Method for producing triazolinethione derivatives

A process for preparing a triazolinethione derivative of the formula

• in which
• R1 and R2 are identical or different and each represents optionally substituted alkyl, optionally substituted alkenyl, optionally substituted cycloalkyl, optionally substituted aralkyl, optionally substituted aralkenyl, optionally substituted aroxyalkyl, optionally substituted aryl or optionally substituted heteroaryl, comprising reacting
• a) in a first step, a hydrazine derivative of the formula
• in which
• R1 and R2 are each as defined above with a carbonyl compound of the formula
• in which
• R3 represents alkyl having 1 to 4 carbon atoms or represents phenyl and
• R4 represents hydrogen or alkyl having 1 to 4 carbon atoms or
• R3 and R4 together represent a —(CH2)5— chain and with a thiocyanate of the formula
• X—SCN (IV),
• in which
• X represents sodium, potassium or ammonium, and reacting
• b) the resulting triazolidinethione derivative of the formula
• in which
• R1, R2, R3 and R4 are each as defined above with formic acid.