1: 2-methylbenzonitrile With N,N'-dimethyl-N,N'-propyleneurea; lithium diisopropyl amide in tetrahydrofuran T=-78°C; 0.5 h; 2: 3-bromo-2-methylprop-1-ene in tetrahydrofuran T=-78°C; 0.166667 h;