Patent Number: 6,252,072

Title: Method for producing nitroguanidine derivatives

Abstract: A process for the preparation of compounds of formula ##STR1## is described, wherein R.sub.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl; R.sub.2 is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl or a radical --CH.sub.2 B; A is an unsubstituted or mono- to penta-substituted, aromatic or non-aromatic, monocyclic to bicyclic heterocyclic radical; and B is phenyl, 3-pyridyl or thiazolyl, which are optionally substituted by one to rhee substituents; by means of the hydrolysis of a compound of formula ##STR2## wherein R.sub.1, R.sub.2 and A have the same significances as given for formula (I), and R.sub.3 signifies unsubstituted or substituted C.sub.1 -C.sub.10 -alkyl, C.sub.3 -C.sub.6 -cycloalkyl, phenyl or benzyl; whereby the reaction is carried out at a pH value of between 7 and 14, as well as starting materials for carrying out the process. The compounds of formula (I) are suitable as intermediates in the preparation of pesticidal compositions.

Inventors: Maienfisch; Peter (Rodersdorf, CH), Widmer; Hansjurg (Basel, CH)

Assignee: Syngenta Crop Protection, Inc.

International Classification: C07D 307/14 (20060101); C07D 213/00 (20060101); C07D 307/00 (20060101); C07D 403/06 (20060101); C07D 277/00 (20060101); C07D 213/89 (20060101); C07D 213/61 (20060101); C07D 277/28 (20060101); C07D 403/00 (20060101); C07D 231/04 (); C07D 251/08 (); C07D 277/28 (); C07D 307/14 ()

Expiration Date: 06/26/2018