157463-10-0

Upstream product

• 82994-41-0 (E)-3-(tri-n-butylstannyl)-2-propen-1-ol 
• 110160-87-7 4-methoxybenzyl (6R,7R)-7-((Z)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)-2-(2-(tritylamino)-thiazol-4-yl)acetamido)-3-(chloromethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 

Downstream Products

• 184972-90-5 (6R,7R)-7-{2-[(Z)-1-tert-Butoxycarbonyl-1-methyl-ethoxyimino]-2-[2-(trityl-amino)-thiazol-4-yl]-acetylamino}-3-[(E)-2-(2-methyl-isoxazolidin-5-yl)-vinyl]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 4-methoxy-benzyl ester 
• 162081-87-0 (6R,7R)-3-((E)-Buta-1,3-dienyl)-7-{2-[(Z)-1-tert-butoxycarbonyl-1-methyl-ethoxyimino]-2-[2-(trityl-amino)-thiazol-4-yl]-acetylamino}-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 4-methoxy-benzyl ester 
• 157463-15-5 (6R,7R)-7-{2-[(Z)-1-tert-Butoxycarbonyl-1-methyl-ethoxyimino]-2-[2-(trityl-amino)-thiazol-4-yl]-acetylamino}-3-[(E)-4-(diphenoxy-phosphoryloxy)-but-2-enyl]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 4-methoxy-benzyl ester 

Relevant academic research and scientific papers

Structure-activity relationships of cephalosporins having a (dimethylisoxazolidlinio)vinyl moiety at their 3-position

A series of cephalosporins having a (dimethylisoxazolidinio)vinyl group at their 3-position were synthesized to investigate their structure-activity relationships. With regard to the olefin geometry, the (E)-vinyl compound exhibited higher in vitro activity than the (Z)-compound. Regarding the C-7 substituents, the replacement of 2-aminothiazole with 5-amino-1,2,4-thiadiazole increased the anti-pseudomonal activity. Determination of the absolute configuration of the C-3 substituent is also presented. Among the compounds synthesized, we selected 7β-(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(fluoromethoxyimino)acetamido]-3 -cephem-4-carboxylate (YM-40220), which showed well-balanced in vitro activity and an excellent in vivo efficacy against Staphylococcus aureus Smith, as a candidate for further development.