etd AT Indian Institute of Science: Recent submissions
Now showing items 121-140 of 7574
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Synthetic investigations in steroids
Hydrolysis of Agave F Hydrolysis of Agave F gave only sugars, indicating that the polysaccharide was a glucan-fructosan in proportions of 92.7% (calculated) glucose and 7.3% (estimated) fructose. Hydrolysate indicates that ... -
Synthetic studies in terpenoids.
The thesis entitled “Synthetic Studies in Terpenoids” consists of seven chapters. The first chapter gives an account, for the first time, of the chemistry of oxygenated compounds of cadalene type. The succeeding four ... -
Chemistry of spironapthalelenones - synthesis and reactions of oxygen and nitrogen heterocycles
The thesis entitled "CHEMISTRY OF SPIRONAPHTHALENONES – SYNTHESIS AND REACTIONS OF OXYGEN AND NITROGEN HETEROCYCLES" is presented in four chapters and an appendix. Chapter I is divided into two sections. Section I deals ... -
Reactions of vinamidines and benzotropones and dynamic processes in norbornene-7-ols
The research described in this thesis, entitled “Reactions of Vinamidines and Benzotropones and Dynamic Processes in Norbornen-7-ols”, reflects the diversified interests of the work that is being carried out in these ... -
Studies in sesquiterpenes.
The thesis “Studies in Sesquiterpenes” is divided into three parts: Part I A brief account of the chemistry of naturally occurring cadinenes, cadinols, and related compounds possessing the cadinane skeleton has been given. ... -
Synthetic studies in anthracyclinones and ancillary topics
Section 4 illustrates another approach for the synthesis of a synthon for digitopurpone and also for the synthesis of adriamycinone (Scheme III). Scheme III 0 H?C?O?C- CO?C?H? OCH? OCH? CO?H In Section 5, a third approach ... -
synthetic investigations in terpenoids
The object of the present investigation is to develop a new strategy for the synthesis of 1-methylcyclohexa-1,3-diene derivatives, which are required for the construction of bicyclo[2.2.2]octane ring systems with bridgehead ... -
Studies in physical organic chemistry
The objects of these investigations are: (1) to study the preparation and properties of fulvenes possessing electron-withdrawing substituents at the C-6 position, in relation to the concept of anti-aromaticity, and (2) to ... -
synthetic investigations in terpenoids
The thesis entitled "SYNTHETIC INVESTIGATIONS IN TERPENOIDS: STRATEGIES OF SYNTHESIS OF ILLUDININE, EREMOLACTONE AND KHUSIOL" is mainly divided into two chapters. Chapter I deals with the synthetic studies on the fungal ... -
Excited state behaviour of a,b – unsaturated thiones
The thesis entitled “Excited State Behaviour of ?,?-Unsaturated Thiones” consists of six chapters. Chapter I provides a brief introduction to the work presented in this thesis. Chapters II–V describe the photophysical and ... -
synthesis of some naturally occurring sesquiterpenes
Syntheses of Some Naturally Occurring Sesquiterpenes” consists of six chapters. Chapter 1 describes the first total syntheses of marmelerin (10) (isolated from Croton sonderianus Muell. Arg.), its positional isomer 12, and ... -
Acid catalysed cyclisation of steroidal seco-diones-total synthesis of racemic copacamphor & their Ylangocamphor & their G-homologues..
The thesis entitled “Acid-Catalysed Cyclisation of Steroidal Seco-Diones – Total Synthesis of Racemic Copacamphor and Ylangocamphor and Their C?-Homologues” consists of three chapters. The bicyclo[3.2.1]octane ring system ... -
Synthesis and reactions of oxygen and nitrogen heterocycles..
The thesis is entitled “Synthesis and Reactions of Oxygen and Nitrogen Heterocycles” and is presented in five chapters. Chapter I deals with the synthesis of spironaphthalenones (1b) and (1c). 4-Methyl-2-naphthol was ... -
Studies on enzyme models.
The thesis entitled "Studies on Enzyme Models" is divided into three chapters. The first chapter deals with a general introduction on the mechanism of enzyme action and study of enzyme models mimicking some enzymes. The ... -
studies in opium alkaloids
The thesis entitled "STUDIES IN OPIUM ALKALOIDS: (i) SYNTHETIC UTILITY OF AMINE QUATERNIZATION (ii) MICROBIAL TRANSFORMATIONS OF MORPHINE" consists of four chapters. CHAPTER 1: CONVENIENT METHOD FOR REPLACEMENT OF TERTIARY ... -
Synthetic studies in natural products
The thesis entitled "Synthetic Studies in Natural Products (Terpenes & Lignans)" is divided into three parts consisting of nine chapters. Chapter 1 gives a review of the chemistry of aromatic hemiterpenoids of 2,2-dimethylchromene ... -
Studies on synthetic drugs : Investigations on synthetic estrogens
PART I Section A After briefly reviewing the work on synthetic estrogens, the various methods for the synthesis of 2-methyl-2-carbomethoxy-5-(p-methoxyphenyl)-cyclohexanone are detailed. This ketone has been synthesized ... -
Wiener-hopf technique and allied methods in a class of scattering problems
This thesis is devoted to the study of a class of boundary value problems arising in the scattering of electromagnetic and acoustic waves by means of the Wiener–Hopf technique and related methods. The contents are organized ...