boston University, Boston, Massachusetts 02215, United States
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5
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Negishi EI, Xu S. Syntheses of Chiral Heterocyclic Compounds via Zirconium-Catalyzed Asymmetric Carboalumination of Alkynes (ZACA Reaction). HETEROCYCLES 2014. [DOI: 10.3987/rev-13-sr(s)5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Narender T, Venkateswarlu K, Madhur G, Reddy KP. Highly Efficient and Selective Deprotection Method for Prenyl, Geranyl, and Phytyl Ethers and Esters Using Borontrifluoride–Etherate. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2011.589561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- T. Narender
- a Medicinal and Process Chemistry Division, Central Drug Research Institute , Lucknow , India
| | - K. Venkateswarlu
- a Medicinal and Process Chemistry Division, Central Drug Research Institute , Lucknow , India
| | - G. Madhur
- a Medicinal and Process Chemistry Division, Central Drug Research Institute , Lucknow , India
| | - K. Papi Reddy
- a Medicinal and Process Chemistry Division, Central Drug Research Institute , Lucknow , India
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Wang Y, Xing Y, Zhang Q, O'Doherty GA. De novo synthesis of natural products via the asymmetric hydration of polyenes. Chem Commun (Camb) 2011; 47:8493-505. [PMID: 21559534 PMCID: PMC5815319 DOI: 10.1039/c1cc11791b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
For the last ten years our group has been working toward the development of an asymmetric hydration approach to polyketide natural products based on the regioselective hydration of di- and tri-enoates. Key to the success of this approach is the recognition that both high regiocontrol and asymmetric induction could be obtained by the use of a Sharpless asymmetric dihydroxylation reaction. Herein we describe the development of the method and its application to natural product total synthesis.
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Affiliation(s)
- Yanping Wang
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, USA
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Zhao JH, Xu XJ, Ji MH, Cheng JL, Zhu GN. Design, synthesis, and biological activities of milbemycin analogues. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:4836-4850. [PMID: 21452899 DOI: 10.1021/jf2001926] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Milbemycins have received considerable interest in agricultural chemistry due to a special action mode, extremely high activity against arachnoide pests, low toxicity to mammals, and environmentally benign characteristics. Two series of novel milbemycin analogues (4Ia-6IIc) containing alkyl and aryl groups at the 4'- and 13-positions were designed and synthesized by five schemes. These analogues were identified by (1)H NMR, (13)C NMR, and elemental analysis (or HRMS). Their insecticidal activities against carmine spider mite, oriental armyworm, and black bean aphid were evaluated. The results showed that all of the title compounds had low acaricidal activity against carmine spider mite. However, most of them exhibited good insecticidal activities against oriental armyworm and black bean aphid at a concentration of 200 mg L(-1). The most potent substituents of 2,2-dimethylbutanoyl (4Ib), phenylacetyl (4IIm), and (Z)-1-(methoxyimino)-1-phenylacetyl (4IIn) exhibited the highest larvicidal activities, and its insecticidal LC(50) values against oriental armyworm were 0.250, 0.204, and 0.350 mg L(-1), while its insecticidal LC(50) values against black bean aphid were 0.150, 0.070, and 0.120 mg L(-1), respectively. These substituents provided some hints for further investigation on structure modification.
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Affiliation(s)
- Jin-Hao Zhao
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, People's Republic of China
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Eto M, Yamaguchi K, Yoshitake Y, Harano K. New formation mechanism of allylic trithiocarbonates from sodium O-(2-Alkenyl) dithiocarbonates via sequential pericyclic reactions: Density functional theory study. Chem Pharm Bull (Tokyo) 2010; 58:1517-20. [PMID: 21048346 DOI: 10.1248/cpb.58.1517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Density functional theory (DFT) calculations at the B3LYP/6-31G(d) level demonstrated that sodium O-(3-phenylallyl) dithiocarbonate undergoes [3,3]-sigmatropic rearrangement to sodium S-(1-phenylallyl) dithiocarbonate, which then isomerizes to the more thermodynamically stable sodium S-(3-phenylallyl) dithiocarbonate. The calculations also showed that sodium 2-alkenyl trithiocarbonates and their esters are more labile towards the allylic rearrangement.
