1: AgBF4 / methanol / 25 °C / reaction order and rate constants for the reaction between methyl acetals of primary α-halogenoakyl aryl ketones and AgBF4; reaction with AgNO3; effect of the substituent in aromatic ring 2: 92 percent / aq. NaOH / methanol / 4 h / Ambient temperature View Scheme

zinc dibromide in toluene T=115°C; 1 h;

1: BF3*Et2O / CH2Cl2 / -70 °C 2: Yb(OTf)3 / 20 °C 3: 42 percent / n-Bu3SnH; AIBN / benzene / 40 h / Heating View Scheme