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

by Yü-Gwan Chen

and Se again most powerful of the whole series.
and :Se again most powerful of the whole series.

simplicity, is that of Babriel and Stelzner(52),
simplicity, is that of Gabriel and Stelzner(52),

on cooling was filtered out and recrystalized from dilute alcohol.
on cooling was filtered out and recrystallized from dilute alcohol.

a sealed tube at 110° with alcohol saturated at zero degree with
a sealed tube at 110° with alcohol saturated at zero degrees with

It was prepared from Sodium hydroxide in absolute alcohol
It was prepared from sodium hydroxide in absolute alcohol

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.