Thiazoleneazetidinones from dithiazeneazetidinones

Details Thiazoleneazetidinones from dithiazeneazetidinones Thiazoleneazetidinones from dithiazeneazetidinones

1975-10-15

1978-05-23

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602391, 260239A, 544 18, 544 30, 544 5, 544 21, 544 28, 544 29, 544 30, C07D51304

Patent

active

040910261

ABSTRACT:
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-isopropenylacet ate 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-isopr openylacetate. The compounds obtained are useful intermediates in the preparation of certain 3-cephems.

REFERENCES:
patent: 3560483 (1971-02-01), Svokos et al.
patent: 3637684 (1972-01-01), Goldman
patent: 3879398 (1975-04-01), Ellerton et al.
patent: 3936447 (1976-02-01), Peterson et al.

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