Preparation of lower alkyl thiosemicarbazides

Details Preparation of lower alkyl thiosemicarbazides Preparation of lower alkyl thiosemicarbazides

1978-10-26

1980-12-02

Waltz, Thomas A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C15900

Patent

active

042370663

ABSTRACT:
A process for the production of a lower alkyl-thiosemicarbazide comprising steam distilling an aqueous solution containing hydrazine and an N-lower alkyl-dithiocarbamic acid quaternary ammonium salt thereby to effect pyrolysis while distilling off water, lower alkyl amine and hydrogen sulfide, and cooling the distilland to form crystals of the lower alkylthiosemicarbazide. Advantageously the solution is obtained by reacting carbon disulfide and methylamine in water, followed by addition of hydrazine.

REFERENCES:
patent: 3929877 (1975-12-01), Toth et al.
patent: 4132736 (1979-01-01), Cremm et al.
Jesen et al., Acta Chem. Scano. 22, 15 (1968).

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