OH OH CH,Ch CF3COOH CH3-C-Ph CH3-C-Ph CF2 COOH CH Ph CF3C-0-0 CH3-C-OPh+CF3COoH H H CH2-C-OPh CH3-C-CH-Ph hCo,H CH2 C-oCH-Ph CH CHCI CHCH2Cl 2 CF3 COOH O CH3 C Ph OH + + CH3 C Ph OH CF3COOH O CH3 C Ph OH CF3C O O O H + CH3 C OPh OH + CF3 COOH H + CH3 C OPh O CH3 C CH O Ph CH3 * CH3 C OCH O Ph CH3 CHCl 3 PhCO3H