May 27, 2013

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The following patent record is from the CAplusSM database.


Patent Number: US 8404855
Title: Preparation of 4-[(pyridin-3-ylmethyl)amino]-5H-furan-2-ones as insecticides
Inventor(s): Jeschke, Peter; Velten, Robert; Schenke, Thomas; Schallner, Otto; Beck, Michael; Pontzen, Rolf; Malsam, Olga; Reckmann, Udo; Nauen, Ralf; Goergens, Ulrich; Pitta, Leonardo; Mueller, Thomas; Arnold, Christian; Sanwald, Erich
Patent Assignee(s): Bayer CropScience A.-G., Germany
Source: Ger. Offen., 35 pp. CODEN: GWXXBX
Language: German

Title compds. [I; A = (substituted) pyridin-2-yl, pyridin-4-yl, pyridin-3-yl, pyridazin-3-yl, pyrazin-3-yl, 1,3-thiazol-5-yl; X = O, S, CH2; R1 = haloalkyl, haloalkenyl, halocycloalkyl, halocycloalkylalkyl; R2 = H, halo; R3 = H, alkyl], were prepd.  Thus, a mixt. of N-[(6-chloropyridin-3-yl)methyl]-3,3,3-trifluoropropan-1-amine, tetronic acid and 4-toluenesulfonic acid in toluene was heated under reflux to give 4-[[(chloropyridin-3-yl)methyl]-(3,3,3-trifluoropropyl)amino]furan-2(5H)-one.  Tested I at 0.8-4 ppm showed 100% kill of Myzus persicae after 6 days.

 View the full-text here.

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