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Affiliation(s)
- Masashi Eto
- Tokai University, Minami-Aso, Kumamoto, Japan
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14
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Shinkaruk S, Bennetau B, Babin P, Schmitter JM, Lamothe V, Bennetau-Pelissero C, Urdaci MC. Original preparation of conjugates for antibody production against Amicoumacin-related anti-microbial agents. Bioorg Med Chem 2008; 16:9383-91. [DOI: 10.1016/j.bmc.2008.08.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2008] [Revised: 07/31/2008] [Accepted: 08/04/2008] [Indexed: 10/21/2022]
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15
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Zhu G, Negishi EI. 1,4-Pentenyne as a Five-Carbon Synthon for Efficient and Selective Syntheses of Natural Products Containing 2,4-Dimethyl-1-penten-1,5-ylidene and Related Moieties by Means of Zr-Catalyzed Carboalumination of Alkynes and Alkenes. Chemistry 2007; 14:311-8. [DOI: 10.1002/chem.200701512] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Dzhemilev UM, Ibragimov AG. Metal complex catalysis in the synthesis of organoaluminium compounds. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc2000v069n02abeh000519] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Dzhemilev UM, Vostrikova OS, Tolstikov GA. Catalysis by metal complexes in organoaluminium synthesis. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1990v059n12abeh003584] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Nicolaou KC, Pihko PM, Bernal F, Frederick MO, Qian W, Uesaka N, Diedrichs N, Hinrichs J, Koftis TV, Loizidou E, Petrovic G, Rodriquez M, Sarlah D, Zou N. Total Synthesis and Structural Elucidation of Azaspiracid-1. Construction of Key Building Blocks for Originally Proposed Structure. J Am Chem Soc 2006; 128:2244-57. [PMID: 16478178 DOI: 10.1021/ja0547477] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Syntheses of the three key building blocks (65, 98, and 100) required for the total synthesis of the proposed structure of azaspiracid-1 (1a) are described. Key steps include a TMSOTf-induced ring-closing cascade to form the ABC rings of tetracycle 65, a neodymium-catalyzed internal aminal formation for the construction of intermediate 98, and a Nozaki-Hiyama-Kishi coupling to assemble the required carbon chain of fragment 100. The synthesized fragments, obtained stereoselectively in both their enantiomeric forms, were expected to allow for the construction of all four stereoisomers proposed as possible structures of azaspiracid-1 (1a-d), thus allowing the determination of both the relative and absolute stereochemistry of the natural product.
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Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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Hibino S, Nobuhiro J, Hirayama M, Choshi T, Kamoshita K, Maruyama S, Sukenaga Y, Ishizu T, Fujioka H. Synthesis of 6-Methylindole-4,7-quinone and Anti-tumor Activities of Its Related Indolequinones. HETEROCYCLES 2006. [DOI: 10.3987/com-06-s(w)48] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Hayes ME, Shinokubo H, Danheiser RL. Intramolecular [4 + 2] cycloadditions of benzynes with conjugated enynes, arenynes, and dienes. Org Lett 2005; 7:3917-20. [PMID: 16119931 PMCID: PMC2893022 DOI: 10.1021/ol051372l] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Benzynes generated by the reaction of o-(trimethylsilyl)aryl triflates with TBAT participate in intramolecular [4 + 2] cycloadditions with conjugated enynes, arenynes, and dienes to furnish highly condensed polycyclic aromatic compounds. [reaction: see text]
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Affiliation(s)
- Martin E. Hayes
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Hiroshi Shinokubo
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Rick L. Danheiser
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Harano K. [Cascade reactions of unsaturated xanthates and related reactions: computer-assisted molecular design and analysis of reaction mechanisms]. YAKUGAKU ZASSHI 2005; 125:469-89. [PMID: 15930816 DOI: 10.1248/yakushi.125.469] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Chugaev reaction provides access to olefins from alcohols without rearrangement through pyrolysis of O-alkyl S-alkyl dithiocarbonates (xanthates) via cis elimination. Xanthates having no beta-hydrogens undergo thione-to-thiol rearrangement to give S,S-dialkyl dithiocarbonates (thiolcarbonates). Based on these backgrounds, we intended to use the dithiolcarbonates as precursors of thiols. Xanthates could be converted to the corresponding dithiolcarbonates by Lewis-acid catalysis. Pyridine N-oxides and 4-dimethylaminopyridine also catalyzed the rearrangement reaction. On the other hand, O-(2-alkenyl) S-alkyl dithiocarbonates undergo [3,3]-sigmatropic rearrangement to give the allylically rearranged S-(2-alkenyl) S-alkyl dithiocarbonates. The homoallylic xanthates gave the corresponding dithiolcarbonates on heating with phenols. Pyrolysis of allylic dithiolcarbonates caused retro-ene type reaction to give the allylic sulfides in which allylic rearrangement also occurs. Coupling of these pericyclic reactions with intramolecular Diels-Alder reaction affords a one-pot synthetic method for the construction of hydroisobenzothiophenes. The mechanisms of the cascade and related reactions are demonstrated by location of the transition states using molecular orbital calculation method at various levels of theory involving density functional theory (DFT).
