FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing N-protected 6-(piperidin-4-ylcarbamoyl)piperidine-3-ylsulphonates of formula III, where compound of formula III is compound 3, which involves contacting lactone 2 with azacycloalkylamine 2-Am followed by contacting with sulphonyl halide 2-Su in presence of 4-dimethylaminopyridine. Invention also relates to intermediate compounds for preparing a compound of formula 3.
(3) 
(2) 
(2-Am) 
(2-Su).
EFFECT: novel method of producing N-protected 6-(piperidin-4-ylcarbamoyl)piperidine-3-ylsulphonates with high output and purity of the end product, which is intermediate for producing 7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carboxamides.
13 cl, 1 ex
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