Division of Chemical Sciences: Recent submissions
Now showing items 261-280 of 1275
-
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Studies on catalytic of technical importance carbon monoxide at high pressures
A comprehensive study has been made on the pressure-vapour phase synthesis of (i) Acetic acid by the reaction of methyl alcohol and carbon monoxide, and (ii) Propionic acid by the reaction of ethyl alcohol and carbon ... -
Adsorption of gases on catalysts of technical importance
Studies have been carried out in their entirety concerning the adsorption of carbon monoxide on cobalt catalysts containing Co 100, Thoria 10, and Kieselguhr 200#. Progression of small aggregate cobalt oxide on the catalyst ... -
Studies in the catalytic conversion of ethanol to butadeine
Ethanol obtained from molasses (a by-product of the Indian sugar industry) can be utilized for the production of butadiene. Butadiene can readily be polymerized to yield synthetic rubber, which is of great significance ... -
Nucleophilic Boron Chemistry: Catalytic approaches to C-X (X= Br, Cl, O, N) Bond Activation in Metal/Metal-free Conditions
The boron-carbon bond occupies a central position in organic synthesis, functioning as a versatile “universal connector” to a broad range of functional groups. As a result, organoboranes have become indispensable synthetic ... -
The Reactions of Coordinated ligands - A STU D Y O F THE REACTIVITY OF CO O R D IN ATED β-Diketones, β-Ketoimines, and Thio-β-Diketones
Reactions of some Schiff-base complexes of diacetoxy boron with phenylisocyanate and nitrosating reagents have been investigated. Phenylisocyanation produces phenylamido-substituted derivatives by electrophilic attack by ... -
Theory of electrochemical phase formation
In underpotential deposition (UPD), as in other examples of ECPF, many basic questions are yet unresolved. One such question is: Does UPD involve adsorption or phase transition Despite varied experimental observations, ... -
Studies on perovskite type rare earth transition metal oxides as oxidation catalysts
The introductory chapter begins with a classification of the thermal decomposition of solids, followed by a brief account of the decomposition of simple and complex oxalates as well as complex nitrites. The salient features ... -
Reactivity of metastable solids to heat
The thesis embodies investigations on the thermal decomposition of barium azide and the thermal decomposition and sublimation of ammonium perchlorate (AP). A lot of work has been done on the thermal decomposition of these ...