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:
Jul. 01, 1997
Filed:
Nov. 02, 1994
Applicant:
Inventor:
Georg Schmailzl, Gersthofen, DE;
Assignee:
Hoechst Atkiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546 19 ;
Abstract
The invention relates to an environmentally friendly process for the preparation of compounds of the formula below ##STR1## in which R.sup.1 and R.sup.2 are preferably H or alkyl, R.sup.3 and R.sup.4 are preferably alkyl or cycloalkyl, R.sup.5 and R.sup.6 are preferably hydrogen or methyl and R.sup.7 is in particular alkyl. In the process, the additional use of a phase transfer catalyst can be dispensed with without loss in yield.