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. 15, 2003
Filed:
Jun. 18, 1999
Thomas Pitterna, Basel, CH;
Henry Szczepanski, Wallbach, CH;
Peter Maienfisch, Rodersdorf, CH;
Ottmar Franz Hüter, Lörrach, DE;
Thomas Rapold, Wallbach, CH;
Marcel Senn, Blonay, CH;
Thomas Göbel, Lörrach, DE;
Anthony Cornelius O'Sullivan, Basel, CH;
Syngenta Crop Protection, Inc., Greensboro, NC (US);
Abstract
Described is a process for the preparation of a compound of formula (I) wherein R is unsubstituted or substituted C -C alkyl, C -C alkenyl, C -C alkynyl, C -C cycloalkyl, aryl or heteroaryl, or —SR ; R is unsubstituted or substituted C -C alkyl, C -C alkenyl, C -C alkynyl, cycloalkyl, aryl or heteroaryl; and X is a leaving group; which comprises: a) reacting a compound of formula (II) wherein R is as defined for formula (I), with a water-removing reagent; or b) for the preparation of a compound of formula (I) wherein X is halogen or a sulfonate, reacting a compound of the formula (III) wherein R is as defined for formula (I), with a halogenating or a sulfonylating agent; or c) for the preparation of a compound of formula (I) wherein X is halogen, reacting a compound of formula (IV) wherein R is as defined for formula (I); and wherein R and R are for example H, C -C alkyl, C -C cycloalkyl, phenyl or benzyl; with a compound of the formula halogen-C(═O)—O—C -C alkyl, halogen-C(═O)—O-aryl or halogen-C(═O)—O-benzyl. Intermediates for the preparation of the synthesis of compounds (II) to (IV) and method of the preparation thereof.