1: With N,O-bis-(trimethylsilyl)-acetamide; [O3ReOSiPh3] in diethyl ether T=0°C; 0.5 h; 2: With potassium carbonate in methanol T=20°C; Title compound not separated from byproducts;

1: With N,O-bis-(trimethylsilyl)-acetamide; N-(trimethylsilyl)-acetamide; [O3ReOSiPh3] in diethyl ether T=0°C; 0.5 h; 2: With potassium carbonate in methanol 1 h; Title compound not separated from byproducts;

pyridine; xanthone powder; bis(2,4-acetylacetonate)cobalt(II); hydrogen in tetrahydrofuran P=760 Torr; Ambient temperatureIrradiation;

1: With N,O-bis-(trimethylsilyl)-acetamide; [O3ReOSiPh3] in diethyl ether T=0°C; 0.5 h; 2: With potassium carbonate in methanol T=20°C; Title compound not separated from byproducts;

2,2,6,6-tetramethyl-1-piperidinyloxy, free radical; iodosylbenzene; Re2O7 in dichloromethane T=20°C; 1 h; Molecular sieve;