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:
Dec. 12, 2000
Filed:
Aug. 06, 1999
Edwin Ritzer, Leverkusen, DE;
Robert Sollner, Leverkusen, DE;
Claus Dreisbach, Koln, DE;
Frank Jelitto, Bergisch Gladbach, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The present invention relates to a process for preparing optionally substituted benzyl carbazates of formula (I) ##STR1## wherein each R.sup.1 independently represents C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, di(C.sub.1 -C.sub.4 -alkyl)amino, nitro, halogen, hydroxyl, the group X-R.sup.3, wherein X represents O or S and R.sup.3 represents straight-chain or branched C.sub.1 -C.sub.4 -alkyl, the group COOR.sup.4, wherein R.sup.4 represents C.sub.1 -C.sub.4 -alkyl, the group NR.sup.5 R.sup.6, wherein R.sup.5 and R.sup.6 independently represent C.sub.1 -C.sub.4 -alkyl, or a C.sub.3 -C.sub.6 -cycloalkyl group that is optionally substituted by straight-chain or branched C.sub.1 -C.sub.4 -alkyl groups, and