57561-85-0

Upstream product

• 41625-65-4 4-nitrobenzyl(2S,4S,5R,6R)-3,3-dimethyl-7-oxo-6-phenoxyacetamido-1-aza-4-thiabicyclo<3.2.0>heptane-2-carboxylate 4-oxide 
• 149-30-4 2-Mercaptobenzothiazole 

Downstream Products

• 120-78-5 di(benzothiazol-2-yl)disulfide 
• 28974-31-4 4-nitrobenzyl 7β-phenoxyacetamido-3-methyl-3-cephem-4-carboxylate 
• 60686-95-5 (6R)-3-methyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2ξ-carboxylic acid 4-nitro-benzyl ester 
• 149-30-4 2-Mercaptobenzothiazole 
• 64370-08-7 p-nitrobenzyl (2R,3R)-2-(benzothiazol-2'-yldithio)-α-isopropylidene-4-oxo-3-phenoxyacetylaminoazetidine-1-acetate 
• 70850-46-3 10-chloroacetoxy-1β-oxo-6β-(2-phenoxy-acetylamino)-1λ⁴-penicillanic acid 4-nitro-benzyl ester 
• 70850-44-1 10-hydroxy-6β-(2-phenoxy-acetylamino)-penicillanic acid 4-nitro-benzyl ester 
• 70850-49-6 10-hydroxy-6β-(2-phenoxy-acetylamino)-penicillanic acid 
• 70850-47-4 (1R)-1-methyl-4-oxo-5exo-(2-phenoxy-acetylamino)-3-oxa-9-thia-7-aza-bicyclo[4.2.1]nonane-8exo-carboxylic acid 4-nitro-benzyl ester 
• 143159-83-5 (E)-2-[(2R,3R)-2-(Benzothiazol-2-yldisulfanyl)-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-3-trifluoromethanesulfonyloxy-but-2-enoic acid 4-nitro-benzyl ester 
• 143159-84-6 4-Nitrobenzyl 2-[(3R,4R)-4-[(benzothiazol-2-yl)dithio]-3-phenoxyacetamido-2-oxo-azetidin-1-yl]-2,3-butadienoate 
• 90821-68-4 (E)-2-[(2R,3R)-2-(Benzothiazol-2-yldisulfanyl)-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-3-hydroxy-but-2-enoic acid 4-nitro-benzyl ester 
• 56446-42-5 p-nitrobenzyl 2β-bromomethyl-2α-methyl-6β-phenoxyacetamidopenam-3α-carboxylate 
• 70850-43-0 p-nitrobenzyl 3β-chloroacetoxymethyl-3α-methyl-7β-phenoxyacetamidocepham-4α-carboxylate 

Relevant academic research and scientific papers

A new strategy for the conversion of penams into cephems via allene chemistry

We describe an extension of the Morin rearrangement in which 3-norcephalosporins bearing sulfur substituents at C(3) are obtained directly from an allenic intermediate, which is efficiently prepared from penicillin V sulfoxide.

2-Penem compounds

The invention relates to 6-amino-2-penem-3-carboxylic acid compounds of the formula STR1 in which R1a denotes hydrogen or an amino protective group R1A and R1b represents hydrogen or an acy