Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives
By Yü-Gwan Chen
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Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives - Yü-Gwan Chen
Yü-Gwan Chen
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives
Sharp Ink Publishing
2022
Contact: info@sharpinkbooks.com
ISBN 978-80-282-3737-0
Table of Contents
INTRODUCTION
PHARMACOLOGICAL REVIEW
TINCTORIAL REVIEW
EXPERIMENTAL
Preparation of 2-methyl-4-selenoquinazolone
Analysis of Selenium Organic Compounds
Preparation of 2-Phenylbenzoselenazole
Mononitro Derivative
Monoamino Derivative
Decomposition of Monoamino Derivative
Monacetyl Derivative
Monobenzylidene Derivative
An Azo Dye
Dinitro Derivative
Diamino Derivative
Diacetyl and Dibenzylidene Derivatives
Dyeing with Azo Dyes
BIBLIOGRAPHY
VITA
INTRODUCTION
Table of Contents
The general conception of selenium is that it is a comparatively rare element. Few realize that it has been known for over a century and that over twenty selenium minerals, containing from one to sixty-six per cent. of the metal, are considered by the mining corporations as important. Beside being a by-product of sulphuric acid manufacture, it is separated also in the electrolytic refining of copper. The demand for the metal is so small that there are half a dozen concerns in the United States either willing to supply gratis any reasonable quantity for research work, or to sell it at cost. In a special report of the National Research Council on selenium(3), it is estimated that there could be produced annually, without making any material additions to the present plants, not less than 300,000 pounds.
In fact selenium has, in recent years, gradually been brought more and more to the attention of the general public through its application to military uses and other purposes. In the glass industry, for example, it was used as decolorizer during the War period. It has been found that it imparts a violet red tint to the pyrex tubing after the latter has been used for a few combustions. The coloration is especially noticeable when a broken piece is examined. This may find an important place in the ceramic industry. In turning off the gas light of the city at day