1: 2-Brom-1,3-di-p-tolyl-propan-1,3-dion With triethyl phosphite in tetrahydrofuran T=20°C; 1 h; 2: Me2Cu(CN)Li2 With boron trifluoride diethyl etherate in tetrahydrofuran; diethyl ether T=-78°C; 2 h;