Thiazoleneazetidinones from dithiazeneazetidinones

Details Thiazoleneazetidinones from dithiazeneazetidinones Thiazoleneazetidinones from dithiazeneazetidinones

C - Chemistry, Metallurgy

07

D

260/298.2

C07D 513/04 (2006.01)

Patent

CA 1063610

A B S T R A C T An improved process for preparing 4-thia- 2,6-diazabicyclo[3,2,0]hept-2-ene-7-ones such as methyl 3-phenoxy-4-thia-2,6-diazabicyclo[3,2,0]hept- 2-ene-7-one-6-isopropenylacetate which comprises extruding sulfur from dithiazeneazetidinones such as methyl 3-phenoxymethyl-4,5-dithia-2,7-diazabicyclo[4,2,0]- oct-2-ene-8-one-7-isopropenylacetate. The compounds obtained are useful intermediates in the preparation of certain 3-cephems.

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