1979
DOI: 10.1002/jlac.197919790510
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Fünfringheterocyclen, VI. 3‐Organylamino‐1,3‐thiazolin‐2‐one und ‐2‐thione

Abstract: S-Kalium-((W-organy1hydrazino)monothio-und Kalium-[(W-organylhydrazino)dithioformiate]1 A bzw. 1 B lassen sich mit a-Halogenketonen am Mercapto-Schwefel zu rein isolierbaren (Hydrazino)thioameisensaure-acylmethylestern 2 A bzw. 2 B oder deren cyclischen Derivaten 2' A bzw. 2' B alkylieren. Diese ergeben in saurer Losung 3-Organylamino-l,3-thiazolin-2-one 3 A bzw. -2-thione 3B. Der Beweis fur das Vorliegen der funfgliedrigen Ringstruktur wurde durch chemische Reaktionen und UV-spektroskopisch erbracht. Die syn-… Show more

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“…S -Potassium hydrazinomonothio- and dithioformates 231 react with α-haloketones to give acylmethyl (hydrazino)thioformates 232 . The latter can be cyclized to 1,3-thiazolines 233 or 1,3,4-thiadiazines 234 depending upon the substitution pattern of the ketone ( Scheme 69 ) [ 464 ].…”
Section: Reactions Of α-Haloketones With Carboxylic Acids and Thementioning
confidence: 99%
“…S -Potassium hydrazinomonothio- and dithioformates 231 react with α-haloketones to give acylmethyl (hydrazino)thioformates 232 . The latter can be cyclized to 1,3-thiazolines 233 or 1,3,4-thiadiazines 234 depending upon the substitution pattern of the ketone ( Scheme 69 ) [ 464 ].…”
Section: Reactions Of α-Haloketones With Carboxylic Acids and Thementioning
confidence: 99%