Ein Beitrag zur Reaktivität des Monohydrazids von P3N3F6 / A Contribution to the Reactivity of the Monohydrazide of P3N3F6

1974 ◽  
Vol 29 (3-4) ◽  
pp. 177-180 ◽  
Author(s):  
Herbert W. Roesky ◽  
Enno Janssen
Keyword(s):  
Molecular Weight ◽  
Mass Spectra ◽  
Carbonic Acid ◽  
Acid Chlorides ◽  
Aldehydes And Ketones

P3N3F5NHNH2 reacts with P3N3F5Br to yield the symmetric hydrazide P3N3F5-NHNHP3N3F5. Compounds of the type P3N3F5NHNHC(O)CX3 and P3N3F5NHN = CX2 are readily prepared from P3N3F5NHNH2 and carbonic acid chlorides and respectively aldehydes and ketones.The reaction product of P3N3F5NHNH2 and CH3CH2CHO gives a dimeric derivate. Its structure was proofed by molecular weight, IR- and mass spectra.

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.

Synthesis of Cyclic Polysulfides and their Properties as Curing Agents

2004 ◽  
Vol 77 (2) ◽  
pp. 380-390
Author(s):  
Wonmun Choi ◽  
Tomoyuki Matsumura
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Tensile Strength ◽  
High Molecular Weight ◽  
Mass Spectra ◽  
Elongation At Break ◽  
Molecular Weights ◽  
Aging Properties ◽  
Curing Agents ◽  
Polysulfide Polymer

Abstract The reactions of dichloroalkanes and sodium tetra-sulfide (Na2S4) were carried out in a mixture of water and toluene to produce corresponding cyclic polysulfides and polysulfide polymer. The low molecular weights of cyclic sulfides were obtained by the reaction at 90 °C, while the high molecular weight of polysulfide polymer was obtained by the reaction at 50 °C. GPC chromatograms and Mass spectra revealed that the structures of cyclic polysulfide were 1:1, 2:2, and 3:3 adducts of dichloroalkane and sodium tetra-sulfide. The mechanical properties of vulcanized NR at 148 °C with cyclic sulfides were similar to that with sulfur. However, both tensile strength and elongation at break of vulcanized NR at 170 °C with cyclic sulfides are much higher than that with sulfur. The aging properties of vulcanized NR at 148 °C or 170 °C with cyclic polysulfides indicate better stability.

An effective one-pot conversion of acid chlorides to aldehydes and ketones

2013 ◽  
Vol 54 (24) ◽  
pp. 3199-3203 ◽  
Author(s):  
Jae Kyo Park ◽  
Won Kyu Shin ◽  
Duk Keun An
Keyword(s):  
Acid Chlorides ◽  
One Pot ◽  
Aldehydes And Ketones

Near-threshold photoionization mass spectra of combustion-generated high-molecular-weight soot precursors

2013 ◽  
Vol 58 ◽  
pp. 86-102 ◽  
Author(s):  
Scott A. Skeen ◽  
Hope A. Michelsen ◽  
Kevin R. Wilson ◽  
Denisia M. Popolan ◽  
Angela Violi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Mass Spectra ◽  
Soot Precursors ◽  
Near Threshold

scholarly journals SYNTHESIS AND CHARACTERIZATION OF ACETYLATION OF SUPRA MOLECULAR DENDRIMERS

2021 ◽  
Vol 10 (4) ◽  
pp. 3430-3434
Author(s):  
Hemant Khambete
Keyword(s):  
Molecular Weight ◽  
Size Distribution ◽  
Blood Cells ◽  
Mass Spectra ◽  
Synthesis And Characterization ◽  
Time Duration ◽  
Standard Data ◽  
Ft Ir ◽  
Hemolytic Toxicity

Supra molecular dendrimers have emerged as one of the most interesting themes for researchers work as a result of unique functional architecture and macromolecular characteristics. The main drawback of Supra Molecular dendrimers is, due to presence of –NH2 group at the surface, it causes hemolytic toxicity and hence toxic for the blood cells. In this article, we have systematically modified the surface groups of amine-terminated Supra Molecular dendrimers with acetyl groups. The reported methods of Acetylation are very time consuming and multistep which require large amounts of chemicals. In present work we have synthesized Acetylation Supra Molecular dendrimers using 1-ethyl 3- [3-(dimethylamino) propyl] carbodiimide (EDC) as a cross linking agent. The Acetylated dendrimers were evaluated by color reaction, UV, FT-IR, DSC, Size distribution, NMR and ESI Mass Spectra studies and compared with standard data. The absolute molecular weight and molecular weight distribution of 4.0 G and Acetylated Supra Molecular dendrimers were determined respectively by Size distribution and ESI Mass Spectra respectivel. The results revealed that our approach for Acetylation gives considerable amount of Acetylation, cheap, elimination for ganic solvent, requires less time duration and hence gives a better option for Acetylation of dendrimers.

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