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:
Aug. 19, 1980
Filed:
Oct. 20, 1977
Applicant:
Inventors:
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07H / ;
U.S. Cl.
CPC ...
536 / ; 536-4 ; 536120 ;
Abstract
A process for the preparation of garamine and garamine derivatives of the formula (I) ##STR1## wherein the radicals R.sup.1 are each H or amino-protecting groups and the radicals R.sup.2 are each H or hydroxyl-protecting groups, comprises selectively cleaving in a strong acid a compound of formula (II) or a mixture thereof ##STR2## wherein R.sup.3 is acyl, R.sup.4 and R.sup.5 are each H or CH.sub.3 and R.sup.1 and R.sup.2 are the same as in formula (I).