Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives: Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Faculty of Pure Science of Columbia UniversityChen, Yü-Gwan
Science
Synthesis of 2-methyl-4-selenoquinazolone, 2-phenylbenzoselenazole, and its derivatives: Dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Faculty of Pure Science of Columbia University
Chen, Yü-Gwan
Organic compounds -- Synthesis; Selenium; Thesis (Ph. D.)
a sealed tube at 110° with alcohol saturated at zero degree with
a sealed tube at 110° with alcohol saturated at zero degrees with
took an hour and half. The flask was removed from the oil
took an hour and a half. The flask was removed from the oil
The precipitrate was recrystallized several times
The precipitate was recrystallized several times
(e) An attempt was made to make o-aminobenzselenamide,
(e) An attempt was made to make o-aminobenzoselenamide,
It dissolves readily in alkalies and is slightly soluble
It dissolves readily in alkalis and is slightly soluble
This was found to be desirable when the dinitroselezazole was burned.
This was found to be desirable when the dinitroselenazole was burned.
into a large volume of water when the selenozole precipitated out
into a large volume of water when the selenazole precipitated out
it was necessary to dissolve in hot HCl again and to recrystalize.
it was necessary to dissolve in hot HCl again and to recrystallize.
(b) 106 grams of benaldehyde were heated with 93 grams of
(b) 106 grams of benzaldehyde were heated with 93 grams of
It is difficulty soluble in ethyl alcohol, ethyl acetate, and
It is difficultly soluble in ethyl alcohol, ethyl acetate, and
toluene, benzene, alcohol, and difficulty soluble when cold.
toluene, benzene, alcohol, and difficultly soluble when cold.
from alcohol in fine yellowish needles, melting at 201.2°202.3°C
from alcohol in fine yellowish needles, melting at 201.2°-202.3°C
carbontetrachloride, acetone, but difficulty soluble in ligroin.
carbontetrachloride, acetone, but difficultly soluble in ligroin.
19 grams of nitric and 30 grams of sulphuric acids was introduced
19 grams of nitric and 30 grams of sulphuric acids) was introduced
in the same manner as the reduction of mononitro derivative
in the same manner as the reduction of the mononitro derivative
This diamino compound crystalizes in yellowish glistening needles
This diamino compound crystallizes in yellowish glistening needles
compounds were also prepared from this diamino derivatives.
compounds were also prepared from these diamino derivatives.
The former crystalizes in cubes from dilute alcohol;
The former crystallizes in cubes from dilute alcohol;
End of the Project Gutenberg EBook of Synthesis of
2-methyl-4-s, by Yü-Gwan Chen
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