Patent Number: 6,166,214

Title: Process for preparing pyridylmethyl isothiocyanates

Abstract: The present invention relates to a novel process for preparing pyridylmethyl isothiocyanates of the formula (I) ##STR1## in which R.sup.1 represents halogen or C.sub.1 -C.sub.4 -alkyl, characterized in that in a first step, amines of the formula (II) ##STR2## in which R.sup.1 is as defined above, are reacted with xanthogenates of the formula (III) in which R.sup.2 represents C.sub.1 -C.sub.4 -alkyl, preferably methyl or ethyl and M represents an alkali metal, preferably sodium and potassium or represents ammonium, if appropriate in the presence of a diluent, and in a second step, the resulting novel dithiocarbamates of the formula (IV) ##STR3## in which R.sup.1 and M are each as defined above, are oxidized, if appropriate in the presence of a diluent, to give the isothiocyanates of the formula (I).

Inventors: Wagner; Klaus (Koln, DE), Lantzsch; Reinhard (Wuppertal, DE)

Assignee: Bayer Aktiengesellschaft

International Classification: C07D 213/00 (20060101); C07D 213/40 (20060101); C07D 213/61 (20060101); C07D 249/53 ()

Expiration Date: 12/26/2017