40028-93-1

Upstream product

• 40028-92-0 6-phthalimidopenicillanate sulphoxide p-nitrobenzyl ester 

Downstream Products

• 153784-99-7 (R)-2-[(2R,3R)-3-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-2-(5-methyl-isoxazol-3-ylsulfinamoyl)-4-oxo-azetidin-1-yl]-3-methyl-but-3-enoic acid 4-nitro-benzyl ester 
• 80523-24-6 2-[(2R,3R)-2-Chloromethanesulfinyl-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4-oxo-azetidin-1-yl]-3-methyl-but-2-enoic acid 4-nitro-benzyl ester 
• 153785-24-1 (2R,3R) 1-(1'-p-nitro-benzyloxycarbonyl-2'-methyl-prop-1'-enyl)-2-[(5'-methyl-isoxazol-3'-yl)amino-sulfonyl]-3-phthalimido-4-oxo-azetidine 
• 153785-08-1 (2R,3R) 1-(1'-p-nitrobenzyloxycarbonyl-2'-methyl-prop-1'-enyl)-2-[(5'-methyl-isoxazol-3'-yl)aminosulfinyl]-3-phthalimido-4-oxo-azetidine 
• 153785-26-3 3-Methyl-2-[(2R,3R)-3-(2-methylcarbamoyl-benzoylamino)-2-methylsulfamoyl-4-oxo-azetidin-1-yl]-but-2-enoic acid 4-nitro-benzyl ester 
• 153785-39-8 3-Methyl-2-[(2R,3R)-3-(2-methylcarbamoyl-benzoylamino)-2-methylsulfamoyl-4-oxo-azetidin-1-yl]-but-2-enoic acid 
• 153785-15-0 3-Methyl-2-[(2R,3R)-3-(2-methylcarbamoyl-benzoylamino)-2-methylsulfinamoyl-4-oxo-azetidin-1-yl]-but-2-enoic acid 4-nitro-benzyl ester 
• 58116-91-9 (R)-2-[(2R,3R)-2-Chloromethanesulfinyl-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4-oxo-azetidin-1-yl]-3-methyl-but-3-enoic acid 4-nitro-benzyl ester 

Relevant academic research and scientific papers

New Functionalized Monocyclic beta-Lactams Suitable Precursors for Anhydro 2-Azacephams

The anhydro 2-azacephams 9 were prepared starting from penicillanate sulphoxides 1 via 4-aminosulphinyl-2-oxoazetidines 3 and 4-aminosulphonyl-2-oxoazetidines 6 and 8.New functionalized monocyclic beta-lactams 5 and 7 were also produced as precursors for