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Isatin Derivatives (isatin + derivative)

Distribution by Scientific Domains
Chemistry75%

Selected Abstracts

Investigation of the Selective Reduction of Isatin Derivatives.

CHEMINFORM, Issue 2 2004
-Hydroxyacetophenone Derivatives, 3-(Ethylenedioxy)-2-hydroxyindoline Carboxylates., Ethyl spiro-, Synthesis of
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Baylis,Hillman Reaction of Isatin Derivatives: Isatins as a New Entry for the Baylis,Hillman Reaction.

CHEMINFORM, Issue 15 2003
Yun Mi Chung
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

ChemInform Abstract: Isatin Derivatives Are Reactive Electrophilic Components for the Baylis,Hillman Reaction.

CHEMINFORM, Issue 26 2002
Simon J. Garden
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

An Efficient Synthesis of New Spiro[indolo-3(1H),2,(3,H)-oxadiazolyl] and 1-(Triazol-4-ylmethyl)isatin Derivatives.

CHEMINFORM, Issue 21 2006
Rachid Bouhfid
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Facile synthesis of 3-spiroindolines

HETEROATOM CHEMISTRY, Issue 3 2002
Yehia A. Allam
Cyanoacetyldiazoindol-2-one (3), the condensation product of cyanoacetohydrazide with isatin (1), could be cyclized in acidic medium via its CN group and its enolic OH to give cyanomethyloxadiazole-spiroindoline (4). The presence of the methylcyano side chain could be invested,through oximation, diazotization, or condensation with aldehydes,to form polyfunctional spiroindolines 5, 8,10. Also, a second route for preparing the title compound could be achieved through a nucleophilic attack on position 3 in the isatin derivatives, followed by subsequent ring closure to give 6 and 7. © 2002 Wiley Periodicals, Inc. Heteroatom Chem 13:207,210, 2002; Published online in Wiley Interscience (www.interscience.wiley.com). DOI 10.1002/hc.10020 [source]

Superelectrophilic Activation of N -Substituted Isatins: Implications for Polymer Synthesis, a Theoretical Study

MACROMOLECULAR THEORY AND SIMULATIONS, Issue 2 2009
Daniel Romero Nieto
Abstract The stability and reactivity of mono- and multi-protonatred N -substituted isatin derivatives were studied at PBE0/aug-cc-pvtz//PBE0/6-31+G** level of theory in triflic acid (TFSA) solution. Calculations showed that the monocationic intermediates are the principal reactive species in the reaction of hydroxyalkylation of isatin derivatives in TFSA media. Electron-withdrawing substituents on the nitrogen atom increase the reactivity of isatin-containing electrophiles towards aromatic hydrocarbons, in accordance with their expected electronic influence. Steric factors also play an important role in the reactivity of isatin-containing electrophiles, especially in the second reaction step, due to their more sterically hindered reactive center. [source]

Behavioural dynamics in the biological control of pests: role of silicon complexes

APPLIED ORGANOMETALLIC CHEMISTRY, Issue 11 2008
Savita Belwal
Abstract The complexes of silicon (IV) with Schiff base ligands (L1H and L2H of isatin derivatives) having a sulfur and oxygen donor system were prepared by the reactions in methanol environment. These were isolated and characterized by elemental analysis, molecular weight determinations and conductance measurements. On the basis of electronic, infrared, 1H, 13C and 29Si NMR spectral studies, trigonal bipyramidal geometry was suggested for the resulting complexes. These data support preferential binding of sulfur and oxygen atom to the silicon atom. The disease resistance activities of the ligands and their corresponding complexes were examined successfully in in vitro and in vivo experiments, against pathogenic fungi and bacteria. Results were quite encouraging and these were compared with the standard pesticides Bavistin and Streptomycin. Copyright © 2008 John Wiley & Sons, Ltd. [source]