hydrogen iodide; acetic anhydride 1 h; Heating;

sodium methylate in N,N,N',N',N'',N''-hexamethylphosphoric triamide; toluene 1.5 h; Heating;

<b>Multi-step reaction with 2 steps<br /> </b>1: 73 percent / triluoroacetic anhydride / 4 h / Ambient temperature<br />2: 98 percent / diethyl ether; benzene / 1 h / Ambient temperature<br /> <br /> &nbsp;