FIELD: organic chemistry. SUBSTANCE: product: 2,6-diacetyl-1,5-di-(R)-2,4,6,8-tetraazabicyclo[3,3,0] octane-- 3,7-dione of the formula (image) where R - H, m. p. is 328-330 C, yield is 60%; R - phenyl, m. p. is 295-301 C, yield is 67% . Reagent 1: glycoluryl or phenyl-substituted glycoluryl. Reagent 2: acetic acid. Reaction conditions: in the presence of 70% perchloric acid at the ratio of reagents 0.07:(0.28-0.32):(0.001-0.002). EFFECT: improved method of synthesis of compounds indicated above. 2 tbl
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