124223-53-6

Upstream product

• 128571-93-7 cis-1-(p-methoxyphenyl)-3-ethyl-4-formyl-2-azetidinone 
• 104-94-9 4-methoxy-aniline 
• 24978-42-5 1,4-bis(4'-methoxyphenyl)-1,4-diazabuta-1,3-diene 
• 124156-23-6 cis-3-Ethyl-4-(methoxycarbonyl)-1-(4-methoxyphenyl)azetidin-2-one 
• 124156-24-7 cis-1-p-anisyl-3-ethyl-4-carbethoxy-2-azetidinone 
• 124156-20-3 (4-methoxyphenyl-benzylidene)-carbamic acid methyl ester 
• 124156-23-6 3-ethyl-4-methoxycarbonyl-1-(4-methoxyphenyl)azetidin-2-one 
• 124156-30-5 Z-3-Ethylidene-4-(methoxycarbonyl)-1-(4-methoxyphenyl)azetidin-2-one 
• 119873-85-7 cis-1-p-Methoxyphenyl-3-vinyl-4-ethoxycarbonylazetidinone 
• 124156-22-5 cis-1-(4-Methoxyphenyl)-3-vinyl-4-(methoxycarbonyl)-2-azetidinone 
• 124156-32-7 3-Eth-(E)-ylidene-1-(4-methoxy-phenyl)-4-oxo-azetidine-2-carboxylic acid ethyl ester 
• 124156-21-4 ethyl (4-methoxyphenylimino)acetate 

Downstream Products

• 112114-01-9 1-p-anisyl-3-ethyl-4-acetoxy-2-azetidinone 
• 119067-41-3 trans-4-acetoxy-3-ethyl-1-(4-methoxyphenyl)azetidin-2-one 

Relevant academic research and scientific papers

β-Lactams via α,β-Unsaturated Acid Chlorides: Intermediates for Carbapenem Antibiotics

Stereocontrolled synthesis of α-vinyl β-lactams and their transformation to convenient intermediates for PS-5, PS-6, asparenomycin, and thienamycin are described.

The acid chloride-iminoester condensation: A direct approach to PS-5 and PS-6 intermediates and related compounds

The dehydrochlorination of alkanoyl chlorides with triethylamine in the presence of α-iminoesters produced 3-alkyl-4-alkoxycarbonyl β-lactams in excellent yields and high stereoselectivity.