Synthesis

subjected to numerous studies to investigate its biological activity and has been a target for total synthesis 4. Scheme 1. A few examples of pyrrolo[1,2-a]quinoline-containing natural products and pharmaceuticals. Pyrrolo[1,2-a]quinoline (Fig 5.2) and synthesis of its derivatives were reviewed in 2003 by El-Sayed and El-Sayed 5. In literature, new methods or the

Figure 8. Structure of Biaryl 1.5 Tellurium Chemistry Tellurium is a metalloid belonging to group VI in the periodic table. It has many applications in organic synthesis, alloys in machining process, and improves fabrication properties. Organotellurium compounds have much wide range of applications in metallurgy, agrochemical industry and material science.17 1.6 Research Objective The main aim of our research is

It is a very important reaction for the synthesis of the larged fused heterocyclic compounds. Researchers have developed a lot of series of fused heterocycles and analyzed them for their physiological and therapeutic effect. Many new drugs are there in the market that are being synthesised from

Microcontroller and Sensors Based Gesture Vocalizer Abstract: - Gesture Vocalizer is a large scale multi-microcontroller based system being designed to facilitate the Communication among the dumb, deaf and blind communities and their communication with the normal people. This system can be dynamically reconfigured to work as a “smart device”. In this paper, microcontroller and sensors based gesture vocalizer is presented. Gesture vocalizer discussed is basically a data glove and a microcontroller

human language by computer. The base paper for the implementation of our project is “Natural Language processing techniques in Text-To-Speech synthesis and Automatic Speech Recognition” Here the base paper we referred depicts usage of natural language processing techniques which includes the production of audio from the input text i.e., text to speech synthesis and the inverse process i.e., automatic speech recognition. From this paper we

Objective: Present research work is carried out for rapid development of some biological active new heterocyclic moieties. Method: A novel series of 3-substituted-1-[1-(toluene-4-sulfonyl)-1H-benzoimidazol-2-yl]-propen-1-one (3a-3j) were synthesized by tosylation of benzimidazole chalcones (2a-2j) using ultrasound in lesser time with higher yields. All the synthesized compounds were characterized by Elemental analysis, IR spectra, 1H, 13C NMR and Mass spectroscopy. The newly synthesized compounds

In order to improve photolytic deprotection with enhanced efficeincy, several other photoremovable groups have been developed. Figure X.X.X shows o-nitrobenzyl protecting group together with other common photolabile protecting groups such as 1-(o-nitrophenyl)ethyl (NPE), 2-(o-nitrophenyl)-propyl (NPP), 6-nitroveratryloxycarbonyl (NVOC), 2,2-bis(2-nitrophenyl)ethoxycarbonyl (diNPEOC), 4-N-[2-(2-nitropehnyl)-propoxy]carbonyl (NPPOC), 1-(3-nitrodibenzofuran-1-yl)ethyl (NDBF), 6-nitropiperonyloxymethyl

who are looking for better and reliable methods to access new and potentially useful materials. Microwaves devices designed specifically for chemical synthesis thus make things easier for industrial and academic chemists alike.1 So, this technique becomes a widely accepted energy source for performing chemical reactions. Although microwave synthesis is relatively a modern technique, the first synthetic application was reported in 1971.2 However, considerable attention in the field was observed in

Discussion 2.1 Synthesis of 1,3-butadienes 1,3-butadienes can be synthesised from aldehydes and ketones using the Wittig reaction. The Wittig reaction facilitates the synthesis of new carbon-carbon double bonds at specific locations in aldehydes and ketones (Bernard & Ford, 1983). The overall reaction mechanism is shown in Figure 4. Figure 4. The Wittig Reaction - Formation of a transitional oxaphosphetane and resultant formation of a new carbon-carbon alkene bond resulting in the synthesis of 1,3-butadienes

RING CONTRACTION All the carbons of a ring are equivalent (a ring has no ends like an open-chain compound does),1 ring compounds can be classified as either monocyclic or polycyclic compounds. As the word “contraction” means shrinking, ring contraction can be defined as the process of shrinking larger ring compounds which are less strained into a more strained smaller ring structures. Instead of making small strained ring by chemical reaction which is very strenuous to do, ring contraction is a process