HCID 12056523, compound → HCID 12056522, compound

Participants

Reaction Steps

6.52 g (21.2 mmol) of 5-hydroxymethyl-2-methyl-4-(2-methyl-5-phenylbenzyl-)2,4-dihydro-3H-1,2,4-triazol-3-o ne and 14 g of active manganese dioxide were stirred for 6 hours in nitrogen atmosphere under reflux with heating in 63 ml of chloroform. The reaction solution was filtrated through celite, and the filtrate was concentrated. The residue was subjected to silica gel column chromatography (eluant:hexane:ethyl acetate=1:1), to obtain 4.32 g (14.1 mmol) of 5-formyl-2-methyl-4-(2-methyl-5-phenylbenzyl)-2,4-dihydro-3H-1,2,4-triazol-3-one.

Provenance & Evidence