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Michalak O, Cmoch P, Leś A, Cybulski M, Krzeczyński P, Trzcińska K, Miszta P, Mehta P, Filipek S. Unexpected Reaction Products of Uracil and Its Methyl Derivatives with Acetic Anhydride and Methylene Chloride. J Org Chem 2021; 86:14321-14332. [PMID: 34591486 DOI: 10.1021/acs.joc.1c00748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New acetyl derivatives of uracil, 6-methyluracil, and thymine were obtained in the course of an unconventional synthesis in methylene chloride. It was shown that products with the acetyloxymethyl fragment are formed according to a mechanism different from that for products with the acetyloxyethyl group. In particular, for uracil it was proven that the reaction with Ac2O, TEA, and CH2Cl2 leads to 1-acetyloxymethyluracil, where the N1 substituent is composed of the -CH2- fragment that originated from CH2Cl2 and the 1-acetyloxy moiety from Ac2O. The reaction of uracil with Ac2O, TEA, CH2Cl2, and DMAP leads to an acetyloxyethyl derivative in which the -CH2-CH2- fragment originates from TEA and the 1-acetyloxy moiety from Ac2O. A possible mechanism for the formation of new compounds was suggested and supported by the density functional theory/B3LYP quantum mechanical calculations. New compounds (39 in total, including seven deuterated) were fully characterized by nuclear magnetic resonance and high-resolution mass spectrometry techniques.
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Affiliation(s)
- Olga Michalak
- Department of Pharmacy, Cosmetic Chemistry and Biotechnology, Team of Chemistry, Łukasiewicz Research Network─Industrial Chemistry Institute, 8 Rydygiera Street, 01-793 Warsaw, Poland
| | - Piotr Cmoch
- Institute of Organic Chemistry Polish Academy of Sciences, 44/52 Kasprzaka Street, 01-224 Warsaw, Poland
| | - Andrzej Leś
- Faculty of Chemistry, University of Warsaw, 02-093 Warsaw, Poland
| | - Marcin Cybulski
- Department of Pharmacy, Cosmetic Chemistry and Biotechnology, Team of Chemistry, Łukasiewicz Research Network─Industrial Chemistry Institute, 8 Rydygiera Street, 01-793 Warsaw, Poland
| | - Piotr Krzeczyński
- Department of Pharmacy, Cosmetic Chemistry and Biotechnology, Team of Chemistry, Łukasiewicz Research Network─Industrial Chemistry Institute, 8 Rydygiera Street, 01-793 Warsaw, Poland
| | - Kinga Trzcińska
- Analytical Department, Łukasiewicz Research Network─Industrial Chemistry Institute, 8 Rydygiera Street, 01-793 Warsaw, Poland
| | - Przemysław Miszta
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 02-093 Warsaw, Poland
| | - Pakhuri Mehta
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 02-093 Warsaw, Poland
| | - Sławomir Filipek
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 02-093 Warsaw, Poland
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2
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Enthalpies of Adduct Formation between Boron Trifluoride and Selected Organic Bases in Solution: Toward an Accurate Theoretical Entry to Lewis Basicity. Molecules 2021; 26:molecules26216659. [PMID: 34771078 PMCID: PMC8587173 DOI: 10.3390/molecules26216659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/30/2021] [Accepted: 11/01/2021] [Indexed: 11/26/2022] Open
Abstract
The Lewis basicity of selected organic bases, modeled by the enthalpies of adduct formation between gaseous BF3 and bases in dichloromethane (DCM) solution, is critically examined. Although experimental enthalpies for a large number of molecules have been reported in the literature, it may be desirable to estimate missing or uncertain data for important Lewis bases. We decided to use high-level ab initio procedures, combined with a polarized continuum solvation model, in which the solvated species were the clusters formed by specific hydrogen bonding of DCM with the Lewis base and the Lewis base/BF3 adduct. This mode of interaction with DCM corresponds to a specific solvation model (SSM). The results essentially showed that the enthalpy of BF3 adduct formation in DCM solution was clearly influenced by specific interactions, with DCM acting as hydrogen-bonding donor (HBD) molecule in two ways: base/DCM and adduct/DCM, confirming that specific solvation is an important contribution to experimentally determined Lewis basicity scales. This analysis allowed us to conclude that there are reasons to suspect some gas-phase values to be in error by more than the stated experimental uncertainty. Some experimental values in DCM solution that were uncertain for identified reasons could be complemented by the computed values.
