Výsledky vyhledávání - "Vladimir Diakiw"

Skeletal rearrangements on chemical ionization of dibenzyl ether and derivatives

Autor: Eric E. Kingston, James S. Shannon, Vladimir Diakiw, Michael J. Lacey

Publikováno v: Organic Mass Spectrometry. 16:428-440

Protonated molecular ions of dibenzyl ether, formed by chemical ionization using hydrogen and isobutane as reagent gases, undergo skeletal rearrangements to lose water and formaldehyde, both in the ion source and the flight path. The rearrangements h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::89ea7fb8597a702d6e58d1183bcbb2fc
https://doi.org/10.1002/oms.1210161003

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The preparation and properties of neutral diamide ionophores for group IIa metal cations

Autor: Irving J. Borowitz, Whei-Oh Lin, Tze-Chein Wun, Robert Bittman, Louis Weiss, Vladimir Diakiw, Grace B. Borowitz

Publikováno v: Tetrahedron. 33:1697-1705

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::696487c98954bcaf93c16d5e960f465d
https://doi.org/10.1016/0040-4020(77)84043-x

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Labelling studies of hydrogen rearrangements in the chemical ionization mass spectra of cyclohexanone and its derivatives

Autor: Michael J. Lacey, Robert J. Goldsack, James S. Shannon, Vladimir Diakiw

Publikováno v: Organic Mass Spectrometry. 13:462-469

Deuterium labelling studies indicate that loss of water from the protonated molecular ion of cyclohexanone involves competitive site-specific eliminations. Loss of alcohol from the protonated molecular ions of 4-alkoxycyclohexanones involves competit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::683dad3b8031766596adcbfd65f60644
https://doi.org/10.1002/oms.1210130807

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Skeletal rearrangement for water loss from molecular protonated ions oft-butoxycyclohexane

Autor: Eric E. Kingston, Patrick M. Gordon, James S. Shannon, Vladimir Diakiw, Michael J. Lacey

Publikováno v: Organic Mass Spectrometry. 24:615-619

Isotopic labelling and chemical substitution support the proposition that the skeletal rearrangement for water loss from molecular protonated ions of t-butoxycyclohexane involves competition between three reaction pathways. The principal reaction pat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21c8021a8a24e6548a0d7d239617af63
https://doi.org/10.1002/oms.1210240817

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The preparation and synthetic utility ofO-substituted normethylmorphines

Autor: Vladimir Diakiw, Irving J. Borowitz

Publikováno v: Journal of Heterocyclic Chemistry. 12:1123-1126

Previously described alkylation procedures on normethylmorphine in ethanol usually give low yields of N- and (phenolic) O,N-alkylated products. While the O-aikylation problem has been overcome for alkyl halides by doing the alkylations in dimethylfor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8f5cfb6c15649f1c8768bd8fc2ac80d
https://doi.org/10.1002/jhet.5570120607

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Anomalous ions in the chemical ionization mass spectra of aromatic nitro and nitroso compounds

Autor: Derek Nelson, Joseph J. Brophy, Vladimir Diakiw, James S. Shannon, Robert J. Goldsack

Publikováno v: Organic Mass Spectrometry. 14:201-203

The appearance of [MH-30]+ ions in the chemical ionization mass spectra of aromatic nitro compounds may be due to their initial reduction to the corresponding amines within the ion source. Aromatic nitroso compounds may be similarly reduced to yield

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b5ceed57d9afddbc00943e26dd933d6
https://doi.org/10.1002/oms.1210140408

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Electron microscopic location of protein thiol residues

Autor: Murray Stewart, Vladimir Diakiw

Publikováno v: Nature. 274:184-186

ATTEMPTS to use conventional transmission electron microscopy to visualise single heavy atoms attached to protein thiol residues are usually unsuccessful, because the signal due to the heavy atom is generally too weak to be detected against backgroun

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a6d3120f5897cac1b8ac1388031724e
https://doi.org/10.1038/274184a0

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ChemInform Abstract: THE CHEMISTRY OF PYRROLIC COMPOUNDS PART 29, SYNTHESIS OF SOME DERIVATIVES OF DEUTEROPORPHYRIN IX

Autor: Peter S. Clezy, Vladimir Diakiw

Publikováno v: Chemischer Informationsdienst. 6

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::94ebcac7acc06e449b54a285bd8d0925
https://doi.org/10.1002/chin.197541375

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ChemInform Abstract: CHEMISTRY OF PYRROLIC COMPOUNDS. XXX. APPROACH TO THE SYNTHESIS OF PORPHYRIN A

Autor: Vladimir Diakiw, Peter S. Clezy

Publikováno v: Chemischer Informationsdienst. 7

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8a39732b8a4d000b06259ef086078798
https://doi.org/10.1002/chin.197611370

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Skeletal rearrangements of protonated molecular ions of some ethers

Autor: Vladimir Diakiw, James S. Shannon, Michael J. Lacey, Colin G. Macdonald

Publikováno v: Organic Mass Spectrometry. 14:58-58

Skeletal rearrangements are reported of protonated molecular ions in the chemical ionization mass spectra of allyl cyclohexyl ether, benzyl cyclohexyl ether, t-butyl cyclohexyl ether and dibenzyl ether.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::36204c7cbd51142f76f150a3091ec530
https://doi.org/10.1002/oms.1210140115

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