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:
Jan. 26, 2016
Filed:
Jun. 12, 2013
Bayer Cropscience Ag, Monheim, DE;
Mark James Ford, Schmitten, DE;
Gunter Karig, Hofheim am Taunus, DE;
BAYER CROPSCIENCE AG, Monheim, DE;
Abstract
The present invention relates to processes for the preparation of oxindoles and ortho-substituted anilines and their use as intermediates for syntheses. The invention further relates to a process for the preparation of compounds of formula (4): where a mixture of an aniline (compound of formula Q) is reacted with a thioether (compound of formula W): in the presence of a chlorinating agent and an organic solvent at a reaction temperature in the range above −65° C. In a subsequent process, this compound is further reacted in the presence of an acid catalyst to give the indole of formula (7) or the oxindole of formula (8):