1
|
Koch HF, Koch JG, Mishima M, Iacono P, Wedgwood NM. The Competition of the Loss of a Beta Fluoride and Hydron Transfer Between Carbon and Oxygen During Exchange and Elimination Reactions. Z PHYS CHEM 2009. [DOI: 10.1524/zpch.2008.5381] [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
Reactions of methanolic sodium methoxide with the series p-CF3C6H4C
i
HClRX [RX is -CH2Cl, -CH2F, -CHClF, -CHF2, -CF2Cl or -CF3] are reported to probe reaction mechanisms for dehydrohalogenation reactions compared to hydron exchange. All of the dehydrochlorinations and dehydrofluorinations from CH2F occur by a two step mechanism via a hydrogen-bonded carbanion intermediate. Dehydrofluorinations from CHF2 occurs via a carbanion no longer stabilized by a hydrogen bond and the fluoride ion is eliminated faster than proton transfer from methanol. Reactions from the CF3 occur from a similar intermediate but exchange of the benzylic proton is faster than the dehydrofluorination. Reactions of ethanolic sodium ethoxide are also reported with the series p-CF3C6H4C
i
HFRX [RX is -CH2F, -CHF2, -CF2Cl or -CF3]. Density functional calculations using B3LYP/6-31+G(d,p) were used to probe the compounds and intermediates.
Collapse
|
2
|
Peles DN, Thoburn JD. Multidimensional Tunneling in the [1,5] Shift in (Z)-1,3-Pentadiene: How Useful Are Swain−Schaad Exponents at Detecting Tunneling? J Org Chem 2008; 73:3135-44. [PMID: 18363407 DOI: 10.1021/jo702668u] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dana N. Peles
- Department of Chemistry, Randolph-Macon College, Ashland, Virginia 23005
| | - John D. Thoburn
- Department of Chemistry, Randolph-Macon College, Ashland, Virginia 23005
| |
Collapse
|
3
|
Vitanova DV, Hampel F, Hultzsch KC. (+)-Neomenthyl- and (−)-phenylmenthyl-substituted cyclopentadienyl and indenyl yttrocenes as catalysts in asymmetric hydroamination/cyclization of aminoalkenes (AHA). J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2007.05.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
4
|
DeTuri VF, Koch HF, Koch JG, Lodder G, Mishima M, Zuilhof H, Abrams NM, Anders CE, Biffinger JC, Han P, Kurland AR, Nichols JM, Ruminski AM, Smith PR, Vasey KD. Comparison of gas-phase acidities of some carbon acids with their rates of hydron exchange in methanolic methoxide. J PHYS ORG CHEM 2006. [DOI: 10.1002/poc.1057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
5
|
Smedarchina Z, Siebrand W. Generalized Swain–Schaad relations including tunneling and temperature dependence. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.05.102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
6
|
Hata M, Hirano Y, Hoshino T, Tsuda M. Origin of the Primary Kinetic Hydrogen Isotope Effects on N-dealkylation from N-alkylamine by Hemoproteins. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2001. [DOI: 10.1246/bcsj.74.1577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
7
|
Katritzky AR, Nichols DA, Siskin M, Murugan R, Balasubramanian M. Reactions in high-temperature aqueous media. Chem Rev 2001; 101:837-92. [PMID: 11709860 DOI: 10.1021/cr960103t] [Citation(s) in RCA: 193] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA
| | | | | | | | | |
Collapse
|
8
|
Koch HF, Biffinger JC, Mishima M, Mustanir, Lodder G. Comparison of ?G�Acid (gas phase) and kinetic acidities measured in methanolic sodium methoxide. J PHYS ORG CHEM 1998. [DOI: 10.1002/(sici)1099-1395(199808/09)11:8/9<614::aid-poc46>3.0.co;2-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
9
|
Fontana G, Frenna V, Gruttadauria M, Natoli MC, Noto R. Kinetic study of base-promoted elimination reactions of some 1,1,1-trihalo-2,2-bis(dimethoxyphenyl)ethanes in alcoholic solutions. J PHYS ORG CHEM 1998. [DOI: 10.1002/(sici)1099-1395(199801)11:1<54::aid-poc972>3.0.co;2-d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
10
|
Bowden K, Hirani SIJ. The acidity of weak carbon acids. Part 4. The kinetic acidities of 4-nitro-, 4,4′-dinitro and 4,4′,4″-trinitrotriphenylmethanes. ACTA ACUST UNITED AC 1990. [DOI: 10.1039/p29900001885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
11
|
Raoult E, Sarrazin J, Tallec A. Utilisation de membranes echangeuses d'ions en electrosynthese organique. Tetrahedron 1987. [DOI: 10.1016/s0040-4020(01)87706-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
12
|
|
13
|
|
14
|
Eaborn C, Singh B. Base-catalysed hydrogen-exchange between organogermanium hydrides and methanol. J Organomet Chem 1979. [DOI: 10.1016/s0022-328x(00)94078-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
15
|
The Reactivity—Selectivity Principle and its Mechanistic Applications. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 1977. [DOI: 10.1016/s0065-3160(08)60108-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
|
16
|
Chapter 2 Proton Transfer to and from Carbon. ACTA ACUST UNITED AC 1977. [DOI: 10.1016/s0069-8040(08)70090-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
|
17
|
McLennan D, Wong R. Rate-acidity correlation for the base-promoted dehydrochlorination of DDT in methanol. Evidence for E1cB elimination. Tetrahedron Lett 1972. [DOI: 10.1016/s0040-4039(01)84965-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|