REACH: Improvement of Guidance Methods for the Identification and Evaluation of PM/PMT Substances
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(12) United States Patent DX
USOO7300.953B2 (12) United States Patent (10) Patent No.: US 7,300,953 B2 Nishino et al. (45) Date of Patent: Nov. 27, 2007 (54) PROCESS FOR PREPARING NITRILE JP 54-122220 A 9, 1979 COMPOUND, CARBOXYLIC ACID JP 59-51251. A 3, 1984 COMPOUND OR CARBOXYLIC ACID JP 8-5O1299. A 2, 1996 ESTER COMPOUND JP 200O281672 A * 10, 2000 WO WO-94/05639 A1 3, 1994 (75) Inventors: Shigeyoshi Nishino, Ube (JP); Kenji Hirotsu, Ube (JP); Hidetaka Shima, OTHER PUBLICATIONS Ube (JP); Keiji Iwamoto, Ube (JP); Lawerence I. Kruse et al., J. Med. Chem. 1990, vol. 33, No. 2, pp. Takashi Harada, Ube (JP) T81 to 789. Christoph Strassier et al., Helvetica Chimica Acta, vol. 80, pp. 1528 (73) Assignee: Ube Industries, Ltd, Ube-shi (JP) to 1554, 1997. (*) Notice: Subject to any disclaimer, the term of this * cited by examiner patent is extended or adjusted under 35 Primary Examiner Kamal A. Saeed U.S.C. 154(b) by 0 days. Assistant Examiner Shawquia Young (74) Attorney, Agent, or Firm—Birch, Stewart, Kolasch & (21) Appl. No.: 10/572,373 Birch, LLP (22) PCT Filed: Sep. 17, 2004 (57) ABSTRACT PCT/UP2004/O13626 (86). PCT No.: The present invention discloses a process for preparing a S 371 (c)(1), nitrile compound, a carboxylic acid compound or a carboxy (2), (4) Date: Mar. 16, 2006 lic acid ester compound represented by the formula (2): (87) PCT Pub. No.: WO2005/0284.10 (2) PCT Pub. Date: Mar. 31, 2005 R (65) Prior Publication Data R 1. R2 US 2006/0287541 A1 Dec. -
Recommended Methods for the Identification and Analysis of Fentanyl and Its Analogues in Biological Specimens
Recommended methods for the Identification and Analysis of Fentanyl and its Analogues in Biological Specimens MANUAL FOR USE BY NATIONAL DRUG ANALYSIS LABORATORIES Laboratory and Scientific Section UNITED NATIONS OFFICE ON DRUGS AND CRIME Vienna Recommended Methods for the Identification and Analysis of Fentanyl and its Analogues in Biological Specimens MANUAL FOR USE BY NATIONAL DRUG ANALYSIS LABORATORIES UNITED NATIONS Vienna, 2017 Note Operating and experimental conditions are reproduced from the original reference materials, including unpublished methods, validated and used in selected national laboratories as per the list of references. A number of alternative conditions and substitution of named commercial products may provide comparable results in many cases. However, any modification has to be validated before it is integrated into laboratory routines. ST/NAR/53 Original language: English © United Nations, November 2017. All rights reserved. The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the United Nations concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. Mention of names of firms and commercial products does not imply the endorse- ment of the United Nations. This publication has not been formally edited. Publishing production: English, Publishing and Library Section, United Nations Office at Vienna. Acknowledgements The Laboratory and Scientific Section of the UNODC (LSS, headed by Dr. Justice Tettey) wishes to express its appreciation and thanks to Dr. Barry Logan, Center for Forensic Science Research and Education, at the Fredric Rieders Family Founda- tion and NMS Labs, United States; Amanda L.A. -
Cationic Oligomerization of Ethylene Oxide
