反应详情

To a hot (70° C.) solution of 10.0 g (0.0336 mole) of the known compound 4'-amino-3,5-di-tertiary-butyl-4-hydroxybiphenyl in 100 ml of glyme was added 5.0 g (0.044 mole) of glutaric anhydride. After stirring for one hour, the mixture was cooled and poured into water. The precipitate was separated by filtration and recrystallized from a chloroform-hexane mixture to provide tan needles of N-(3',5'-di-tertiary-butyl-4'-hydroxy-4-biphenylyl)glutaramic acid, m.p. 217.5°-219° C. Analysis: Calculated for C25H33NO4 : % C, 73.0; % H, 8.1; % N, 3.4; Found: % C, 72.6; % H, 8.1; % N, 3.1.

1. temperaturethe mixture was cooled
2. customThe precipitate was separated by filtration
3. customrecrystallized from a chloroform-hexane mixture