115026-44-3

Upstream product

• 691-45-2 acetylketene 
• 127200-93-5 [Bis-(4-methoxy-phenyl)-methyl]-[(S)-2-(1-ethoxy-ethoxy)-prop-(E)-ylidene]-amine 
• 674-82-8 4-methyleneoxetan-2-one 
• 127200-93-5 [Bis-(4-methoxy-phenyl)-methyl]-[(S)-2-(1-ethoxy-ethoxy)-prop-(E)-ylidene]-amine 
• 126748-44-5 N-[bis(4-methoxyphenyl)methyl]-formamide 
• 184110-36-9 (2S,1'R/S)-2-(1'-Ethoxyethoxy)propanal 
• 19293-62-0 p,p'-dimethoxybenzhydrylamine 
• 90-96-0 bis(p-methoxyphenyl)methanone 
• 184110-35-8 (2S,1'R/S)-Ethyl-2-(1'-ethoxyethoxy)propanoate 

Downstream Products

• 127200-96-8 1-[Bis-(4-methoxy-phenyl)-methyl]-3-(1,1-dimethoxy-ethyl)-4-((S)-1-hydroxy-ethyl)-azetidin-2-one 
• 127254-25-5 (3R,4R)-1-di-p-anisylmethyl-3-(1,1-dimethoxyethyl)-4-<(S)-1-hydroxyethyl>-2-azetidinone 
• 127200-96-8 (3S,4S)-1-di-p-anisylmethyl-3-(1,1-dimethoxyethyl)-4-<(S)-1-hydroxyethyl>-2-azetidinone 
• 115075-45-1 (3R,4R)-3-acetyl-4-<(S)-1-benzyloxyethyl>-1-(di-p-anisylmethyl)-2-azetidinone 
• 115026-43-2 (3S,4S)-3-acetyl-4-<(S)-1-benzyloxyethyl>-1-(di-p-anisylmethyl)-2-azetidinone 
• 112256-78-7 (3S,4S)-4-<(S)-1-benzyloxyethyl>-1--3-<(R)-1-hydroxyethyl>-2-azetidinone 
• 115075-46-2 (3S,4S)-4-<(S)-1-benzyloxyethyl>-1--3-<(S)-1-hydroxyethyl>-2-azetidinone 
• 115026-45-4 (3S,4S)-4-<(S)-1-benzyloxyethyl>-3-<(R)-(1-t-butyldimethylsilyloxy)ethyl>-2-azetidinone 
• 112256-71-0 (3S,4S)-4-<(S)-1-benzyloxyethyl>-3-<(R)-1-hydroxyethyl>-2-azetidinone 

Relevant academic research and scientific papers

A NOVEL SYNTHESIS OF (3R,4R)-4-ACETOXY-3--2-AZETIDINONE, THE VERSATILE KEY INTERMEDIATE OF CARBAPENEM SYNTHESIS, FROM (S)-ETHYL LACTATE

A highly efficient synthesis of the title compound was accomplished employing the addition of diketene to chiral imine as a key stereoselective reaction and using inexpensive (S)-ethyl lactate as a starting material.