Formaldehyde → HCID 21521118, compound

Participants

Reaction Steps

40.5 g of 5-phenyl-1,3,4-oxadiazol-2-one (0.25 mol), 51.5 g of 2,6-di-tert.-butyl-phenol (0.25 mol), 8.2 g of paraformaldehyde (0.27 mol) and 0.7 g of hexamethylenetetramine in 150 ml of dimethylformamide and 15 ml of water are heated to 110°C for 15 hours, whilst stirring. A yellowish solution results, from which the 3-(3,5-di-tert.-butyl-4-hydroxybenzyl)-5-phenyl-1,3,4-oxadiazol-2-one (stabiliser No. 1) which is formed crystallises out on cooling to room temperature. The product is filtered off, washed with a little methanol and dried in vacuo at 70°C. Melting point: 164°C.

Provenance & Evidence