1: SO2Cl2 / benzene / Heating 2: (i) aq. NaOH, (ii) (decarboxylation) View Scheme

1: aq. HNO3 / acetic acid 2: aq. HBr / Heating View Scheme

<b>With</b>&nbsp; <a href="#" onclick="return RXDsubstances(event, this, '746197', constants.ctx, '0')">trifluoroacetic anhydride</a> <br /> <br /> &nbsp;