Process for making 2-(methylthio)-5(trifluoromethyl)-1,3,4,-thia

Details Process for making 2-(methylthio)-5(trifluoromethyl)-1,3,4,-thia Process for making 2-(methylthio)-5(trifluoromethyl)-1,3,4,-thia

1997-12-12

1999-12-21

Gerstl, Robert

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D28512

Patent

active

060051140

ABSTRACT:
The present invention provides a process for making 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole. The process includes the steps of reacting methyldithiocarbazinate with trifluoroacetic acid to form a mixture of 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole and 2,5-bis-(methylthio)-1,3,4-thiadiazole and selectively removing the 2,5-bis-(methylthio)-1,3,4-thiadiazole by acidifying the mixture.

REFERENCES:
patent: 3562284 (1971-02-01), Newman et al.
patent: 5101034 (1992-03-01), Schmidt et al.
patent: 5147443 (1992-09-01), Diehr et al.
patent: 5162539 (1992-11-01), Diehr
Gyoefi and Csavassy, Acta Chimica Academiae Scientiarum Hungaricae, Tomus 82 (1): 91-97, (month unavailable) 1974.

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