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3
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Elagawany M, Maram L, Elgendy B. Novel synthesis of benzotriazolyl alkyl esters: an unprecedented CH 2 insertion. RSC Adv 2021; 11:7564-7569. [PMID: 35423285 PMCID: PMC8694985 DOI: 10.1039/d0ra10413b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/08/2021] [Indexed: 01/10/2023] Open
Abstract
We have developed a novel method for the synthesis of benzotriazolyl alkyl esters (BAEs) from N-acylbenzotriazoles and dichloromethane (DCM) under mild conditions. This reaction is one of few examples to show the use of DCM as a C-1 surrogate in carbon-heteroatom bond formation and to highlight the versatility of using DCM as a methylene building block.
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Affiliation(s)
- Mohamed Elagawany
- Department of Pharmaceutical and Administrative Sciences, University of Health Sciences and Pharmacy St. Louis MO 63110 USA
- Center for Clinical Pharmacology, Washington University School of Medicine, St. Louis College of Pharmacy St. Louis MO 63110 USA
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Damanhour University Damanhour Egypt
| | - Lingaiah Maram
- Department of Pharmaceutical and Administrative Sciences, University of Health Sciences and Pharmacy St. Louis MO 63110 USA
- Center for Clinical Pharmacology, Washington University School of Medicine, St. Louis College of Pharmacy St. Louis MO 63110 USA
| | - Bahaa Elgendy
- Department of Pharmaceutical and Administrative Sciences, University of Health Sciences and Pharmacy St. Louis MO 63110 USA
- Center for Clinical Pharmacology, Washington University School of Medicine, St. Louis College of Pharmacy St. Louis MO 63110 USA
- Chemistry Department, Faculty of Science, Benha University Benha 13518 Egypt
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4
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Beutner GL, Ayers S, Brueggemeier S, Cho P, Carrasquillo-Flores R, Kelly K, Gonzalez FL, Marshall J, Mukherjee S, Qiu J, Smith MJ. Crystallizing Fats? Development of a Scalable, Chromatography-Free Synthesis of Cationic Lipids. Org Process Res Dev 2020. [DOI: 10.1021/acs.oprd.0c00374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gregory L. Beutner
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Sloan Ayers
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Shawn Brueggemeier
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Patricia Cho
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Ronald Carrasquillo-Flores
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Kathleen Kelly
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Federico Lora Gonzalez
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Jonathan Marshall
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Subha Mukherjee
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Jun Qiu
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Michael J. Smith
- Chemical Process Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
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5
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Ostacolo C, Di Sarno V, Musella S, Ciaglia T, Vestuto V, Pepe G, Merciai F, Campiglia P, Gomez Monterrey IM, Bertamino A. An Efficient Approach to Aromatic Aminomethylation Using Dichloromethane as Methylene Source. Front Chem 2019; 7:568. [PMID: 31457005 PMCID: PMC6700257 DOI: 10.3389/fchem.2019.00568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 07/26/2019] [Indexed: 01/30/2023] Open
Abstract
Ultrasound-promoted N-aminomethylation of indoles can be achieved in basic medium using sodium hydride and dichloromethane (DCM) as C1 donor source. This innovative amino methylation protocol results in good to excellent yields of multifunctional indole derivatives. The procedure is also applicable to other aza-heterocyclic compounds and, interestingly, affords direct access to aminomethyl-substituted aryl alcohols.
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Affiliation(s)
- Carmine Ostacolo
- Department of Pharmacy, University of Naples "Federico II", Naples, Italy
| | | | | | - Tania Ciaglia
- Department of Pharmacy, University of Salerno, Fisciano, Italy
| | | | - Giacomo Pepe
- Department of Pharmacy, University of Salerno, Fisciano, Italy
| | | | - Pietro Campiglia
- Department of Pharmacy, University of Salerno, Fisciano, Italy.,Fondazione EBRIS, Salerno, Italy
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Khumalo MF, Akpan ED, Chinthakindi PK, Brasil EM, Rajbongshi KK, Makatini MM, Govender T, Kruger HG, Naicker T, Arvidsson PI. Synthesis of novel 1,2,4-thiadiazinane 1,1-dioxides via three component SuFEx type reaction. RSC Adv 2018; 8:37503-37507. [PMID: 35557800 PMCID: PMC9089429 DOI: 10.1039/c8ra07627h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 10/31/2018] [Indexed: 11/21/2022] Open
Abstract
Herein, we report the preparation of 1,2,4-thiadiazinane 1,1-dioxides from reaction of β-aminoethane sulfonamides with dichloromethane, dibromomethane and formaldehyde as methylene donors. The β-aminoethane sulfonamides were obtained through sequential Michael addition of amines to α,β-unsaturated ethenesulfonyl fluorides followed by further DBU mediated sulfur(vi) fluoride exchange (SuFEx) reaction with amines at the S-F bond.
