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. 17, 1985
Filed:
Jun. 27, 1983
Karoly Lempert, Budapest, HU;
Gabor Doleschall, Budapest, HU;
Jozsef Fetter, Budapest, HU;
Gyula Hornyak, Budapest, HU;
Jozsef Nyitrai, Budapest, HU;
Gyula Simig, Budapest, HU;
Karoly Zauer, Szentendre, HU;
Richter Gedeon Vegyeszeti Gyav R.T., Budapest, HU;
Abstract
The invention relates to a process for the preparation of the compound of the formula I, ##STR1## which comprises (a.sub.1) splitting off the ethylene ketal protecting group from the azetidinone derivative of the formula IVa, ##STR2## reducing the compound of the formula III thus obtained, ##STR3## treating the resulting compound of the formula II ##STR4## with concentrated aqueous hydrogen chloride solution; or (a.sub.2) reducing the compound of the formula III, treating the compound of the formula II thus obtained with concentrated aqueous hydrogen chloride solution; or (a.sub.3) treating the compound of the formula II with concentrated aqueous hydrogen chloride solution; and isolating the compound of the formula I thus obtained from the reaction mixture. The compound of the formula I is useful as an intermediate in the production of thienamycin, a highly potent antibiotic.