VERFAHREN ZUR HERSTELLUNG VON 4-ALKYL- THIOSEMICARBAZIDEN

4-Alkylthiosemicarbazides of the formula Alkyl-NH-CS-NH-NH2 are produced by heating at about 40 to 90 DEG C the novel hydrazinium salts of N-alkyldithiocarbamic acids of the formula Alkyl-NH-CS-S- +NH3-NH2 in a solvent while removing by-product H2S as by use of vacuum or passage of an inert gas thro...

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Hauptverfasser:	HELLRUNG,GUENTHER,DR, KRANZ,ECKART,DR, CRAMM,GUENTHER,DR
Format:	Patent
Sprache:	ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	4-Alkylthiosemicarbazides of the formula Alkyl-NH-CS-NH-NH2 are produced by heating at about 40 to 90 DEG C the novel hydrazinium salts of N-alkyldithiocarbamic acids of the formula Alkyl-NH-CS-S- +NH3-NH2 in a solvent while removing by-product H2S as by use of vacuum or passage of an inert gas through the reaction mixture, advantageously in the presence of a catalytic amount of sulfur to speed up the reaction. Hydrazine hydrate may also be present. The hydrazinium salt starting material can be prepared by reacting the corresponding alkylamine, ammonia, carbon disulfide and hydrazine, and the reaction solution directly employed in the heating step of the present invention without isolation of the intermediate.