1: 2-bromo-1,3-dimethyl-5-t-butylbenzene With tert.-butyl lithium in diethyl ether; pentane T=-78 - 20°C; 2: 9,10-dihydro-9-oxoanthracene in diethyl ether; toluene; pentane Heating;

1: 2-bromo-1,3-dimethyl-5-t-butylbenzene With n-butyllithium in diethyl ether; hexane T=20°C; 2: anthrone in diethyl ether; hexane; toluene Heating;

bromine in tetrachloromethane T=20°C;