Organophosphorus compounds. VIII. Diphenylphosphinothioic acid derivatives as reagents for proteins

1969 ◽  
Vol 22 (11) ◽  
pp. 2359 ◽  
Author(s):  
RA Spence ◽  
JM Swan ◽  
SHB Wright
Keyword(s):  
Mass Spectra ◽  
Organophosphorus Compounds ◽  
Phosphorus Compounds ◽  
Radioactive Labelling ◽  
Condensing Agents ◽  
Derivatives Of ◽  
Model Reactions

Esters and other derivatives of diphenylphosphinothioic acids are examined as potential agents for the radioactive labelling of immunoglobulins and other proteins. Syntheses, model reactions with amines, and mass spectra of the organo-phosphorus compounds are discussed. The labelling of immunoglobulins by reaction with [32P]diphenylphosphinothioic chloride, with [32P]diphenylphosphinothioic isothiocyanate, and with [32P]diphenylphosphinodithioic acid in the presence of condensing agents such as dimethylcyanamide and carbodiimides is reported.

Reaction of Trivalent Organophosphorus Compounds with Selenium

1978 ◽  
Vol 33 (9) ◽  
pp. 1040-1046 ◽  
Author(s):  
Maria Konieczny ◽  
George Sosnovsky
Keyword(s):  
Room Temperature ◽  
Organophosphorus Compounds ◽  
Phosphorus Compounds ◽  
Trivalent Phosphorus ◽  
Derivatives Of

Selenium derivatives of pentavalent organophosphorus compounds 9, 10, 11 (Ṙ = 2,2,6,6- tetramethyl-1-oxyl-4-piperidyl), 12 and 13 were prepared in 79-99%yields via the reaction of the corresponding trivalent phosphorus compounds 14, 15, 16, 17, 18 with blackselenium in benzene at room temperature in 20 hours.

Inductive effect in EI-mass spectra of some 5,6-dihalogenides and 5,6-halohydrins of 5α-cholestan-3β-ol and 3β-acetoxy-5α-cholestane

1982 ◽  
Vol 47 (11) ◽  
pp. 2946-2960 ◽  
Author(s):  
Antonín Trka ◽  
Alexander Kasal
Keyword(s):  
Mass Spectra ◽  
Inductive Effect ◽  
Molecular Ions ◽  
Hydroxyl Group ◽  
Halogen Atoms ◽  
Derivatives Of

Partial EI-mass spectra of 3β-hydroxy- and 3β-acetoxy-5α-cholestanes substituted in positions 5α-, 6β- or 5α,6β- with a hydroxyl group or halogen atoms (fluorine, chlorine, bromine) are presented. The molecular ions of 5α,6β-disubstituted derivatives of 3β-hydroxy-5α-cholestane (or of its 3-acetate) are considerably more stable than the corresponding monosubstituted derivatives if at least one of the pair of the vicinal substituents is chlorine or fluorine. This increase in stability, most striking in 5α- and 6β-fluoro compounds, is explained by the inductive effect.

Mass spectra of dicyanomethylene derivatives of benzophenone analogs

1983 ◽  
Vol 18 (11) ◽  
pp. 457-461 ◽  
Author(s):  
Ching-Bore Wang ◽  
Guor-Rong Her ◽  
J. Throck Watson
Keyword(s):  
Mass Spectra ◽  
Derivatives Of

ω-Aldehydo Sugars Prepared by Ninhydrin Oxidation

1974 ◽  
Vol 52 (23) ◽  
pp. 3905-3912 ◽  
Author(s):  
Alan R. Gibson ◽  
Laurence D. Melton ◽  
Keith N. Slessor
Keyword(s):  
Mass Spectra ◽  
Oxidative Deamination ◽  
Ninhydrin Reaction ◽  
Derivatives Of

The reaction of ninhydrin with 6-amino-6-deoxy-hexopyranosyl sugars has been investigated. 6-Aldehydocyclohexaamylose and 1,2:3,4-di-O-isopropylidene-α-D-galacto-hexodialdo-1,5-pyranose have been prepared by oxidative deamination of 6-amino-deoxycyclohexaamylose and 6-amino-6-deoxy-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose, respectively, using ninhydrin. The preparation of the two aldehydes by the ninhydrin reaction is compared with the method of photolysis of the corresponding azido sugars. The mass spectra of the perdimethylsilyl derivatives of cyclohexaamylose and O-methyl oxime of 6-aldehydocyclohexaamylose have been recorded.

Thio derivatives of β-diketones and their metal chelates. XIX. Metal chelates of two new fluorinated Monothio-β-diketones and their mass spectra

1975 ◽  
Vol 28 (6) ◽  
pp. 1249 ◽  
Author(s):  
SE Livingstone ◽  
N Saha
Keyword(s):  
Mass Spectra ◽  
Metal Chelates ◽  
The Novel ◽  
Copper Chelates ◽  
Derivatives Of

The nickel(II), palladium(II), platinum(II), copper(II), zinc(II) and rhodium(III) chelates of the new fluorinated monothio-β-diketones RC(SH)=CHCOCF3 (R = Pri, Bui) and the iron(III), ruthenium(III) and cobalt(III) chelates of PriC(SH)=CHCOCF3 have been prepared. The mass spectra of all but the two copper chelates have been obtained. The novel features of the spectra are the occurrence of the ions M-(R-H), M-R, and M-LH and the loss of H2S from the ions M-LH and M-L.

scholarly journals Derivatives of 2-Aminopyridines as Inhibitors of Multidrug Resistant Staphylococcus Aureus Strains

2018 ◽  
Vol 10 (1) ◽  
pp. 153
Author(s):  
Iniobong E. Ante ◽  
Sherifat A Aboaba ◽  
Hina Siddiqui ◽  
Muhammad A Bashir ◽  
Muhammad I Choudhary
Keyword(s):  
Staphylococcus Aureus ◽  
Mass Spectra ◽  
Multidrug Resistant ◽  
Drug Resistant ◽  
Acid Chlorides ◽  
Alamar Blue ◽  
Standard Drug ◽  
Starting Point ◽  
New Compounds ◽  
Derivatives Of

A new series of 2-aminopyridine derivatives were synthesised. N-acylation of 2-amino-3-chloro-5-(trifluoromethyl) pyridine and 2-amino-5-(trifluoromethyl) pyridine with series of acid chlorides afforded a total of fourteen (14) amide compounds. The structures of the new compounds have been established by their IR, NMR and mass spectra data. All the compounds were tested for their activity against four (4) multi-drug resistant (MDR) bacteria Staphylococcus aureus strains using microplate alamar blue assay. The MDR-Staphylococcus aureus strains employed for this study were Epidermic Methicilin Resistant Staphylococcus aureus (EMRSA-17), Methicilin Resistant Staphylococcus aureus (MRSA-252), Epidermic Methicilin Resistant Staphylococcus aureus (EMRSA-16) and Pakistani Drug resistant clinical isolate of Staphylococcus aureus (PRSA). Other bacteria strains also used include Escherichia coli (ATCC 2592), Shigella flexenari (ATCC 12022), Staphylococcus aureus (NCTC 6571) and Pseudomonas aeruginosa (NCTC 10662). The synthesised compounds exhibited very good activity against the four MDR-Staphylococcus aureus strains of which most of the compounds showed higher potencies for inhibiting the growth of the strains than vancomycin, the standard drug employed. The compounds reported here may serve as the starting point for the design and development of MDR-S.aureus inhibitors as antibacterial agents.

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