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:
Mar. 13, 1979
Filed:
May. 10, 1977
Reszo Bognar, Debrecen, HU;
Sandor Makleit, Debrecen, HU;
Geza Kiss, Debrecen, HU;
Sandor Berenyi, Debrecen, HU;
Terez Mile, Debrecen, HU;
Jozsef Knoll, Budapest, HU;
Sandor Elek, Tiszavasvari, HU;
Istvan Gyoker, Tiszavasvari, HU;
Attila Zoltai, Tiszavasvari, HU;
Gyorgy Toth, Tiszavasvari, HU;
Laszlo Litkei, Tiszavasvari, HU;
Alkaloida Vegyeszeti Gyar Tiszavasvari, Tiszavasvari, HU;
Abstract
A process for the preparation of pharmaceutically acceptable 3-protected derivatives of 6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine, selected from the group which consists of 3-O-acetyl-6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine, 3-O-tetrahydropyranyl-6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine and 3-O-methylenemethoxy-6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine, and the salts of these compounds which comprise the following steps: