etd AT Indian Institute of Science: Recent submissions
Now showing items 421-440 of 8174
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Studies in sulphanilamides and sulphones
STUDIES IN SULPHANILAMIDES AND SULPHONES SECTION A: STUDIES ON SULPHANILAMIDES Part I: Introduction This part deals, in brief, with (i) the history and advance of chemotherapy, (ii) discovery and development of the ... -
Synthetic approaches towards 1,24-dihydroxyvitamin D3 and analogues
A formal total synthesis of 1?,24(S)- and 1?,24(R)-dihydroxyvitamin D? (14 and 13) starting from the abundantly available cholic acid (71) is described in this chapter. Cholic acid (71) was first converted into methyl ... -
Study of transient state structures of quinones from Resonance Raman Spectroscopy
The time-resolved resonance Raman spectra of the triplet excited state, radical anion, and semiquinone radical of bromanil have been recorded. Observed vibrational modes have been assigned for all three transient species ... -
investigation of vilsmeier- haack reaction on homoallyic
The thesis entitled "Investigation of Vilsmeier-Haack Reaction on Homoallylic, Allylic and Benzylic Alcohols" consists of seven chapters. Chapter 1 contains an account of the investigation of Vilsmeier reaction on the ... -
Supramolecular chemistry : A bile acid based approach
Chapter 1 Contains three parts: Part A – Describes the design, synthesis, and evaluation of a bile acid-based adenine/biotin receptor. Part B – Discusses the site-specificity of adenine binding observed for aliphatic and ... -
Carbon, oxygen- and nitrogen (six membered ring) annulations
The thesis entitled "Carbon-, Oxygen- and Nitrogen- (Six Membered Ring) Annulations by Vilsmeier Reaction" consists of six chapters. Chapter 1 describes the results of investigations of the Vilsmeier reaction on known ... -
Ru(II)-catalyzed C-H activation: Amide-directed 1,4-addition of Ortho C-H bond to maleimides
Transition metal-catalyzed functionalization of C–H bond to C–C bond is advantageous and atom-economical. The use of directing groups is intended to overcome the challenges associated with C–H activation, such as low ... -
New methodologies for oxidation using peroxides mediated by Oxo-Chromium(VI) and Oxo-Boron(III) compounds
Part A: Oxidative Transformations with PDC/t-BuOOH Part A of this thesis focuses on oxidative transformations using the pyridinium dichromate (PDC)/tert-butyl hydroperoxide (t-BuOOH) reagent system. Chapter 1 describes a ... -
New methodologies for oxidation using peroxides mediated by Oxo-Chromium(VI) and Oxo-Boron(III) compounds
Hydrogen fluoride is one of the most inexpensive fluorinating reagents, used for fluorinations, but its use generally requires work under pressure due to its low boiling point. To overcome this difficulty, it has been found ... -
Synthesis and evaluation of catalytic supramolecular aggregates
The thesis titled "Synthesis and Evaluation of Catalytic Supramolecular Aggregates" describes the efficiency of various organized assemblies consisting of several newly developed amphiphiles that are covalently attached ... -
Chemistry of tetrathiomolybdate : Application in organic synthesis
Chemistry of Tetrathiomolybdate: Applications in Organic Synthesis K. R. Prabhu, Department of Organic Chemistry, IISc, Bangalore This thesis deals with the chemistry of benzyltriethylammonium tetrathiomolybdate, ... -
synthesis of some naturally occurring sesquiterpenes
The thesis entitled "SYNTHETIC STUDIES IN SESQUITERPENES" consists of four chapters. Chapter I deals with the general introduction to the thesis, which outlines the broad classification of the sesquiterpenes and, in ... -
Theoretical studies of novel electronic effects in radicals and radical ions
The thesis entitled "Theoretical Studies of Novel Electronic Effects in Radicals and Radical Ions" consists of five chapters. Chapter I is a general introduction to the various techniques that are commonly employed to study ... -
Synthetic investigations on morellin
The thesis entitled "Synthetic Investigations on Morellin" is divided into three sections. Morellin (1), a polyisoprenylated xanthone, was isolated from Garcinia morella and shown to possess high antistaphylococcal activity. ... -
Modification of photochemical reactivity by incorporation of organic molecules in organised media and photocycloaddition reactions ....
The thesis entitled (i) "Modification of Photochemical Reactivity by Incorporation of Organic Molecules in Organised Media" (ii) "Photocycloaddition Reactions of Thiocoumarin" consists of five chapters. Chapter 1 provides ... -
Studies on nonlinear optical materials and photochemical reactions in the crystalline state by X-ray crystallography
The thesis entitled "Studies on Nonlinear Optical Materials and Photochemical Reactions in the Crystalline State by X-ray Crystallography" has been divided into two parts. Part I deals with X-ray structural investigations ... -
Facile routes to substituted DI-and triformylbenzenes (part-I). synthesis of pterosin M and Onitin (part- II).
The thesis, dealing with two topics in two parts, is entitled "Facile Routes to Substituted Di- and Triformylbenzenes (Part I). Synthesis of Pterosin M and Onitin (Part II)". The first part, consisting of five chapters, ... -
synthetic studies in emmotins and related compounds
The thesis entitled "SYNTHETIC STUDIES IN EMMOTINS AND RELATED COMPOUNDS" consists of seven chapters. Chapter 1, the total synthesis of emmotin-G (12), a sesquiterpene occurring in Emmotum nitens, is described. The ...