Benzene → Diphenylmethane

Participants

Reaction Conditions

Reaction Steps

To 111 parts of 2-amino-4-(m,m'-di-t-butyl-p-hydroxyphenyl)-butane, 500 parts by volume of benzene and 2 parts by volume of pyridine there are added, slowly, 55 parts of diphenylmethane-4,4'-diisocyanate in 500 parts by volume of chloroform at 25° to 30° C. The mixture is then heated at 40° C for 1 hour and filtered. There are obtained 77 parts (48% of theory) of 4,4'-di-4"' -(m,m'-di-t-butyl-p-hydroxyphenyl)-butyl-2"' -ureido]-diphenylmethane, m.p. 183° to 186° C after recrystallization from 1:1 benzene/methanol.

Provenance & Evidence