Part 1 _ Ortho_hydroxy_w_halo_acetophenones as starting materials in the rasoda reactions for the synthesis of flavonols Part 2 _ Synthesis of 2_aroyl_coumaranones and the corresponding flavonols from ortho_hydroxy_w_mono_and_di_halo_acetophenones Part 3 _ Synthesis of 2_4_dimethyl_8_acetyl_7_6_furo_coumarin and the corresponding furo_coumarone Part 4 _ Determination of the structure of some of the products derived from ortho_hydroxy and acetoxy_chalkone dibromides
