956474-84-3

Upstream product

• 439860-59-0 L-(4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-dicarboxylicacid monoethyl ester 
• 59779-75-8 diethyl (4R,5R)-2,2-dimethyl-1,3-dioxolane-4,5-dicarboxylate 
• 87-91-2 diethyl (2R,3R)-tartrate 
• 144851-93-4 (R,R)-tartaric acid monoethyl ester 
• 956474-73-0 (1S,4S,8R)-1,2-bis(4-methoxyphenyl)-6,6-dimethyl-3-oxo-5,7-dioxa[3.4]octane-8-carboxylic acid ethyl ester 

Relevant academic research and scientific papers

An efficient synthesis of azetidine-2,3-diones from L-(+)-diethyl tartrate

A convenient route to enantiopure azetidine-2,3-diones is described. The chiral ketene generated from commercially available L-(+)-diethyl tartrate on Staudinger cycloaddition with different imines gave spiro-β-lactams in good yields. These spiro-β-lactam