ammonium cerium(IV) nitrate in water; acetonitrile T=0°C; 0.5 h;

ammonium cerium(IV) nitrate in water; acetonitrile T=0°C; 0.5 h;

ammonium cerium(IV) nitrate in water; acetonitrile T=0°C; 0.5 h;

1: 1-isocyanato-4-methoxybenzene in tetrahydrofuran; hexane T=-23 - 0°C; 2: With n-butyllithium in tetrahydrofuran; diethyl ether; hexane T=-105°C; 0.5 h; 3: benzaldehyde in tetrahydrofuran; diethyl ether; hexane T=-105 - 25°C; Further stages.;

chloro-trimethyl-silane; air in diethyl ether Irradiation (UV/VIS); to a suspn. of Cr-compd. TMSCl is added (0°C), mixt. is stirred for 1 h, a soln. of p-anisidine is added, mixt. is irradiated (24 h, room temp., Ar), solvent is removed in vac., residue is dissolved in EtOAc, filtered and oxidized (air; sunlight); mixt. is filtered (Celite), solvent is removed, residue is washed with aq. HCl and chromd. (hexane/EtOAc), elem. anal.;

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