Polymer Journal, Vol. 15, No. 12, pp 883-889 (1983) Cationic Oligomerization of Ethylene Oxide Shiro KOBAYASHI, Takatoshi KOBAYASHI, and Takeo SAEGUSA Department of Synthetic Chemistry, Faculty of Engineering, Kyoto University, Kyoto 606, Japan (Received July 29, 1983) ABSTRACT: The oligomerization of ethylene oxide (EO) was investigated with several cationic catalysts to find a method for producing cyclic oligomers (crown ethers). The reactions were monitored by NMR spectroscopy (1 H and 19F) and gas chromatography. The composition of oligomers was found to change during the reactions, and the production of 1,4-dioxane increased at the later stage of the reactions. This indicates that the composition of oligomers is kinetically controlled. The formation of higher cyclic oligomers was favored by the addition of tetrahydro pyran or 1,4-dioxane to the system catalyzed by an oxonium salt; the maximum yield of cyclic tetramer was 16.8%. The effect of alkali metal salts was also examined. A template effect was observed to increase the amount of cyclic oligomer production. KEY WORDS Cationic Oligomerization I Ethylene Oxide I Cyclic Oligomers I Crown Ether I Kinetically Controlled Reaction I Additive Effects of Metal Salts I Template Effect I An extensive study was recently carried out on EXPERIMENTAL the cationic. polymerization of heterocyclic mono mers which, it was found, may lead to polymers Materials containing significant amounts of linear and cyclic All reagents were distilled under nitrogen. A oligomers.1 The most thoroughly studied monomer commercial sample of EO was distilled twice. was ethylene oxide (EO). Eastham et a!. observed Tetrahydropyran (THP) and DON were dried with that the cationic polymerization of EO resulted in sodium metal and distilled. -
United States Patent (19) 11) 4,448,977 Warner Et Al
United States Patent (19) 11) 4,448,977 Warner et al. 45 May 15, 1984 54 STABLIZED ACETALACD (56) References Cited COMPOSITIONS U.S. PATENT DOCUMENTS 75 Inventors: Glenn H. Warner, St. Albans; Louis 2,546,018 3/1951 Smith et al. ......................... 549/417 F. Theiling, Jr., Charleston, both of 2,801,216 7/1957 Yoder et al. ........................ 549/47 W. Va.; Marvin G. Freid, Putnam 3,023,243 2/1962 Stansbury et al. .................. 549/416 Valley, N.Y. OTHER PUBLICATIONS Assignee: (73) Union Carbide Corporation, Harries, C. and Tank, L., Chem. Ber. 41, 1701 (1908). Danbury, Conn. Mutterer, F., Morgen, J., Biedermann, J., Fleury, J. and 21) Appl. No.: 411,620 Weiss, R., Bull. Soc. Chim. France, No. 12, 4478-4486 (1969). 22 Filed: Aug. 26, 1982 Kankaanpera, K., Acta. Chem. Scan. 23, 1465-1470 (1969). Related U.S. Application Data Primary Examiner-Nicky Chan 63 Continuation-in-part of Ser. No. 178,133, Aug. 14, 1980, abandoned, which is a continuation of Ser. No. Attorney, Agent, or Firm-Gerald L. Coon; Henry H. 961,714, Nov. 17, 1978, Pat. No. 4,244,876. Gibson 51 Int. Cl. .................... CO7D 309/06; CO7C 41/46; 57 ABSTRACT CO7C47/198 A storage stable composition of glutaraldehyde acetals (52) U.S. C. .................................... 549/201; 568/421; and an organic acidic catalyst, which can be converted 568/581; 568/465; 568/483; 568/486; 252/855 to glutaraldehyde at the site and upon demand, by the addition of water. (58 Field of Search ................ 549/201, 417; 568/421, 568/581, 582, 496, 497,600, 603 9 Claims, No Drawings 4,448,977 2 wherein R has a value of from 1 to 6, preferably from 1 STABLIZED ACETALACID COMPOSITIONS to 3, will produce a mixture of the corresponding 2,6- dialkoxy-tetrahydropyran, dialkoxypentanal and This application is a continuation-in-part of applica 1,1,5,5-tetraalkoxy-pentane; which mixture can be sub tion Ser. -
UNIVERSITY of CALIFORNIA Los Angeles Biodegradation of 1,4
