2 edition of Studies of 1,2-quinone monooximes and their use in synthesis. found in the catalog.
Studies of 1,2-quinone monooximes and their use in synthesis.
Dinesh V. Raghvani
Written in English
|Contributions||University of North London.|
|The Physical Object|
|Number of Pages||261|
The total synthesis of quinine, a naturally-occurring antimalarial drug, was developed over a year period. The development of synthetic quinine is considered a milestone in organic chemistry although it has never been produced industrially as a substitute for natural occurring quinine. The subject has also been attended with some controversy: Gilbert Stork published the first. Abstract. Substituted tricyclic or tetracyclic quinoxalines, tricyclic pyridoquinoxalines and bis-quinoxalines were synthesized in high yields starting from cyclic ketones by the α-bromination of cyclic ketones with N-bromosuccinimide (NBS) followed by condensation of the resulting α-bromo ketones with 1,2-diaminobenzene, 3,4-diaminopyridine, or 3,3′ by: 9.
During sulfurization studies of 1,4‐benzoquinones monooximes 8, Oleg and coworkers serendipitously discovered the mindboggling synthesis of an array of complex sulfur rich heterocycles. Treatment of comparatively simple starting materials such as trialkylamines25‐27 or dialkylsulfides28 with the powerful. were synthesized to study their spectral behaviour, solvatochromism, acid-base properties, and antimicrobial activities. This study discloses the activity of former quinoid ring in cyanine dyes when applied as photosensitizes These dyes are characterized by elemental analysis, IR, 1H NMR, and electronic absorption spectra.
Anthra[1,2-c]-1,2,5-oxadiazole-6,dione (I) readily reacts with ammonia and primary and secondary amines, being converted with a yield of about 80–83% into the corresponding 4-amino derivatives of antnra[1,2-c]-1,2,5-oxadiazole-6,dione(III).Cited by: 1. Comment. 1,2-Quinone monooximes (2-nitrosophenols) are good chelating agents which form stable colored complexes with a wide range of metal ions (Chakravorty, ; Charalambous et al., ; Djinovic et al., ; Liu et al., ).Increasing attention is also being devoted to these complexes in recent years because of their applications in organic synthesis (Gharah et al., ).Author: N. Dinh Do, O. Kovalchukova, A. Stash, S. Strashnova.
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Studies of 1,2-quinone monooximes and their use in synthesis. By D.V. Raghvani. Abstract. SIGLEAvailable from British Library Document Supply Centre-DSC:DXN / BLDSC - British Library Document Supply CentreGBUnited Kingdo Topics: 07B - Inorganic chemistry Author: D.V.
Raghvani. Studies of 1,2-quinone monooximes and their use in synthesis. Author: Raghvani, Dinesh V. ISNI: Awarding Body: University of North London Current Institution: London Metropolitan University Date of Award: Availability of Full Text. X-ray crystallographic studies of 5-HxqoH, 5-EtMeqoH and 5- have shown ail three compounds to have some 1,4-oxime- imino character.
The synthesis of nlckel(ll), copper(ll), palladium(ll) and platinum(ll) complexes of the acylamino and alkylamino substituted benzoqulnone oximes both by the direct and nitrosation methods Author: Terrance Augustine Thomas. 1,2-Quinone monooximes (2-nitrosophenols ; 1) have been known for some time.' These chelating agents form stable, highly coloured complexes with a wide range of metal ions.
To date, most studies of quinone monooxime complexes have focused on the transition metal complexes.2 In contrast, only a few reports on the main-group metal complexes have been published.'Cited by: 5. ChemInform Abstract: Reaction of 1,2-Quinone Monooximes and Their Metal Complexes with Dimethyl Acetylenedicarboxylate.
Article in ChemInform 27(11) March with 2. Introduction Interest in copper(II) bis-chelated complexes of o- quinone monooximes [referred to as Cu(qo)2] arises from their extensive reactivity .
It seems likely that, in all the described reactions, a pre- liminary step involves the formation of adducts between the potentially basic reagent (and/or the solvent) and the copper(II) by: Reactions of Acenaphthylene-1,2-quinone Monoxime with Some Phosphorus Ylides.
- Synthesis of Acenaphtho [1,2-x]-Fused Compounds. Liebigs Annalen der Chemie(4), DOI: /jlac Konrad B. Becker. The Synthesis of Cycloalkenes by the IntramolecularWittig by: New 2(1H)-quinoxalinones and their hexahydro derivatives were prepared for investigating their antimicrobial and antiinflammatory activities.
The study showed that thiosemicarbazide 6a derived from the hexahydro-2(1H)-quinoxalinone series has nearly the same antibacterial activity as the reference drug ciprofloxacin. Moreover, the 2(1H)-quinoxalinones bearing Cited by: Synthesis and Antidepressant Evaluation of Three para-Benzoquinone Mono-oximes and Their Oxy Derivatives Article (PDF Available) in Molecules 11(2) February with 35 Reads.
