The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2009
Filed:
Nov. 15, 2002
Martin Zeller, Muenchwilen, CH;
Dominik Faber, Muenchwilen, CH;
Thomas Vettiger, Basel, CH;
Clemens Lamberth, Basel, CH;
Martin Zeller, Muenchwilen, CH;
Dominik Faber, Muenchwilen, CH;
Thomas Vettiger, Basel, CH;
Clemens Lamberth, Basel, CH;
Syngenta Crop Protection, Inc., Greensboro, NC (US);
Abstract
The invention concerns a novel process for the preparation of 2-phenyl-2-hydroxy-N-[2-(3-alkoxy-4-hydroxyphenyl)-ethyl]-acetamides of the formula (I), wherein Ris alkyl, Rand Rare each independently hydrogen or alkyl, and Ris optionally substituted aryl or optionally substituted heteroaryl, which process comprises reacting a 2-(3-alkoxy-4-hydroxyphenyl)-ethylamine of the formula (II), wherein RRand Rare as defined above with a α-hydoxycarboxylic acid ester of the formula (III) or a dioxolanone of the formula (III)a, wherein Ris as defined above, and R, Rand Rindependently of each other are lower alkyl. The compounds of formula (I) are important intermediates for a novel group of fungicides derived from mandelic acid amides.