UNIVERSITY OF CALIFORNIA Los Angeles Biodegradation of 1,4-Dioxane in Co-Contaminant Mixtures A dissertation submitted in partial satisfaction of the requirements for the degree Doctor of Philosophy in Civil Engineering by Shu Zhang 2017 © Copyright by Shu Zhang 2017 ABSTRACT OF THE DISSERTATION Biodegradation of 1,4-Dioxane in Co-Contaminant Mixtures by Shu Zhang Doctor of Philosophy in Civil Engineering University of California, Los Angeles, 2017 Professor Shaily Mahendra, Chair Bioremediation is a promising technology to degrade or detoxify various organic and inorganic compounds in polluted environments by using microbiological activity, but it is sensitive to biogeochemical conditions as well as co-occuring compounds at impacted sites. This study focused on biodegradation of 1,4-dioxane, which is a carcinogen and an emerging water contaminant. 1,4-Dioxane was utilized as a stabilizer of chlorinated solvents, such as 1,1,1- trichloroethane (TCA); and it has been found widespread in groundwater. Many US states are implementing lower regulatory advisory levels based on the toxicity profile of 1,4-dioxane and the potential public health risks. However, the unique chemical properties of 1,4-dioxane, such as high water solubility, low Henry’s law constant, and importantly, the co-occurrence with chlorinated solvents and other contaminants, increase the challenges to efficiently cleanup 1,4- ii dioxane contaminations. The objectives of this research were to measure and model the effects of chlorinated solvents on 1,4-dioxane metabolic biodegradation by laboratory pure cultures, elucidate the mechanisms of the inhibition, and test the effects of mixtures of co-contaminants in samples collected from actual 1,4-dioxane contaminated sites. -
Complexes Ivan Habuš, Zlata Raza, and Vitomir Šunjić*
CROATICA CHEMICA ACTA CCACAA 61 (4) 857-866 (1988) OriginaL ScientiJic Paper CCA-1833 UDC 54.05 YU ISSN 0011-1643 Preparation of Chiral Diphenylphosphines from D-Glucose and Enantioselective Hydrogenation with Their Rh(l) Complexes Ivan Habuš, ZLata Raza, and Vitomir Šunjić* Rudjer Bošković Institute, Department of Organic Chemistry and Biochemistry, P.O.B. 1016, 41001 Zagreb, YugosLavia Received DecembeR 7, 1987 (2R,3S)-2-MethYlsulfonyloXYmeihyl-3-meThYlSulfonYloXY-teTRa- hydropyran (4), derived from n-glucose, is diphenYlphoSphinated to (2R,3R)-2-diphenYlphosphinomethyl-3-diphenYlphosphino-tetrahy- dropyran (7), which is formed as aminor prodUcT. Compound 8 iS the predominant prodUct, formed on 3,4-elimination. PrepaRation and characteRization of The rhodium(I) complexes 10-12 iS deS- cribed. Complex 10 of bidentate Iigand 7 exhibits in hYdrogenation of Z-a-N-acetylaminocinnamic acid enanTioselecTiviTY comparable To That obtained with Rhodium(I) complex of (-)-DIOP (-70010e. e.). SaTUrated monophosphine, (2S)-2-diphenYlphoSphinomethYl-tetra- hYdropYran (9) affords mixed Rhodium(I) compleX (11, 12), Which exhibits low enantioselectiViTY. INTRODUCTION The aSYmmetric catalYTic hYdRogenation of prochiRal alefinS conSTituteS one of The most impressive achieVements to date in catalYtic SelectiviTY. Many RevieWS on thiS topic are available.v? PreviouSlY, we investigated The homo- geneaUS catalytic hYdrogenation of VariouS pRochiral SUbStrates, caTalyzed bY Same known ar neWlY developed Rhodium(I) complexeS of chiral diphe- nylphosphines ar diphenylphoSphinites.š -! We wiSh to describe here The investigation of preparation and enantioselective hydrogenation with chiral diphenYlphoSphines derived from D-glucose, the most widespread monosaccha- ride in nature. These resUlts are of interest in view of The knoWn difficulTieS encountered by others in preparatian of bis-diphenYlphosphineS derived from cyclic diols bY nucleophilic SUbstitution of TheiR activated esteRS, usuaUY TosylaTes ar mesylaTes. -