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Affiliation(s)
- Mzilikazi F Khumalo
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Ekemini D Akpan
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Praveen K Chinthakindi
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Edikarlos M Brasil
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Kamal K Rajbongshi
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Maya M Makatini
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand PO Witz 2050 Johannesburg South Africa
| | - Thavendran Govender
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Hendrik G Kruger
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Tricia Naicker
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
| | - Per I Arvidsson
- Catalysis and Peptide Research Unit, University of KwaZulu Natal Durban South Africa 4001
- Science for Life Laboratory, Drug Discovery & Development Platform & Division of Translational Medicine and Chemical Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet Stockholm Sweden
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7
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Grirrane A, Álvarez E, García H, Corma A. Deactivation of Cationic Cu
I
and Au
I
Catalysts for A
3
Coupling by CH
2
Cl
2
: Mechanistic Implications of the Formation of Neutral Cu
I
and Au
I
Chlorides. Angew Chem Int Ed Engl 2014; 53:7253-8. [DOI: 10.1002/anie.201403973] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Abdessamad Grirrane
- Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia (Spain)
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas CSIC‐US, Departamento de Química Inorgánica, Av. Américo Vespucio 49, 41092 Sevilla (Spain)
| | - Hermenegildo García
- Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia (Spain)
| | - Avelino Corma
- Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia (Spain)
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8
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Rawat VS, Bathini T, Govardan S, Sreedhar B. Catalyst-free activation of methylene chloride and alkynes by amines in a three-component coupling reaction to synthesize propargylamines. Org Biomol Chem 2014; 12:6725-9. [DOI: 10.1039/c4ob00986j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Grirrane A, Álvarez E, García H, Corma A. Deactivation of Cationic Cu
I
and Au
I
Catalysts for A
3
Coupling by CH
2
Cl
2
: Mechanistic Implications of the Formation of Neutral Cu
I
and Au
I
Chlorides. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403973] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Abdessamad Grirrane
- Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia (Spain)
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas CSIC‐US, Departamento de Química Inorgánica, Av. Américo Vespucio 49, 41092 Sevilla (Spain)
| | - Hermenegildo García
- Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia (Spain)
| | - Avelino Corma
- Instituto Universitario de Tecnología Química CSIC‐UPV, Universidad Politécnica de Valencia, Av. de los Naranjos s/n, 46022 Valencia (Spain)
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10
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Buckley BR, Khan AN, Heaney H. Mannich reactions of alkynes: mechanistic insights and the role of sub-stoichiometric amounts of alkynylcopper(I) compounds in the catalytic cycle. Chemistry 2012; 18:3855-8. [PMID: 22378587 DOI: 10.1002/chem.201103987] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Benjamin R Buckley
- Department of Chemistry, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK
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11
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Affiliation(s)
- Huiling Cui
- Max-Planck-Institut für Kohlenforschung; D-45466; Mülheim an der Ruhr; Germany
| | - Richard Goddard
- Max-Planck-Institut für Kohlenforschung; D-45466; Mülheim an der Ruhr; Germany
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12
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Dumbris SM, Díaz DJ, McElwee-White L. Preparation of hydantoins by catalytic oxidative carbonylation of alpha-amino amides. J Org Chem 2010; 74:8862-5. [PMID: 19863059 DOI: 10.1021/jo9016138] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Hydantoins can be synthesized from the corresponding amino amides employing oxidative catalytic carbonylation using W(CO)(6) as the catalyst, I(2) as the oxidant, CO as the carbonyl source, and DBU as base. Secondary amides afford the hydantoins in good to excellent yields, which decrease as the steric bulk of the N-alkyl substituent increases.
