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Recherches sur la formation et la transformation des esters LXI. Sur la réaction entre phosphite d'éthyle et les esters trifluoroacétylacétiques monochloré et monobromé, ainsi que les trifluoroacétones monochlorée et monobromée

✍ Scribed by Emile Cherbuliez; G. Weber; J. Rabinowitz

Publisher
John Wiley and Sons
Year
1965
Tongue
German
Weight
271 KB
Volume
48
Category
Article
ISSN
0018-019X

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✦ Synopsis

By treating /?-mercaptopropionic acid with aryl (aralkyl) isothiocyanates in weak alkaline medium, the authors have obtained the corresponding @-(N-aryl(aralky1)-thiocarbamoy1thio)-propionic acids which, heated 2 hours at 120°, yield the corresponding 3-aryl(aralkyl) -4-0x0-2-thiono-tetrahydrothiazines.

Z-(N-phenylthiocarbamoylthio)-l-diethylamino-ethane is obtained by treating 1-diethylamino-2-mercapto-ethane with phenyl isothiocyanate in hydrogenocarbonate + pyridine medium.

Cysteine (K or Na salts) reacted with 2 molecules of an aryl isothiocyanate in alcohol-pyridine medium at room temperature yields the corresponding N, S-diarylthiocarbamoylated derivatives which, treated with glacial acetic acid (10 vol.) f concentrated HCl (1 vol.), are transformed into the corresponding S-arylthiocarbamoylated derivatives of arylthiohydantoh-cysteine.

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