182750-66-9

Basic information

• Product Name: (2S,3R,5R)-3-Methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2,3-dicarboxylic acid 2-benzhydryl ester
• Synonyms: (2S,3R,5R)-3-Methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2,3-dicarboxylic acid 2-benzhydryl ester
• CAS NO: 182750-66-9
• Molecular Weight: 429.45
• Mol File: 182750-66-9.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: (2S,3R,5R)-3-Methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2,3-dicarboxylic acid 2-benzhydryl ester(CAS DataBase Reference)
• NIST Chemistry Reference: (2S,3R,5R)-3-Methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2,3-dicarboxylic acid 2-benzhydryl ester(182750-66-9)
• EPA Substance Registry System: (2S,3R,5R)-3-Methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2,3-dicarboxylic acid 2-benzhydryl ester(182750-66-9)

Safety Data

• Hazardous Substances Data: 182750-66-9(Hazardous Substances Data)

Upstream product

• 80353-26-0 6α-bromopenicillan-3α-carboxylic acid diphenylmethyl ester-1β-oxide 
• 87579-78-0 diphenylmethyl (2S,5R,6R)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide 
• 87579-79-1 (R)-benzhydryl 2-((R)-2-(benzo[d]thiazol-2-yldisulfanyl)-4-oxoazetidin-1-yl)-3-methylbut-3-enoate 
• 551-16-6 6-Aminopenicillanic Acid 
• 188249-92-5 diphenylmethyl (2S,3R,5R)-3-formyl-3-methyl-4,4,7-trioxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylate 
• 182750-64-7 benzhydryl 2β-(chloroacetoxy)methyl-1,1-dioxo-penicillanate 
• 182750-65-8 benzhydryl 2β-hydroxymethyl-1,1-dioxopenicillanate 

Downstream Products

• 189286-08-6 (2S,3R,5R)-3-(4-Benzyl-piperazine-1-carbonyl)-3-methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzhydryl ester 
• 189286-10-0 (2S,3R,5R)-3-((S)-2-tert-Butoxycarbonyl-pyrrolidine-1-carbonyl)-3-methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzhydryl ester 
• 1026477-53-1 (2S,3R,5R)-3-Chlorocarbonyl-3-methyl-4,4,7-trioxo-4λ⁶-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid benzhydryl ester 

Relevant articles and documents

Crystal structures of KPC-2 β-lactamase in complex with 3-nitrophenyl boronic acid and the penam sulfone PSR-3-226

Class A carbapenemases are a major threat to the potency of carbapenem antibiotics. A widespread carbapenemase, KPC-2, is not easily inhibited by β-lactamase inhibitors (i.e., clavulanic acid, sulbactam, and tazobactam). To explore different mechanisms of inhibition of KPC-2, we determined the crystal structures of KPC-2 with two β-lactamase inhibitors that follow different inactivation pathways and kinetics. The first complex is that of a small boronic acid compound, 3-nitrophenyl boronic acid (3-NPBA), bound to KPC-2 with 1.62-A resolution. 3-NPBA demonstrated a Km value of 1.0±0.1 μM (mean±standard error) for KPC-2 and blocks the active site by making a reversible covalent interaction with the catalytic S70 residue. The two boron hydroxyl atoms of 3-NPBA are positioned in the oxyanion hole and the deacylation water pocket, respectively. In addition, the aromatic ring of 3-NPBA provides an edge-to-face interaction with W105 in the active site. The structure of KPC-2 with the penam sulfone PSR-3-226 was determined at 1.26-A resolution. PSR-3-226 displayed a Km value of 3.8±0.4 μM for KPC-2, and the inactivation rate constant (k inact) was 0.034±0.003 s-1. When covalently bound to S70, PSR-3-226 forms a trans-enamine intermediate in the KPC-2 active site. The predominant active site interactions are generated via the carbonyl oxygen, which resides in the oxyanion hole, and the carboxyl moiety of PSR-3-226, which interacts with N132, N170, and E166. 3-NPBA and PSR-3-226 are the first β-lactamase inhibitors to be trapped as an acyl-enzyme complex with KPC-2. The structural and inhibitory insights gained here could aid in the design of potent KPC-2 inhibitors. Copyright