A process for preparing compounds of the formula: ##STR1## wherein R.sub.2 is lower alkyl; or phenyl optionally substituted by from one to five groups, the same or different, which are lower alkyl, lower haloalkyl, halogen or --SR.sub.4 ; R.sub.3 is halogen, lower alkyl, lower haloalkyl, lower alkoxy, lower haloalkoxy, --S-alkyl, cycloalkyl having from 3 to 7 carbon atoms in the ring, alkenyl or alkynyl having from 3 to 7 carbon atoms, or --(CR.sub.5 R.sub.6)--SR.sub.2 wherein q is one or two; R.sub.4 is lower alkyl; R.sub.5 and R.sub.6 independently represent hydrogen, lower alkyl or lower haloalkyl; and n is zero or an integer from one to three; intermediate compounds of the formula: ##STR2## and processes for preparing them.

Een proces om samenstellingen van de formule voor te bereiden: ## STR1 ## waarin R.sub.2 lagere alkyl is; of fenyl dat langs naar keuze van één tot vijf groepen, zelfde of verschillend wordt gesubstitueerd, die lagere alkyl, lagere haloalkyl, halogeen of -- SR.sub.4 zijn; R.sub.3 is halogeen, lagere alkyl, lagere haloalkyl, lagere alkoxy, lagere haloalkoxy, -- s-S-alkyl, cycloalkyl van 3 tot 7 koolstofatomen hebben in de ring, alkenyl of alkynyl die van 3 tot 7 koolstofatomen hebben, of -- (CR.sub.5 R.sub.6) -- SR.sub.2 waarin q één of twee is; R.sub.4 is lagere alkyl; R.sub.5 en R.sub.6 vertegenwoordigen onafhankelijk waterstof, lagere alkyl of lagere haloalkyl; en n is nul of een geheel van één tot drie; midden samenstellingen van de formule: ## STR2 ## en processen om hen voor te bereiden.

 
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