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An in-depth analysis of various organic compounds, including alkanes, alcohols, aldehydes, ketones, carboxylic acids, amines, phenols, and heterocyclic compounds. It covers their importance, nomenclature, preparation, physical and chemical properties, and chemical reactions. Additionally, it includes probable questions for each section.
Typology: Summaries
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Contents i
Pharmaceutical Organic Chemistry by Dr. V. Alagarsamy
© 2020, by Publisher, All rights Reserved
No part of this book or parts thereof may be reproduced, stored in a retrieval system or transmitted in any language or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the publishers.
Published by:
Printed at Aditya Offset Process (I) Pvt. Ltd. Hyderabad.
An imprint of Pharma Book Syndicate A Unit of BSP Books Pvt. Ltd. 4-4-309/316, Giriraj Lane, Sultan Bazar, Hyderabad - 500 095. Phone: 040-23445600, 23445688; Fax: 91+40- E-mail: info@pharmamedpress.com www.pharmamedpress.com/pharmamedpress.net
Dedication
“The two most important days in your life are the day you are born and the day you find out why you are born. In your life either write something worth reading or do something worth writing. You should dedicate yourself to your profession and do your best that should answer why you are born.”
Whatever the mind of man can conceive and believe, it can achieve. Challenges are what makes life interesting and overcoming them is what makes life meaningful. In order to succeed in your life, your desire for success should be greater than your fear of failure. It does not matter how slowly you go as long as you do not stop.
We become what we think about; hence your thoughts should always be of high-quality. Definiteness of purpose is the starting point of all achievement. If you believe you can do it you are halfway there. Whatever you can do, or dream you can, begin it. Boldness has genius, power and magic in it. It will give you the required strength. “Nothing is Impossible in the world, because the word impossible itself says, I’m possible!”
When everything seems to be going against you, remember that the aircraft takes off against the wind, not with it. That is why it is reaching the desired destination. If you compromise for others, you cannot reach your destination, instead you will reach others destination.
Life shrinks or expands in proportion to one’s courage. Limitations live only in our minds. But if we use our imaginations, our possibilities become limitless. Hence you have enough opportunities in the world if you have courage. Do what you can, where you are, with what you have. You should have a dream in your life and to achieve it if you have good idea and clear plan with full devotion, it will fetch you sure success even if the God says impossible. Because the hard work has its own power, it will never fail. You should not be a product of your circumstances. You should be a product of your decisions.
viiiviii Contents
Preface
Contents ix
Preface
Acknowledgement (xi)
xivxiv Contents
Contents xvii
Relationship between Some Aromatic
xxxx Contents
Nomenclature of Organic Compounds 9
In early days, scientists named the compounds based on historic background. For example, “wood spirit” was named so because it was obtained from distillation of wood. Later it was named as methanol based on Greek words (methu = wine and hale = wood). Similarly, the name “acetic acid” was derived from vinegar (Latin; acetum = vinegar), because the acetic acid is the major constituent of vinegar. These are called as common names or trivial names. As the number of compounds were discovered more, naming by history becomes difficult. Hence systematic naming becomes important. The systematization of names was carried out by the International congress of leading chemistry held in Geneva, 1892. Rational system of nomenclature was formed and it is called as Geneva system of nomenclature. Slight revision and improvements were carried out time to time. One such being held at Liege (Belgium) 1930 by International Union of Chemistry and it is called as IUC system of nomenclature. The IUC was later modified by the International Union of Pure and Applied Chemistry in 1958 and it is called as IUPAC system of nomenclature. To name the organic compound according to IUPAC nomenclature a set of rules were framed and all the compounds are named accordingly. However, even today some of the common names are used for organic compounds. Hence the chemists should also be aware of the common names apart from IUPAC nomenclature. Non-systemic nomenclature of organic compounds like common name, trivial name etc are described in individual chapters.
IUPAC nomenclature is been used now a days to name organic compounds. However, some of the simple compounds are named by trivial names. Earlier names have been continued even today but complex organic compound can be given using IUPAC nomenclature only. Various rules are followed for naming compounds by IUPAC system: Rule 1: Longest chain rule: “In the given organic compound longest possible chain of carbon atoms is selected and the compound is named as a derivative of this alkane.” For example, the compound given below have five carbons in horizontal line and six carbons in the longest chain hence we should select it as a hexane derivative only.
Nomenclature of Organic Compounds
1010 Pharmaceutical Organic Chemistry
Rule 2: Lowest number for substituents rule: After selecting the longest chain, the numbering should be given from one end to the other end. While giving the number, the substituents should be given lowest possible number. For example, the compound given below is named in two ways.
In first case, naming 4,7-dimethyl octane is not correct because 2,5-di methyl octane have lowest numbers for the substituents. If different alkyl groups are in equivalent positions in relation to the end of the chain, preference is given to the end where the radical has fewer carbon atoms (methyl, ethyl, etc ). In the following example, the first case of naming is correct because methyl group is given preference over ethyl group.