765227-95-0

Upstream product

• 93680-49-0 (Z)-5-Methoxy-3-{(R)-1-[(4-nitro-benzyloxycarbonyl)-(triphenyl-λ⁵-phosphanylidene)-methyl]-4-oxo-azetidin-2-yloxy}-2-oxo-pent-3-enoic acid benzyl ester 
• 93680-48-9 (Z)-3-{(R)-1-[Chloro-(4-nitro-benzyloxycarbonyl)-methyl]-4-oxo-azetidin-2-yloxy}-5-methoxy-2-oxo-pent-3-enoic acid benzyl ester 
• 93680-47-8 (Z)-3-{(R)-1-[Hydroxy-(4-nitro-benzyloxycarbonyl)-methyl]-4-oxo-azetidin-2-yloxy}-5-methoxy-2-oxo-pent-3-enoic acid benzyl ester 
• 93680-44-5 benzyl 3-hydroxy-9-O-methylclavulanate 
• 63612-98-6 benzyl 9-O-methylclavulanate 

Downstream Products

• 93680-50-3 lithium (Z)-(6R)-3-benzyloxycarbonyl-2-(2-methoxyethylidene)-1-oxaceph-3-em-4-carboxylate 

Relevant academic research and scientific papers

Nuclear Modification of Clavulanic Acid. Preparation of Optically Active 1-Oxaceph-3-ems

Lithium (Z)-(6R)-3-benzyloxycarbonyl-2-(2-methoxyethylidene)-1-oxaceph-3-em-4-carboxylate and lithium (Z)-(6R)-2-(2-methoxyethylidene)-1-oxaceph-3-em-4-carboxylate have been prepared from clavulanic acid by way of an intramolecular Wittig reaction.Also fr