Process for preparing azetidinones
CA 1325638 C · Owner: Gatti, Norberto · Inventors: Altamura, Maria; Bianchi, Daniele; Ricci, Marco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR PREPARING AZETIDINONES" Process for preparing compounds according to formula (I) (I), wherein R1 and R2 represent a hydrogen atom or a protective group and R3 represents a C1-C10 alkyl or an aryl group by oxidation of, compounds according to formula (II) (II), wherein R1, R2 and R3 have the above-mentioned meanings in a, two-phase system comprising:, a) an organic phase including a 4-acylazetidinone compound (II) and an "onium" salt dissolved in a medium immiscible with water b) an aqueous solution including an alkali or alkaline-earth metal salt of an organic or inorganic peracid. 4-Acyloxyazetidinones (I) are useful intermediates in the synthesis of anti-bacterial compounds.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 28, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.