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Affiliation(s)
- Kazunobu Harano
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan.
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Andrus MB, Meredith EL, Hicken EJ, Simmons BL, Glancey RR, Ma W. Total Synthesis of (+)-Geldanamycin and (−)-o-Quinogeldanamycin: Asymmetric Glycolate Aldol Reactions and Biological Evaluation. J Org Chem 2003; 68:8162-9. [PMID: 14535799 DOI: 10.1021/jo034870l] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The total synthesis of (+)-geldanamycin (GA), following a linear route, has been completed using a demethylative quinone-forming reaction as the last step. Key steps include the use of two new asymmetric boron glycolate aldol reactions. To set the anti-C11,12 hydroxymethoxy functionality, (S,S)-5,6-bis-4-methoxyphenyldioxanone 8 was used. Methylglycolate derived from norephedrine 5 set the C6,7 methoxyurethane stereochemistry. The quinone formation step using nitric acid gave the non-natural o-quino-GA product 55 10:1 over geldanamycin. Other known oxidants gave an unusual azaquinone product 49. o-Quino-GA 55 binds Hsp90 with good affinity but is less cytotoxic compared to GA.
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Affiliation(s)
- Merritt B Andrus
- Brigham Young University, Department of Chemistry and Biochemistry, C100 BNSN, Provo, Utah 84602-5700, USA.
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Chavan SP, Kharul RK, Sharma AK, Chavan SP. An efficient and simple synthesis of (−)-wine lactone. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00511-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Concellón J, Bernad P, Pérez-Andrés J. Samarium-vermittelteβ-Eliminierung in Dihalogenalkoholen: diastereoselektive Synthese von (Z)-Vinylhalogeniden. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990816)111:16<2528::aid-ange2528>3.0.co;2-r] [Citation(s) in RCA: 16] [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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Konno T, Kitazume T. Synthesis of trifluoromethylated compounds with four consecutive asymmetric centers via sequential [3,3]-Ireland-Claisen rearrangement and iodolactonization. ACTA ACUST UNITED AC 1997. [DOI: 10.1016/s0957-4166(96)00492-2] [Citation(s) in RCA: 20] [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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Crimmins MT, Al-awar RS, Vallin IM, Hollis WG, O'Mahony R, Lever JG, Bankaitis-Davis DM. Asymmetric Total Synthesis of (+)-Milbemycin D. J Am Chem Soc 1996. [DOI: 10.1021/ja961071u] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael T. Crimmins
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Rima S. Al-awar
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Isabelle M. Vallin
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - W. Gary Hollis
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Rosemary O'Mahony
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - John G. Lever
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
| | - Danute M. Bankaitis-Davis
- Contribution from the Department of Chemistry, Venable and Kenan Laboratories of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290
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Nicolaou KC, Piscopio AD, Bertinato P, Chakraborty TK, Minowa N, Koide K. Total Synthesis of Rapamycin. Chemistry 1995. [DOI: 10.1002/chem.19950010509] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Barton DH, Parekh SI, Tse CL. On the stability and radical deoxygenation of tertairy xanthates. Tetrahedron Lett 1993. [DOI: 10.1016/s0040-4039(00)73548-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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32
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Hughes MJ, Thomas EJ. Milbemycin synthesis: synthesis of a macrocyclic analogue of non-aromatic β-milbemycins. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/p19930001493] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Fujiwara S, Smith AB. Avermectin-milbemycin synthetic studies. 6. Stereoselective elaboration of the “southern hemisphere” oxahydrindene. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)91891-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sulikowski MM, Davies GERE, Smith AB. Avermectin–milbemycin synthetic studies. Part 7. An approach to the southern hemisphere of milbemycin α1. ACTA ACUST UNITED AC 1992. [DOI: 10.1039/p19920000979] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ashworth P, Belagali SL, Casson S, Marczak A, Kocieński P. A method for the chromatographic resolution of tetrahydropyran-2-ones. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)80729-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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37
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Karim S, Parmee ER, Thomas EJ. Milbemycin synthesis: synthesis of 6β-hydroxy-3,4-dihydromilbemycin E. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)79699-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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