67830-37-9

Upstream product

• 131713-44-5 (S)-((S)-2-Methyl-thiiranyl)-((1R,5R)-7-oxo-3-phenoxy-4-thia-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-acetic acid methyl ester 
• 59997-09-0 methyl 3-phenoxy-4,5-dithia-2,7-diazabicyclo<4.2.0>oct-2-ene-8-one-7-isopropenyl acetate 
• 33069-18-0 6β-aminopenicillanic acid 1β-sulfoxide 
• 131830-24-5 6β-phenoxythiocarbamidopenicillanic acid 1β-sulfoxide 
• 131830-27-8 (2S,4S,5R,6R)-3,3-Dimethyl-4,7-dioxo-6-phenoxythiocarbonylamino-4λ⁴-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid methyl ester 
• 95477-52-4 methyl 2-<2'(R and S)-chloro-4'-oxo-3'S-α-phenoxy-α-chloromethyleneiminoazetidin-1'-yl>-3-chloromethyl-3-chlorosulfenylbutanoate 
• 1005-56-7 phenylcarbonochloridothioate 

Relevant academic research and scientific papers

THE CHEMISTRY OF THE 6β-THIOAMIDOPENAM 1β-SULFOXIDES. THE 1,2,4-DITHIAZINEAZETIDINONES AND THIAZOLINEAZETIDINONES

6β-Thioamidopenam 1β-sulfoxides on thermolysis gave methyl 2-(3-substituted 4,5-dithia-2,7-diazabicyclooct-2-en-8-one-7-yl)-3-methyl-but-3-enoate (1,2,4-dithiazineazetidinones).The reaction of these compounds with halogenating agents is discussed.

Thiazoleneazetidinones from dithiazeneazetidinones

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.