A modified version of Markó's aerobic oxidation procedure, using highly pure (99.995+%) CuCl with 4, 7-diphenyl-1, 10-phenanthroline (dpPhen), DBAD, and Cs2CO3 (98% purity) successfully oxidized primary and secondary alcohols to the corresponding aldehydes and ketones in excellent yield at room temperature with either air or molecular oxygen under atmospheric pressure.