A Study of the Solvolysis Reactions of Tetrahydrofurfuryl Tosylate
Illinois Wesleyan University Digital Commons @ IWU Honors Projects Chemistry 4-25-2000 A Study of the Solvolysis Reactions of Tetrahydrofurfuryl Tosylate Rebecca Centko '00 Illinois Wesleyan University Follow this and additional works at: https://digitalcommons.iwu.edu/chem_honproj Part of the Chemistry Commons Recommended Citation Centko '00, Rebecca, "A Study of the Solvolysis Reactions of Tetrahydrofurfuryl Tosylate" (2000). Honors Projects. 32. https://digitalcommons.iwu.edu/chem_honproj/32 This Article is protected by copyright and/or related rights. It has been brought to you by Digital Commons @ IWU with permission from the rights-holder(s). You are free to use this material in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/ or on the work itself. This material has been accepted for inclusion by faculty at Illinois Wesleyan University. For more information, please contact [email protected]. ©Copyright is owned by the author of this document. A Study of The Solvolysis Reactions of Tetrahydrofurfuryl Tosylate Rebecca Centko Advisor: Dr. Ram S. Mohan Chemistry Research Honors Thesis Illinois Wesleyan University April 25,2000 Approval Page A Study of The Solvolysis Reactions of Tetrahydrofurfurfyl Tosylate BY Rebecca Centko A PAPER SUBMITTED AS PART OF THE REQUIREMENT FOR RESEARCH HONORS IN CHEMISTRY Approved: Ram S. Mohan, Ph. D., Research Advisor Illinois Wesleyan University, 1999-2000 Acknowledgements I would like to thank Dr. Ram S. Mohan for the opportunity to work with him and for the countless hours that he has spent with me working on this project. -
Patterns of Nonelectrolyte Permeability in Human Red Blood Cell Membrane
Patterns of Nonelectrolyte Permeability in Human Red Blood Cell Membrane P. NACCACHE and R. I. SHA'AFI From the Department of Physiology, The University of Connecticut School of Medicine, Farmington, Connecticut 06032 ABSTRACT The permeability of human red cell membrane to 90 different molecules has been measured. These solutes cover a wide spectrum of non- electrolytes with varying chemical structure, chain length, lipid solubility, chemical reactive group, ability to form hydrogen bonds, and other properties. In general, the present study suggests that the permeability of red cell membrane to a large solute is determined by lipid solubility, its molecular size, and its hydrogen-bonding ability. The permeability coefficient increases with increas- ing lipid solubility and decreasing ability to form hydrogen bonds, whereas it decreases with increasing molecular size. In the case of small solutes, the pre- dominant diffusion factor is steric hindrance augmented by lipid solubility. It is also found that replacement of a hydroxyl group by a carbonyl group or an ether linkage tends to increase permeability. On the other hand, replacement of a hydroxyl group by an amide group tends to decrease the permeability coeffi- cient. INTRODUCTION Recently, the permeability coefficients of a series of amide, ureas, and diols have been measured on human red cells (1). Based on these studies, it was postulated that there are three important variables which need to be consid- ered separately in understanding the permeation process across human red cell membranes. The first is a parameter describing lipid solubility, the second a parameter depending on molecular size, and the third a parameter which is concerned with the chemical nature of the solute. -
