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:
Feb. 01, 2000
Filed:
Nov. 10, 1998
Barry Jackson, Brig-Glis, CH;
Lonza AG, Gampel/Valais, CH;
Abstract
Chroman derivatives of the general formula: ##STR1## in which R.sup.1 is hydrogen or C.sub.1-4 -alkyl; R.sup.2 is C.sub.1-6 -alkyl, C.sub.3-6 -cycloalkyl, optionally substituted aryl or optionally substituted aryl-C.sub.1-6 -alkyl; R.sup.3, R.sup.5 and R.sup.6 independently of one another are hydrogen, halogen, C.sub.1-4 -alkyl or optionally substituted aryl; and R.sup.4 is C.sub.1-6 -alkyl, C.sub.3-6 -cycloalkyl, (C.sub.1-6 -alkoxy)methyl, optionally substituted aryl, optionally substituted aryl-C.sub.1-6 -alkyl, C-alkanoyl or optionally substituted aroyl, are obtained from hydroquinone derivatives and alkenes in the presence of Lewis acids. The chroman derivatives (I) are intermediates in the synthesis of pharmaceutical active ingredients, for example, of hypolipidemics.