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The Preparation and Properties of the Perchlorates of Some Choline Esters*†

✍ Scribed by Bell, Frederick K. ;Jelleff Carr, C.

Publisher
Elsevier
Year
1947
Weight
205 KB
Volume
36
Category
Article
ISSN
0095-9553

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✦ Synopsis

The preparation and properties of acetyl, benzoyl, furoyl, and thenoyl choline perchlorates are described. It is shown that perchloric acid may be used to isolate choline esters from their reaction:mixtures.

HE PREPARATION of a number of choline Testers which were desired for pharmacologic study in this laboratory was greatly facilitated by the observation that acetyl choline can be readily obtained in a welldefined crystalline form as the perchlorate salt. Furthermore, even casual observation revealed that this salt showed considerable stability toward atmospheric moisture in marked contrast to the well-known behavior of the chlorides of most of the choline esters that have been prepared. Our hope that the desired choline esters would also yield similar perchlorate salts was fulfilled.

A survey of the literature reveals that little attention has been given to the preparation of the perchlorate salts of choline esters. Hofmann and Hobold (1) have prepared and described in detail choline perchlorate and the nitrate ester of choline perchlorate. In accord with their recommendations, the latter compound has been found very satisfactory for the identification of choline (2) and its pharma:ology has been investigated in this laboratory (3). Binet and Burstein (4) studied the action of pro--~

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