• Partial synthesis by Prelog and Prostenik in • First formal total synthesis by Woodward and Doering in • First stereoselective synthesis of quinidine by Uskokovic and Gutzwiller in • First stereoselective synthesis of quinine by Stork et.
in • Synthesis of quinine and quinidine by Jacobsen et. in Size: KB. A series of monomethoxybenzothieno[2,3‐c]quinolines 24‐28 were prepared by photocylization of the appropriate 3‐chloro‐N‐phenylbenzo[b]thiophene‐2‐carboxamides 9–13 to benzothieno[2,3‐c]quinolin‐6(5H)‐ones 14‐18 followed by chlorination to 6‐chlorobenzothieno[2,3‐c]quinolines 19‐23 then dechlorination resulting in the title compounds Cited by: Multiple Choice Questions- Chemistry and Metabolism of nucleotides (Solved) Which is the rate limiting step of pyrimidine synthesis that exhibits allosteric inhibition by cytidine triphosphate-a) Aspartate transcarbamoylase Some Multiple Choice Questions and their key le Size: 86KB.
18 Ameen Ali Abu -Hashem: Synthesis, Reactions and Biological Activity of Quinoxaline Derivatives. N Cl N N S NH O H. N O N N S N O N N Ph H. C N N N S N O N N Figure 9. Quinoxalinone derive. As potential anti-inflammatory and analgesic activity.
Synthesis of Quinoxaline derivatives. via. Different Methods. (). Studies on Quinones. Synthesis of Quinones from Hydroquinones by Using Manganese Dioxide and Acid-Impregnated Manganese Dioxide1.
Synthetic Communications: Vol. 13, No. 5, pp. Cited by: A series of three para-benzoquinone mono-oximes and four oxy-derivatives were prepared and tested for their antidepressant properties. The (4E) oxime of 2-isopropyl methyl-para-benzoquinone (4) and the corresponding 2-diethylamino-ethyl derivative (10) present antidepressant activities and were slightly more potent than the reference by: Stimulated by its success in both bioconjugation and surface modification, we studied the strain-promoted oxidation-controlled cycloalkyne–1,2-quinone cycloaddition (SPOCQ) in three ways.
First, the second-order rate constants and activation parameters (ΔH⧧) were determined of various cyclooctynes reacting with 4-tert-butyl-1,2-quinone in a SPOCQ reaction, yielding values for ΔH⧧ of 4 Cited by: 5.
Nitrosation of 3-methoxyphenol and 1-naphthol were examined under both acidic (NaNO2−EtCO2H−H2O) and basic (i-AmNO2−K2CO3−DMF) conditions.
Acidic nitrosations afforded ortho-directed products, whereas para-directed nitrosations were observed under basic conditions to yield p-quinone monooximes. The basic para-directed nitrosation was further examined using 15 phenols, Cited by: Synthesis and Antimicrobial Activity of Some Derivatives on the Basis (7-hydroxyoxo-2H-chromenyl)-acetic Acid Hydrazide.
Journals. Information. Institutional Open Access Program (IOAP) Sciforum Preprints Scilit SciProfiles MDPI Books Encyclopedia MDPI Blog Follow MDPICited by: Complete schematic view of the Quinine's synthesis performed by Robert B.
Woodward. Abstract A novel synthesis of thioxo-quinazolino[3,4-a]quinazolinone framework was developed through a four-step reaction starting from isatoic anhydride. The resulting 2-aminobenzamides from the reaction of isatoic anhydride and different amines underwent coupling–cyclization reaction with 2-nitrobenzaldehydes, reduction of nitro group, and then cyclization reaction with carbon disulfide (CS2).Cited by:.
The use of K 2 S 2 O 8 and DMSO enables an efficient and transition-metal-free synthesis of 4-arylquinolines from readily available aryl alkynes and anilines with a diverse range of substitution patterns. DMSO acts as one carbon source, thus providing a highly atom-economical and environmentally benign approach for the synthesis of 4.The First Stereoselective Total Synthesis of Quinine Gilbert Stork, Deqiang Niu, A.
Fujimoto, Emil R. Koft, James M. Balkovec, James R. Tata and Gregory R. Dake J. Am. Chem. Soc., - N OMe N H OH Presented by Jennifer EddyFile Size: 4MB.Categories: Synthesis of N-Heterocycles > benzo-fused N-Heterocycles > Synthesis of 4-quinolones. Recent Literature. A Co(III)-catalyzed enaminone-directed C-H coupling with dioxazolones and subsequent deacylation of an installed amide group provides quinolones, an important heterocyclic scaffold for diverse pharmaceutically active structures.