Dinitrogen Tetroxide Complex
A STUDY OF THE TERNARY SYSTEM DIOXANE- TETRAHYDROPYRAN-DINITROGEEN TETR OXIDE DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By BETTY JANE GIBBINS,\t 9 B.S. 9, M.S. The Ohio State University 1953 Approved by: 1 ACKNOWLEDGMENTS The author expresses her appreciation to Dr, Harry H. Sisler for suggesting this research and for his constant interest and guidance throughout the course of the investigation. Appreciation is also extended to Dr. Gunther L. Eichhorn and Dr. Bernard Rubin for data for the binary systems. The author also expresses her appreciation to Dr. Fairfax E. Watkins for constructing Figure 28 and to Dr. William J. Taylor for contributing to the discussion of the structure of the dioxane— dinitrogen tetroxide complex. That part of this research was conducted with the assistance of the Ordnance Corps, U.S. Army, through a contract with The Ohio State University Research Foundation, is also gratefully acknowledged. \ 12:\'7'7fy ii TABLE OF CONTENTS Page ACKNOWLEDGMENTS ............................. i LIST OF FIGURES ........................... iv LIST OF TABLES ............................ vl I. INTRODUCTION ................................. 1 II. STRUCTURE OF DINITROGEN TETROXIDE .......... 2 III. MOLECULAR ADDITION COMPOUNDS OF DINITROGEN TETROXIDE .................. 5 IV. TERNARY PHASE DIAGRAMS ................... 11 a. The Phase Rule ........................ 11 b. The Right Triangular Prism ........... 12 c. Plotting Concentrations ............. 13 d. System with no Compounds or Solid Solutions ................... lb 1. Experimental Behavior ........... 15 2. Space Diagram .................... 17 3. Projection of the Space Diagram on the Base ......... 20 e. Systems with Compounds .............. 22 V. CRYOSCOPIC STUDY OF THE SYSTEM, DIOXANE— TETRAHYDROPYRAN-DINITROGEN TETROXIDE . -
(2S, 3R, 6R)-2-[(R)-1-Hydroxyallyl]-4, 4-Dimethoxy-6-Methyltetrahydro-2H
molbank Short Note (2S,3R,6R)-2-[(R)-1-Hydroxyallyl]-4, 4-dimethoxy-6-methyltetrahydro-2H-pyran-3-ol Jack Bennett and Paul V. Murphy * School of Chemistry, National University of Ireland, H91 TK33 Galway, Ireland; [email protected] * Correspondence: [email protected]; Tel.: +353-91-492465 Received: 8 April 2020; Accepted: 25 May 2020; Published: 3 June 2020 Abstract: (2S,3R,6R)-2-[(R)-1-Hydroxyallyl]-4,4-dimethoxy-6-methyltetrahydro-2H-pyran-3-ol was isolated in 18% after treating the glucose derived (5R,6S,7R)-5,6,7-tris[(triethylsilyl)oxy]nona-1, 8-dien-4-one with (1S)-(+)-10-camphorsulfonic acid (CSA). The one-pot formation of the title compound involved triethylsilyl (TES) removal, alkene isomerization, intramolecular conjugate addition and ketal formation. The compound was characterized by 1H and 13C NMR spectroscopy, ESI mass spectrometry and IR spectroscopy. NMR spectroscopy was used to establish the product structure, including the conformation of its tetrahydropyran ring. Keywords: glucose; tetrahydropyran; deprotection; cyclisation; functionalized scaffold 1. Introduction Tetrahydropyran rings are found commonly in nature. Pyranoses, for example, are saccharides found in the ‘glycocalyx’, a carbohydrate-rich coating around cells, which is essential for interactions with biomolecules and important in numerous biological processes [1,2], including immunity, inflammation and infection [3,4]. The synthesis of mimetics of pyranoses (glycomimetics) is one strategy being investigated to give new therapies of various diseases, and this approach has received significant attention in recent years [5,6] with many structures investigated being tetrahydropyrans. The scaffolding role of pyranoses has also led to a body of work in the area of new scaffold development for medicinal chemistry [7]. -