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Affiliation(s)
- Seth M Dumbris
- Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611-7200, USA
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13
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Souquet F, Martens T, Fleury MB. Use of Methylene Chloride as a C1 Unit in N,N-Dialkylaminomethylation Reaction. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397919308009843] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Florence Souquet
- a Laboratoire de Chimie Analytique et Electrochimie, URA CNRS 1310, Faculté de Pharmacie , 4, Avenue de l'Observatoire, 75270, Paris Cedex , 06
| | - Thierry Martens
- a Laboratoire de Chimie Analytique et Electrochimie, URA CNRS 1310, Faculté de Pharmacie , 4, Avenue de l'Observatoire, 75270, Paris Cedex , 06
| | - Maurice-Bernard Fleury
- a Laboratoire de Chimie Analytique et Electrochimie, URA CNRS 1310, Faculté de Pharmacie , 4, Avenue de l'Observatoire, 75270, Paris Cedex , 06
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14
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Bundy GL, Banitt LS, Dobrowolski PJ, Palmer JR, Schwartz TM, Zimmermann DC, Lipton MF, Mauragis MA, Veley MF, Appell RB, Clouse RC, Daugs ED. Synthesis of 2,4-Di-1-pyrrolidinyl-9H-pyrimido[4,5-b]indoles, Including Antiasthma Clinical Candidate PNU-142731A. Org Process Res Dev 2001. [DOI: 10.1021/op000221p] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gordon L. Bundy
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Lee S. Banitt
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Paul J. Dobrowolski
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - John R. Palmer
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Theresa M. Schwartz
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - David C. Zimmermann
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Michael F. Lipton
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Michael A. Mauragis
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Michael F. Veley
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Robert B. Appell
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Robert C. Clouse
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
| | - Edward D. Daugs
- Combinatorial and Medicinal Chemistry, Chemical Process Research and Preparations, Pharmacia, Kalamazoo, Michigan 49001 and Dow Contract Manufacturing Services, The Dow Chemical Company, Midland, Michigan 48674, U.S.A
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15
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Lounasmaa M, Hanhinen P. Interpretation of the formation of nine "artifact indole alkaloids" in the ajmaline/sarpagine series. JOURNAL OF NATURAL PRODUCTS 2000; 63:1456-1460. [PMID: 11076580 DOI: 10.1021/np000206d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- M Lounasmaa
- Laboratory for Organic and Bioorganic Chemistry, Technical University of Helsinki, P.O. Box 6100, FIN-02015 HUT Espoo, Finland.
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16
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Winter RF, Hornung FM. Trapping of a Ruthenium−Butatrienylidene Intermediate by Tertiary Amines. 2-Ammoniobutenynyl Complexes. Organometallics 1999. [DOI: 10.1021/om9903240] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rainer F. Winter
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - F. M. Hornung
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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17
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Winter RF, Wolmershäuser G. The dichloromethane induced fragmentation of ferrocenylmethyldimethylamine. Mechanistic aspects and crystallographic and electrochemical investigation of the (FcCH2)2NMe2+ and FcCH2NMe2H+ ions. J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(98)00866-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Hon YS, Chang FJ, Lu L. Preparation of α-substituted acroleins via the reaction of aldehyde with dihalomethane and diethylamine. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/c39940002041] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Grant AD, Zacharias DE, Mascavage LM, Kemmerer GE, Dalton DR. The chloromethylation of codeine. Isolation of a quaternary iodide. J Heterocycl Chem 1993. [DOI: 10.1002/jhet.5570300250] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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?kari? V, ?aplar V, ?kari? ?, ?ini? M. Regioselective Transformations of 2?,3?-Seconucleosides into Anhydro Structures and Chiral Crown Ethers. Helv Chim Acta 1992. [DOI: 10.1002/hlca.19920750209] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Kaupp G, Sailer K. Imidazo[1,2-e][1,3,5]triazepin-Derivate: erste Verbindungen mit einem neuen Heterocyclensystem. Angew Chem Int Ed Engl 1990. [DOI: 10.1002/ange.19901020813] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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23
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Maryanoff CA, Stanzione RC, Plampin JN. REACTIONS OF OXIDIZED THIOUREAS WITH AMINE NUCLEOPHILES1. ACTA ACUST UNITED AC 1986. [DOI: 10.1080/03086648608072773] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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The Condylocarpine Group of Indole Alkaloids. ACTA ACUST UNITED AC 1986. [DOI: 10.1007/978-3-7091-8888-0_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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