82206-55-1

Upstream product

• 60432-13-5 Methyl glyoxylate (E)-4-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)semicarbazone 
• 82206-54-0 Glyoxyilic acid (E)-4-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)semicarbazone 
• 71397-61-0 4-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)semicarbazide 
• 89-91-8 Methyl dimethoxyacetate 

Relevant academic research and scientific papers

4-β-D-RIBOFURANOSYL-1,2,4-TRIAZIN-3,5(2H,4H)-DIONE AND 4-β-D-RIBOFURANOSYL-6-METHYL-1,2,4-TRIAZIN-3,5(2H,4H)-DIONE

4-β-D-Ribofuranosyl-1,2,4-triazin-3,5(2H,4H)-dione (IX) and 4-β-D-ribofuranosyl-6-methyl-1,2,4-triazin-3,5(2H,4H)-dione were prepared by cyclization of (Z)-4-β-D-ribofuranosylsemicarbazones of methyl glyoxylate (VI) and methyl pyruvate (VIII) in the methanolic solution of sodium methoxide.A mixture of (E)- and (Z)-ribosylsemicarbazones III and IV was prepared by condensation of the ribosylsemicarbazide I with methyl dimethoxyacetate and a mixture of (E)- and (Z)-isomers V and VIII was obtained on condensation of I with methyl pyruvate.The (Z)-isomer VI was prepared on acid-catalyzed isomerization of (E)-isomer III while the (Z)-isomer VIII was obtained on the UV-irradiation of isomer V.