Introduction (Pdf)
Dictionary of Natural Products on CD-ROM This introduction screen gives access to (a) a general introduction to the scope and content of DNP on CD-ROM, followed by (b) an extensive review of the different types of natural product and the way in which they are organised and categorised in DNP. You may access the section of your choice by clicking on the appropriate line below, or you may scroll through the text forwards or backwards from any point. Introduction to the DNP database page 3 Data presentation and organisation 3 Derivatives and variants 3 Chemical names and synonyms 4 CAS Registry Numbers 6 Diagrams 7 Stereochemical conventions 7 Molecular formula and molecular weight 8 Source 9 Importance/use 9 Type of Compound 9 Physical Data 9 Hazard and toxicity information 10 Bibliographic References 11 Journal abbreviations 12 Entry under review 12 Description of Natural Product Structures 13 Aliphatic natural products 15 Semiochemicals 15 Lipids 22 Polyketides 29 Carbohydrates 35 Oxygen heterocycles 44 Simple aromatic natural products 45 Benzofuranoids 48 Benzopyranoids 49 1 Flavonoids page 51 Tannins 60 Lignans 64 Polycyclic aromatic natural products 68 Terpenoids 72 Monoterpenoids 73 Sesquiterpenoids 77 Diterpenoids 101 Sesterterpenoids 118 Triterpenoids 121 Tetraterpenoids 131 Miscellaneous terpenoids 133 Meroterpenoids 133 Steroids 135 The sterols 140 Aminoacids and peptides 148 Aminoacids 148 Peptides 150 β-Lactams 151 Glycopeptides 153 Alkaloids 154 Alkaloids derived from ornithine 154 Alkaloids derived from lysine 156 Alkaloids -
Version of 14 to Its Methyl Ether 15, the Terminal 11, R = I O Double Bond Was Cleaved by Ozonolysis to Provide Aldehyde 16
Organic & Biomolecular Dynamic Article Links ► Chemistry Cite this: DOI: 10.1039/c0xx00000x PAPER www.rsc.org/obc Total synthesis of the marine toxin phorboxazole A using palladium(II)- mediated intramolecular alkoxycarbonylation for tetrahydropyran synthesis Punlop Kuntiyong, Tae Hee Lee, Christian L. Kranemann and James D. White* Received (in XXX, XXX) Xth XXXXXXXXX 20XX, Accepted Xth XXXXXXXXX 20XX 5 DOI: 10.1039/b000000x The potent antitumor agent phorboxazole A was synthesized from six subunits comprising C1-C2 (115), C3-C8 (98), C9-C19 (74), C20-C32 (52), C33-C41 (84) and C42-C46 (85). Tetrahydropyrans B and C containing cis-2,6-disubstitution were fabricated via palladium(II)-mediated intramolecular alkoxycarbonylation which, in the case of tetrahydropyran C, was carried out with catalytic palladium(II) 10 and p-benzoquinone as the stoichiometric re-oxidant. Tetrahydropyran D was obtained by a stereoselective tin(IV)-catalyzed coupling of a C9 aldehyde with an allylsilane, and the C19-C20 connection was made using a completely stereoselective Wittig-Schlosser (E) olefination. Coupling of the oxazole C32 methyl substituent with the intact C33-C46 -lactone 3 was accompanied by elimination of the vinyl bromide to a terminal alkyne, but the C32-C33 linkage was implemented successfully with 83 15 and C33-C41 lactone 84. The C42-C46 segment of the side chain was then appended via Julia-Kocienski olefination. The macrolide portion of phorboxazole A was completed by means of an Ando-Still- Gennari intramolecular (Z)-selective olefination at C2-C3 which required placement of a (dimethoxyphosphinyl)acetate moiety at C24. Final deprotection led to phorboxazole A via a route in which the longest linear sequence is 37 steps and the overall yield is 0.36%.