Nitrones and oxaziridines. XIII. A convenient method for the oxidation of primary- and secondary-alkyl amines to carbonyl compounds

1975 ◽  
Vol 28 (11) ◽  
pp. 2547 ◽  
Author(s):  
DSC Black ◽  
NA Blackman
Keyword(s):  
Convenient Method ◽  
Carbonyl Compounds ◽  
Good Yield ◽  
Acidic Hydrolysis ◽  
Alkyl Amines ◽  
Hydrolysis Of

Primary- and secondary-alkyl amines have been converted in good yield into the related carbonyl compounds by sequential conversion into isopropylidene imines and 3,3-dimethyloxaziridines, followed by acidic hydrolysis of the latter. Intermediates need not be isolated.

scholarly journals Facile access to oleuropein and hydroxytyrosol from Ligustrum vulgare-a plant material growing all over Eurasia

2018 ◽  
Vol 7 (3) ◽  
pp. 217-222 ◽  
Author(s):  
Josephine M Gießel ◽  
Anne Zaar ◽  
Renate Schäfer ◽  
Ahmed Al-Harrasi ◽  
René Csuk
Keyword(s):  
Good Yield ◽  
Plant Material ◽  
Acidic Hydrolysis ◽  
Ligustrum Vulgare ◽  
Hydrolysis Of

Leaves of Ligustrum vulgare are an alternative, sustainable source for oleuropein. Acidic hydrolysis of oleuropein furnishes hydroxytyrosol in good yield. This approach is one of the most convenient ways to access significant amounts of oleuropein as well as of hydroxytyrosol from plant material readily accessible all over the year and throughout Eurasia. Harvesting the leaves in winter doubles the amount of oleuropein that can be extracted from the plant material.

A FACILE SYNTHESIS AND REACTIONS OF AMINO SELENOLO[2,3-b]PYRIDINE CARBOXYLATE

2015 ◽  
Vol 12 (1) ◽  
pp. 3910-3918 ◽  
Author(s):  
Dr Remon M Zaki ◽  
Prof Adel M. Kamal El-Dean ◽  
Dr Nermin A Marzouk ◽  
Prof Jehan A Micky ◽  
Mrs Rasha H Ahmed
Keyword(s):  
Biological Activity ◽  
Carbonyl Compounds ◽  
Mass Spectra ◽  
The Other ◽  
Pyridine Derivatives ◽  
Facile Synthesis ◽  
High Biological Activity ◽  
Basic Hydrolysis ◽  
Pyridine Carboxylate ◽  
Hydrolysis Of

 Incorporating selenium metal bonded to the pyridine nucleus was achieved by the reaction of selenium metal with 2-chloropyridine carbonitrile 1 in the presence of sodium borohydride as reducing agent. The resulting non isolated selanyl sodium salt was subjected to react with various α-halogenated carbonyl compounds to afford the selenyl pyridine derivatives 3a-f  which compounds 3a-d underwent Thorpe-Ziegler cyclization to give 1-amino-2-substitutedselenolo[2,3-b]pyridine compounds 4a-d, while the other compounds 3e,f failed to be cyclized. Basic hydrolysis of amino selenolo[2,3-b]pyridine carboxylate 4a followed by decarboxylation furnished the corresponding amino selenolopyridine compound 6 which was used as a versatile precursor for synthesis of other heterocyclic compound 7-16. All the newly synthesized compounds were established by elemental and spectral analysis (IR, 1H NMR) in addition to mass spectra for some of them hoping these compounds afforded high biological activity.

Insights into the Inhibition of Acidic Hydrolysis of Cellulose by Its Solation

2018 ◽  
Vol 6 (8) ◽  
pp. 10999-11007 ◽  
Author(s):  
Gongzhe Chen ◽  
Xicheng Wang ◽  
Yijun Jiang ◽  
Xindong Mu ◽  
Haichao Liu
Keyword(s):  
Acidic Hydrolysis ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

DC Polarographic and Spectrophotometric Determination of Ampicillin Capsules

1980 ◽  
Vol 63 (5) ◽  
pp. 1049-1051
Author(s):  
Juan A Squella ◽  
Luis J Nunez-Vergara ◽  
Maximo Aros
Keyword(s):  
Absorption Band ◽  
Spectrophotometric Determination ◽  
Degradation Product ◽  
Uv Absorption ◽  
Acidic Hydrolysis ◽  
Average Recovery ◽  
Polarographic Wave ◽  
Spectrophotometric Methods ◽  
Hydrolysis Of

Abstract Polarographic and spectrophotometric methods are proposed for the determination of ampicillin in capsules. Acidic hydrolysis of ampicillin with 1% HCHO in 0.3N HCl yields a degradation product identified as 2-hydroxy-3-phenyl-6-methylpyrazine. This compound has a well defined UV absorption band at 380 nm and a polarographic wave at –0.55 V vs SCE, which can be used for analytical purposes. Individual capsule assays, composite assays, and recovery studies are described. The average recovery values and standard deviations (SD) for UV and polarographic determinations were 99.20% (SD 0.95) and 100.85% (SD 1.09), respectively

Synthesis of Symmetrical Dipurine-Nucleoside Diphosphates from the Corresponding Nucleoside Phosphoropiperidates

2014 ◽  
Vol 1023 ◽  
pp. 55-58
Author(s):  
Xiao Chuan Li ◽  
Shan Shan Gong ◽  
Qi Sun
Keyword(s):  
Efficient Method ◽  
Good Yield ◽  
Purine Bases ◽  
Hydrolysis Of

A general and efficient method for the preparation of symmetrical dinucleoside diphosphates with purine bases has been developed. Ap2A and Gp2G were synthesized from the in situ hydrolysis of corresponding nucleoside 5′-phosphoropiperidates with 4,5-dicyanoimidazole as the activator. This method features easily accessible starting materials, simple procedures, and good yield.

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