Process for preparing cephalosporin intermediates using alphaiodo-1-azetidineacetic acid esters and trialkylphosphites

Details for Australian Patent Application No. 2005225626 (hide)

Owner Pfizer Products Inc.

Inventors Nagakura, Isao; Morita, Hiromasa; Norris, Timothy

Agent Spruson & Ferguson

Pub. Number AU-B-2005225626

PCT Pub. Number WO2005/092900

Priority 60/551,845 09.03.04 US

Filing date 25 February 2005

Wipo publication date 6 October 2005

Acceptance publication date 13 March 2008

International Classifications

C07D 405/12 (2006.01) Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom

C07D 501/00 (2006.01) Heterocyclic compounds containing 5-thia-1-azabicyclo [4.2.0] octane ring systems, i.e. compounds containing a ring system of the formula: , e.g. cephalosporins

Event Publications

7 September 2006 PCT application entered the National Phase

  PCT publication WO2005/092900 Priority application(s): WO2005/092900

13 March 2008 Application Accepted

  Published as AU-B-2005225626

10 July 2008 Standard Patent Sealed

23 September 2010 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This patent ceased under section 143(a), or Expired. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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